Proceedings of the Second Annual European Reconfigurable Radio Technologies Workshop
June 23 to 25, 2010, Mainz Germany

Zip files containing all of the papers and presentations are available at the bottom of the page

Date	Subtopic	File
Jun 23, 2010	Final Program	2010 ERRT Workshop Final Program 2010 ERRT Workshop Final Program
Jun 23, 2010	Invited Presentation	Session on Business Models and Markets for Cognitive Radio Matthius Barrie – Abstract - Cognitive Radio is a novel paradigm for mobile communications in which networks and handsets have the intelligence and autonomy to actively monitor and change their behavior. With several large research projects completed or underway, standardization efforts officially initiated in several bodies and Cognitive Radio put on the agenda of the ITU’s 2011 World Radiocommunication Conference, it is steadily progressing towards market introduction. In this process, Cognitive Radio is coming under increased scrutiny from regulators worldwide, while corporate stakeholders wonder what Cognitive Radio will mean for current and future business in terms of investment, value creation and competition.
Jun 25, 2010	Keynotes	Mobile Solutions based on SDR Technology: Programmable Platform for Multi-Standard Applications Presented by Prof. Dr. Ulrich Ramacher, Head of System Engineering for SDR Mobile Platforms, Infineon Wireless
Jun 25, 2010	Keynotes	Bridging Dream and Reality: Programmable baseband processor for SDR Presented by Dake Liu, Coresonic AB and Dept of Electrical Engineering, Linköping University
Jun 24, 2010	Keynotes	ETSI Reconfigurable Radio Systems (RRS) Keynote Presented by Dr. Markus Mueck (ETSI RRS Chairman) and Pierre-Jean Muller (ETSI RRS Vice Chairman), Huawei Technologies
Jun 24, 2010	Keynotes	OSSIE-based GRA Cognitive Testbed Director Briefing Presented by Tom Rittenbach, US Army CERDEC
Jun 23, 2010	Session 1.1	A Bank of coarse grain Common Operators for flexible multi standard SDR terminal. Laurent Alaus; Jacques Palicot; Dominique Noguet – Abstract - In the present day, heterogeneous wireless systems such as GSM , IS95 , PDC , DECT , UMTS , WIFI, WIMAX, LTE, T-DMB and DVB-T are being used or developed. Each of these standards defines various and distinct protocols of communication, which have to be handled by a multi standard equipment. The Classical Approach to implement such terminal is the Velcro Method, i.e. the coexistence of the different requirements and a simple switch to select the one appropriated. In view of this growing call for multi standard terminals, the duplication of each chain becomes unworkable from a technical and economical point of view and the crying need of new methodology of designing terminal reflects that. As a consequence, in the context of Software Defined Radio, we have already proposed a new parameterization method called the Common Operator Technique. This method defines high level granularity reconfigurable blocks, which could be configured by a simple “download" of parameters. In practical terms, the Common Operators can be seen as new pre-defined coarse-grain IPs of telecommunications oriented FPGA. The parameterization used as a reconfiguration process, is done in real time by a limited set of parameters, which do not change the design but only the functionality of the operator. From that point, CO based on FFT, CORDIC and LFSR have already been proposed. As an example, CORDIC could be parameterized for matrix inversion, filters, FFT .
Jun 23, 2010	Session 1.1	Graph theory approach for optimization of Multi-standards Software Defined Radio equipments Sufi Gul; Kaiser; Yves Louët; Christophe Moy – Abstract - This presentation targets the Flexible Baseband section. Introduction The communication chains of different air interface standards, intended to be implemented on a common platform, have some common signal processing operations such as channel coding, modulation, equalization, etc. In order to exploit to a great advantage the commonalities among these communication tasks for different standards, one needs firstly to identify these commonalities and secondly find the optimal way to implement a generic hardware platform with programmable modules. In this sense, a technique called parametrisation was introduced. Parametrisation is a very promising technique that consists of designing radio systems entities in a way which permits to take advantage of the programmable or at least reconfigurable capabilities of the underlying hardware of Software Radio (SR) systems. The key idea is to get an optimal sharing between hardware and software resources and find a best way to reuse some hardware and software modules that can be adapted just by a parameter change without affecting the system’s performances. Proceedings Pages 1-4
Jun 23, 2010	Session 1.1	Graph theory approach for optimization of Multi-standards Software Defined Radio equipments Sufi Gul; Kaiser; Yves Louët; Christophe Moy – Abstract - This presentation targets the Flexible Baseband section. Introduction The communication chains of different air interface standards, intended to be implemented on a common platform, have some common signal processing operations such as channel coding, modulation, equalization, etc. In order to exploit to a great advantage the commonalities among these communication tasks for different standards, one needs firstly to identify these commonalities and secondly find the optimal way to implement a generic hardware platform with programmable modules. In this sense, a technique called parametrisation was introduced. Parametrisation is a very promising technique that consists of designing radio systems entities in a way which permits to take advantage of the programmable or at least reconfigurable capabilities of the underlying hardware of Software Radio (SR) systems. The key idea is to get an optimal sharing between hardware and software resources and find a best way to reuse some hardware and software modules that can be adapted just by a parameter change without affecting the system’s performances. Proceedings Pages 1-4
Jun 23, 2010	Session 1.1	Implementing a Radio Virtual Machine on the MAGALI chip Riadh Ben Abdallah;Tanguy Risset; Antoine Fraboulet; Jérôme Martin – Abstract - Time to market is a key for commercial success of a SDR chip. Reusing hardware and reusing modern software development paradigms are the means to achieve a shorter time to market. Our work concerns the fast and portable development of new physical layer protocols (or waveforms) expressed in software, referred as "SDR programs". "Develop once, run anywhere" is the objective for SDR programs. It consists in providing full portability of waveforms between SDR platforms. To reach this portability the waveform specification must be expressed independently of its implementation, but also the executable specification should be, in some sense, independent of the implementation platform. Indeed, an SDR application should be able to download new waveform programs without knowing the implementation details of the chip it runs on. This problem can be solved with the use of a virtual machine: each SDR platform embed a virtual machine (VM) tuned to its own architectural details. All these VMs are able to interpret the same waveform executable specification expressed in a byte-code format. In this study we propose a virtual-machine based programming model applied to SDR that we call "Radio Virtual Machine" (RVM).
Jun 23, 2010	Session 1.1	Reconfigurable SDR Architecture for an OFDMA Real–time PHY Layer Pedro Suarez Casal; Angel Carro Lagoa; José A. García-Naya; Luis Castedo;Antonio Morales Méndez;José María Camas Albar – Abstract - The aim of this work is to define and validate a new Software Defined Radio (SDR) architecture for the design and implementation of reconfigurable Orthogonal Frequency Division Multiple Access (OFDMA) real–time PHY layers. The design follows the SDR principles and it is based on the “task” concept. In this case, a task is a set of operations that corresponds to a logical block of the system (e.g. I/Q modulation, synchronization, FFT, etc.) which can be executed in different type of processors. The system is built connecting different tasks in a proper way. The key concept here is the reconfigurability of the tasks constituting the system and, thus, the whole system. Reconfigurability denotes the capability of a system to modify its behavior according to configuration parameters. As an example of this reconfigurable architecture, we describe a real–time design and implementation of the IEEE 802.16e Mobile WiMAX physical layer downlink. The main objective of the implementation is the fully reconfigurability among the five profiles defined by the WiMAX Forum. These profiles require different FFT sizes (512 or 1024 subcarriers), bandwidths (3.5 MHz, 5 MHz, 7.5 MHz, 8.75 MHz and 10 MHz), code rates, subcarrier allocation modes, and other features. The reconfigurable architecture is based on Commercial Off–The–Shelf (COTS) modules available in the market. In our case we use COTS hardware, composed by a PCI carrier board with several TIM modules. Proceedings Pages 30-31
Jun 23, 2010	Session 1.1	Reconfigurable SDR Architecture for an OFDMA Real–time PHY Layer Pedro Suarez Casal; Angel Carro Lagoa; José A. García-Naya; Luis Castedo;Antonio Morales Méndez;José María Camas Albar – Abstract - The aim of this work is to define and validate a new Software Defined Radio (SDR) architecture for the design and implementation of reconfigurable Orthogonal Frequency Division Multiple Access (OFDMA) real–time PHY layers. The design follows the SDR principles and it is based on the “task” concept. In this case, a task is a set of operations that corresponds to a logical block of the system (e.g. I/Q modulation, synchronization, FFT, etc.) which can be executed in different type of processors. The system is built connecting different tasks in a proper way. The key concept here is the reconfigurability of the tasks constituting the system and, thus, the whole system. Reconfigurability denotes the capability of a system to modify its behavior according to configuration parameters. As an example of this reconfigurable architecture, we describe a real–time design and implementation of the IEEE 802.16e Mobile WiMAX physical layer downlink. The main objective of the implementation is the fully reconfigurability among the five profiles defined by the WiMAX Forum. These profiles require different FFT sizes (512 or 1024 subcarriers), bandwidths (3.5 MHz, 5 MHz, 7.5 MHz, 8.75 MHz and 10 MHz), code rates, subcarrier allocation modes, and other features. The reconfigurable architecture is based on Commercial Off–The–Shelf (COTS) modules available in the market. In our case we use COTS hardware, composed by a PCI carrier board with several TIM modules. Proceedings Pages 30-31
Jun 23, 2010	Session 1.2	Quantifying the Benefits of Cognitive Radio James Neel – Abstract - The Cognitive Radio Work Group (CRWG) in the Wireless Innovation Forum (formerly SDR Forum) is finalizing a report for members of the worldwide telecommunications and spectrum community who need to understand the benefits of using cognitive radio technologies in next generation wireless systems. Unlike most surveys that focus on a specific application or technology, in this report, published literature from renowned journals, conferences, and leading textbooks in this area are reviewed to identify reported quantifiable benefits of a wide range of cognitive radio technologies, including Dynamic Spectrum Access (DSA), spectrum markets, enhanced radio resource management techniques, cognitive networking applications, and cognitive MIMO approaches. Key results from each identified source are extracted and included in the body of the report to facilitate comparisons between various approaches while an appendix provides additional context to describe how the original authors’ generated the cited results for every cited paper / result.
Jun 23, 2010	Session 2.1	An Implementation of CCC Testbed with a GPU-based Clustering Platform SeungWon Choi; June Kim – Abstract - An Implementation of CCC Testbed with a GPU-based Clustering Platform Cloud Communication Center (CCC) is an innovative base station system with a new concept of separating the digital unit of the base station system from its RF (Radio Frequency) unit. In CCC, which is originated from "Cloud Computing", the base station system in outdoor includes RF units only, while all the digital units of each cell are combined together at one place in a form like telephone office. Recently, the CCC is receiving an extremely keen spotlight as a green technology because it provides a tremendous reduction of power consumption and conserves the fine view of inner city due to the integrated digital units in indoor and simplified RF units in outdoor, respectively. In Korea, as an effort of concentrated researches on the green technologies, a trial system of CCC has recently been built in order to evaluate the feasibility of commercializing the CCC. Introducing Software Defined Radio (SDR) in CCC, we can provide a remarkable flexibility to wireless network, meaning that the network can be configured dynamically according to its environment.
Jun 23, 2010	Session 2.1	Wireless Computing Resource Managers Vuk Marojevic; Ismael Gomez; Antoni Gelonch – Abstract - The coexistence of radio access technologies (RATs) characterizes modern wireless communications. As new radio standards emerge, the radio operators desire reusing existing radio infrastructure. Similarly, the introduction of a new user service cannot imply the need for a new mobile terminal. Designing multipurpose infrastructure and mobile terminals for integrating existing and future radio standards is challenging. Multimode hardware designs may be economically feasible today, but will soon become obsolete because of their limited flexibility. Moreover, intelligent and cognitive wireless networks require flexibility at all system layers. A software solution should then be considered, where software at least partly defines the radio transmission and reception modes of radio equipment. This software-defined radio (SDR) approach provides the flexibility of using one or another air interface and providing one or another service. It facilitates infrastructure or hardware upgrades and signal processing or software updates. The current and future wireless communications?with advanced radio access technologies, such as HDSPA, WiMAX 802.11e, and LTE?are characterized by sophisticated real-time services, high data rates, and complex signal processing algorithms. These radio services come at the cost of high computing demands. Multiprocessor execution environments are therefore envisaged for executing even single-user transceiver processing chains.
Jun 23, 2010	Session 2.1	Performance Overhead with High Level Waveform Development Stefan Nagel; Friedrich K. Jondral – Abstract - This paper is intended for the GNU Radio session. Waveform development for SDRs is currently moving away from straight programming in C or hardware based languages like Verilog or VHDL, to High Level Design with tools like GNU Radio and the GNU Radio Companion (GRC), OSSIE and its Waveform Developer (OWD) or MatLab/Simulink with its Real Time Workshop. In this presentation, we compare the performance of these three tools with an equivalent waveform component written in C.
Jun 23, 2010	Session 2.1	Energy-Efficient Filter Design Algorithm for Intelligent Software-Defined Radios Gaurav Sureka; Xiaojiang Tian; Kamran Kiasaleh - Abstract - In the future, personal telecommunication devices like cellular phones are expected to provide the consumers with the ability to use a single device in a seamless manner across multiple bands, standards and geographical regions with minimum or no input from the consumer. Achievement of this feat is a huge technological challenge for the telecommunication community. Proceedings Pages 28-32
Jun 23, 2010	Session 2.1	Energy-Efficient Filter Design Algorithm for Intelligent Software-Defined Radios Gaurav Sureka; Xiaojiang Tian; Kamran Kiasaleh - Abstract - In the future, personal telecommunication devices like cellular phones are expected to provide the consumers with the ability to use a single device in a seamless manner across multiple bands, standards and geographical regions with minimum or no input from the consumer. Achievement of this feat is a huge technological challenge for the telecommunication community. Proceedings Pages 28-32
Jun 23, 2010	Session 2.2	Coexistence of tactical cognitive radio networks Vincent Le Nir; Bart Scheers – Abstract - In this proposal, we consider the scenario in which N different cognitive radio networks can't cooperate with each other and wish to broadcast a common information to their network sharing the same Nc parallel sub-channels. Each network j has one transmitter and Tj receivers. This scenario is particularly adapted to tactical communications in which N different networks coexist in a given area and need to broadcast a different common information (voice, data...) to their group. Proceedings Pages 57-61
Jun 23, 2010	Session 2.2	Coexistence of tactical cognitive radio networks Vincent Le Nir; Bart Scheers – Abstract - In this proposal, we consider the scenario in which N different cognitive radio networks can't cooperate with each other and wish to broadcast a common information to their network sharing the same Nc parallel sub-channels. Each network j has one transmitter and Tj receivers. This scenario is particularly adapted to tactical communications in which N different networks coexist in a given area and need to broadcast a different common information (voice, data...) to their group. Proceedings Pages 57-61
Jun 23, 2010	Session 2.2	Integration of sensors and communication devices in first-responders’ equipment Rosolino Lionti; Vincent Azibert; Dominique Noguet;Olivier Roncière – Abstract - The fire and rescue services are faced in most of the cases with operations in confined spaces which make the events more difficult to deal with and more dangerous for the personnel involved. Whereas in early times the fear of fire was connected only to the fire itself, nowadays fire services all over the world agree on the fact that smokes make more casualties than fire. It is then of the utmost importance, for the efficiency of the intervention, to provide first responders with advanced autonomous sensing and communicating devices, to help them to operate in smoky places, and to allow the overall rescue operational and management chain to understand, analyse, manage and operate rapidly, to the point and in increased safety.
Jun 23, 2010	Session 2.2	The Stakes of Cooperative Techniques for Military and Public Safety Wireless Communications Jean-Christophe Schiel;François Montaigne; Guy Philippe – Abstract - Employing multiple antennas at the transmitter and at the receiver of wireless communications (MIMO) can provide significant benefits in terms of both throughput and reliability. Nevertheless, transmit diversity usually requires more than one antenna at the transmitter and mobiles cannot usually support multiple antennas due to mainly increased size (constrained to antenna elements spacing). Thus the concept of cooperation diversity has been introduced recently : each single-antenna mobile relay its own messages and each other’s one, so that all terminals can achieve transmit diversity (packets are routed indeed in an ad-hoc network but at a lower layer).
Jun 23, 2010	Session 3.1	Securing Software Reconfigurable Radio Devices John Fitton – Abstract - This presentation highlights the most recent work of the Wireless Innovation Forum’s (SDRF V2.0) Security Working Group titled “Securing Software Reconfigurable Communication Devices” (A document forthcoming in spring 2010). This document provides essential guidance and valuable recommendations for SDR developers regarding the process and key considerations necessary to produce security solutions applicable for a software reconfigurable radio platform.
Jun 23, 2010	Session 3.1	Performance Measurement According to ITOP on Modular Software Defined Radios Gerald Ulbricht; Christopher Laske – Abstract - Software Defined Radios (SDR) are very attractive for military communication systems, because they provide the flexibility necessary to use different waveforms on one hardware. Unfortunately, the RF modules are often restricted in its frequency range to achieve the required level dynamics at the antenna connector of such devices (e.g. due to collocated antennas). That is why a modular architecture with a frequency-independent, reconfigurable baseband unit and one or more frequency-specific transceiver modules is an appropriate choice.
Jun 23, 2010	Session 3.1	SDR4all: Software Defined Radio Made Easy Leonardo S. Cardoso – Abstract - In this contribution, we describe the potential of SDR4all (Software Defined Radio for all) to solve the bottlenecks and reduce the innovation cycle related to the design and implementation of flexible radio algorithms. SDR4all is a programmable software tool with radio cards for wireless researchers, students and engineers. It enables to implement in software any wireless scheme between two laptops. Using an flexible orthogonal frequency division multiplexing (OFDM) based implementation example, we describe the tool and show the performance of the transmission on a real wireless channel at 2.4 GHz ISM band.
Jun 23, 2010	Session 3.2	Smart-RF Project: Wideband digital predistortion for SDR transmitter Wilhelm Keusgen;Benjamin Schubert; Jacek Liszewski – Abstract - „Smart-RF“ is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency “New Media in Economy” of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings Pages 88-91
Jun 23, 2010	Session 3.2	Smart-RF Project: Wideband digital predistortion for SDR transmitter Wilhelm Keusgen;Benjamin Schubert; Jacek Liszewski – Abstract - „Smart-RF“ is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency “New Media in Economy” of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings Pages 88-91
Jun 23, 2010	Session 3.2	Smart-RF Project: -- Power efficient linear transmit amplifiers and RF-architectures Thomas Boegl; Rainer Bott – Abstract - Smart-RF Project: -- Power efficient linear transmit amplifiers and RF-architectures Author: Thomas Bögl, Rainer Bott Affiliation: Rohde & Schwarz GmbH & CO KG Abstract: „Smart-RF“ is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency “New Media in Economy” of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings Pages 96-99
Jun 23, 2010	Session 3.2	Smart-RF Project: -- Power efficient linear transmit amplifiers and RF-architectures Thomas Boegl; Rainer Bott – Abstract - Smart-RF Project: -- Power efficient linear transmit amplifiers and RF-architectures Author: Thomas Bögl, Rainer Bott Affiliation: Rohde & Schwarz GmbH & CO KG Abstract: „Smart-RF“ is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency “New Media in Economy” of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings Pages 96-99
Jun 23, 2010	Session 3.2	Smart-RF Project: Flexible and energy efficient multiband transceivers for mobile telecommunication Thomas Bitzer – Abstract - Smart-RF Project -- Flexible and energy efficient multiband transceivers for mobile telecommunication Authors: Thomas Bitzer, Dr. Andreas Pascht Affiliation: Alcatel Lucent Deutschland Abstract: „Smart-RF" is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency "New Media in Economy" of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings pages - 78-83
Jun 23, 2010	Session 3.2	Smart-RF Project: Flexible and energy efficient multiband transceivers for mobile telecommunication Thomas Bitzer – Abstract - Smart-RF Project -- Flexible and energy efficient multiband transceivers for mobile telecommunication Authors: Thomas Bitzer, Dr. Andreas Pascht Affiliation: Alcatel Lucent Deutschland Abstract: „Smart-RF" is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency "New Media in Economy" of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings pages - 78-83
Jun 23, 2010	Session 3.2	Smart-RF Project -- Antenna and Diplexer Solutions Jürgen Rumold; Roland Rathgeber – Abstract - „Smart-RF“ is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency “New Media in Economy” of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings Pages 92-95
Jun 23, 2010	Session 3.2	Smart-RF Project -- Antenna and Diplexer Solutions Jürgen Rumold; Roland Rathgeber – Abstract - „Smart-RF“ is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency “New Media in Economy” of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings Pages 92-95
Jun 23, 2010	Session 3.2	Smart-RF Project: Base station power amplifier concepts for future wireless communication standards A. Sayed, A. Al Tanany, A. Z. Markos, F. Goelden, G. Boeck - Abstract - „Smart-RF“ is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency “New Media in Economy” of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings Pages 84-87
Jun 23, 2010	Session 3.2	Smart-RF Project: Base station power amplifier concepts for future wireless communication standards A. Sayed, A. Al Tanany, A. Z. Markos, F. Goelden, G. Boeck - Abstract - „Smart-RF“ is a research and development project funded by the German Federal Ministry for Economics and Technology (BMWi) and is managed by the Project Management Agency “New Media in Economy” of German Aerospace Center (DLR). The project consortium consists of Alcatel-Lucent (consortium lead), Fraunhofer Society, Kathrein Group, Rohde&Schwarz, Signalion, the Technical University of Berlin and in project phase II also Telekom. The aim of this project is to enable very flexible new and competitive transceiver solutions for SDR applications on the field of public and professional mobile telecommunication. Proceedings Pages 84-87
Jun 23, 2010	Session 4.1	SDR Matures: Convergence of Technology and Economics Manuel Uhm – Abstract - Software-defined radio (SDR) technology has “crossed the chasm” in many market segments, including tactical radios, satellite modems and commercial wireless infrastructure. However, to be truly successful and reach mainstream, technology has to not only initially meet the requirements of the visionaries, but also meet the requirements of the pragmatists and conservatives – both technical, as well as economic. Technologies that fail to become mainstream often do so because they fail to meet the economic requirements. SDR is a technology that has now become mainstream in many markets.
Jun 23, 2010	Session 4.1	A Complete Design Flow for MILS in a Single High Assurance FPGA John Hoffman – Abstract - Next generation Type 1 cryptographic products demand both multiple independent levels of security (MILS) and high assurance, all delivered on a field programmable gate array (FPGA). Achieving this requires a detail-oriented process that incorporates a high level of verification and validation. This paper outlines such a process, describing a design-flow for producing high performance FPGAs for high assurance applications. The design-flow makes critical use of both the Cryptol™ specification language and associated tools, and the Xilinx® Single Chip Cryptographic (SCC) toolset.
Jun 23, 2010	Session 4.1	The Sandbridge Sandblaster SB3500 SDR MPSoC Baseband Processor For 4G Handsets John Glossner – Abstract - The Sandblaster architecture is a high-performance vector architecture targeted at digital signal processing applications. The Sandblaster 1.0 architecture was targeted at implementing the physical layer of 3G wireless standards, with peak data rates of up to 15 Mbps. In this paper, we describe an object code compatible version 2.0 of the Sandblaster architecture, which is targeted at the 4G standards, which support higher data-rates and more complex algorithms.
Jun 23, 2010	Session 4.1	Is one-to-one Porting of PHY-functionalities from Legacy Waveforms to SDR appropriate? Jan Leduc; Marc Adrat;Markus Antweiler; Harald Elders-Boll – Abstract - In the military domain, Software Defined Radios (SDR) will significantly improve future tactical communications. This improvement mainly results from realizing wideband networking waveforms (WNW). Due to the need of high data rates, these waveform applications (WFAs) can only be loaded on SDRs which offer enough computing power to serve them. For that purpose industry offers multiprocessor SDR platforms.
Jun 23, 2010	Session 4.1	ADRES: flexible high-performance baseband processor Tom Vander Aa; Antoine Dejonghe; Liesbet Van der Perre – Abstract - ADRES (Architecture for Dynamically Reconfigurable Embedded Systems) is a flexible high performance architecture template for low power embedded applications. It consists of a tightly coupled VLIW processor and a coarse-grained reconfigurable array. The ADRES array is a flexible template instead of a concrete instance. Together with a retargetable simulator and ANSI-C compiler, this tool chain allows architecture exploration and development of application-domain-specific processors. Coarse-grained array-based processors have higher power efficiency while keeping the flexibility of typical processor solutions. This combination addresses the need for more flexibility in tomorrow’s mobile devices.
Jun 23, 2010	Session 4.2	IQ Baseband Interface Specification for Military SDRs Gerald Ulbricht; Gerd Kilian – Abstract - Within this presentation, the specification of an IQ baseband interface between a baseband unit and a transceiver module of a Software Defined Radio (SDR) is introduced. Unfortunately, the RF modules of such devices are often restricted in its frequency range to achieve the required level dynamics at the antenna connector (e.g. due to collocated antennas). That is why a modular architecture with a frequency-independent, reconfigurable baseband unit and one or more frequency-specific transceiver modules is an appropriate choice.
Jun 23, 2010	Session 4.2	Tunable Microwave Amplifier Using a Compact MEMS Impedance Matching Network Frederic Domingue; Ammar Kouki – Abstract - Many studies have shown the potential of RF microsystems (RF-MEMS) to realize reconfigurable microwave passive components [1-2]. With the proliferation of wireless communication standards, reconfigurable microwave front-ends are becoming highly desirable. Particularly, it would be useful to have reconfigurable amplifiers that can be adjusted according to the application or to external conditions. Because the input and the output impedances of microwave transistors vary with the operating conditions, i.e., frequency, bias, bandwidth, temperature, etc., tunable matching networks are essential to having a single amplifier that can be reconfigured as these conditions. Proceedings Pages 124-125
Jun 23, 2010	Session 4.2	Tunable Microwave Amplifier Using a Compact MEMS Impedance Matching Network Frederic Domingue; Ammar Kouki – Abstract - Many studies have shown the potential of RF microsystems (RF-MEMS) to realize reconfigurable microwave passive components [1-2]. With the proliferation of wireless communication standards, reconfigurable microwave front-ends are becoming highly desirable. Particularly, it would be useful to have reconfigurable amplifiers that can be adjusted according to the application or to external conditions. Because the input and the output impedances of microwave transistors vary with the operating conditions, i.e., frequency, bias, bandwidth, temperature, etc., tunable matching networks are essential to having a single amplifier that can be reconfigured as these conditions. Proceedings Pages 124-125
Jun 23, 2010	Session 4.2	A Fully Digital GHz-Range Multimode Transmitter Front-End Based on Locked Delay Lines Pieter A. J. Nuyts; Peter Singerl; Dielacher Franz;Patrick Reynaert; Wim Dehaene – Abstract - A fully digital multimode transmitter front-end for wireless communication in the GHz-range is presented. The system uses polar modulation with pulse width modulation (PWM) on the amplitude path. Both amplitude and phase modulation are implemented using locked delay lines with high time-domain resolution (on the order of 10 ps), thus removing the need for reference frequencies above the carrier frequency. Proceedings Pages 126-128
Jun 23, 2010	Session 4.2	A 5mm2 40nm LP CMOS 0.1-6GHz SDR Transceiver Mark Ingels; Vito Giannini;Jonathan Borremans;Gunjan Mandal; Björn Debaillie; Peter Van Wesemael; Tomohiro Sano;Takaya Yamamoto; Dries Hauspie; Joris Van Driessche; Jan Craninckx – Abstract - A 5mm2 40nm digital CMOS SDR Transceiver is presented. The 0.1-6GHz RX features 4 LNAs, 25% passive mixer with IIP2 calibration, 5th order baseband filtering and a 50fJ/conv. step ADC. It achieves NF down to 2.4dB, more than 30dB EVM and 50dBm IIP2. A 0.1-3GHz TX with baseband filter, voltage sampled mixer and PPA achieves 3.2% EVM at 0dBm output, with CNR down to -156dBc/Hz. The system uses two dual-VCO 5.9-12.8GHz fractional-N PLLs.
Jun 23, 2010	Session 5.1	Waveform Applications Porting with the SCA – Experience and Lessons Learned Mark Turner – Abstract - The Joint Tactical Radio System (JTRS) Software Communications Architecture (SCA) serves as a standard defining a set of rules and protocols for military Software Defined Radio (SDR) applications. The foundation of the SCA is component based design (CBD) technology, where individual software components can be constructed into waveform applications, executing on top of a standardized infrastructure referred to as the SDR platform’s Operating Environment. A key tenant of the JTRS program and the use of the SCA is focused on the portability of waveform applications across various radio platforms, thereby facilitating lower cost and shorter time-to-market for the deployment of increased capabilities to war-fighters, in conjunction with improved communications interoperability.
Jun 23, 2010	Session 5.1	Rapid Development of a Generic GUI SCA-based Component for SCA Waveform Monitoring Jean-Philippe Delahaye – Abstract - The paper describes a software development experience report of an SCA based application for monitoring SCA compliant waveforms. The software development experience describe in this paper is driven by the aim of increasing our knowledge in the domain of SDR systems design and especially in software component based design, for software portability and reusability. This presentation will give an overview of the SDR system, development tools and methodologies used in this experience. Proceedings Pages 162-167
Jun 23, 2010	Session 5.1	Rapid Development of a Generic GUI SCA-based Component for SCA Waveform Monitoring Jean-Philippe Delahaye – Abstract - The paper describes a software development experience report of an SCA based application for monitoring SCA compliant waveforms. The software development experience describe in this paper is driven by the aim of increasing our knowledge in the domain of SDR systems design and especially in software component based design, for software portability and reusability. This presentation will give an overview of the SDR system, development tools and methodologies used in this experience. Proceedings Pages 162-167
Jun 23, 2010	Session 5.1	SCA: When Appropriate Tooling Makes the Difference François Lévesque; Steve Bernier – Abstract - The Software Communication Architecture (SCA) is component based methodology and a framework that is used for the development of the radios in the context of the JTRS program. This presentation will describe how appropriate tooling is crucial to succeed in creating an SCA radio. The use of tools allows radio manufacturers to easily create models and automatically generate compliant source code which contributes to dramatically reduce the development time and costs. The concept of Rapid Application Development and its importance in the process of developing an SCA radio will be discussed. Finally, this presentation will touch upon a tool which provides a new breed of SCA debugging features.
Jun 23, 2010	Session 5.2	Fusion strategies for Collaborative Spectrum Sensing Kamran Arshad; Klaus Moessner – Abstract - Selection of fusion scheme at the fusion centre in collaborative spectrum sensing has direct impact on the overall performance of the cognitive radio network as well as on the protection of incumbent licensed users. In this paper, fusion strategies at the fusion centre is investigated for hard and soft decision fusion and it has been concluded that for better spectrum sensing performance fusion centre needs some more information e.g. received SNR of all users along with soft and hard decisions. A genetic algorithm based weighted soft decision fusion framework is presented for the soft decision combining. Numerical results show that the proposed fusion strategies gives better spectrum sensing performance in terms of probability of detection and false alarm in various scenarios. Proceedings Pages 168-175
Jun 23, 2010	Session 5.2	Fusion strategies for Collaborative Spectrum Sensing Kamran Arshad; Klaus Moessner – Abstract - Selection of fusion scheme at the fusion centre in collaborative spectrum sensing has direct impact on the overall performance of the cognitive radio network as well as on the protection of incumbent licensed users. In this paper, fusion strategies at the fusion centre is investigated for hard and soft decision fusion and it has been concluded that for better spectrum sensing performance fusion centre needs some more information e.g. received SNR of all users along with soft and hard decisions. A genetic algorithm based weighted soft decision fusion framework is presented for the soft decision combining. Numerical results show that the proposed fusion strategies gives better spectrum sensing performance in terms of probability of detection and false alarm in various scenarios. Proceedings Pages 168-175
Jun 23, 2010	Session 5.2	Cooperative spectrum sensing over fading sensing and reporting channels Xitao Gong; Gerd H. Ascheid – Abstract - Cognitive radio (CR) system in general is a radio system employing technology that allows the system to obtain knowledge of its environment, established strategies to dynamically and autonomously adjust its parameters and protocols in order to achieve predefined objectives. It is considered as a key technology to enable the opportunistic spectrum access capability, which relies on the paradigm that allows CR to access bands licensed to primary users when these primary users are not utilizing them. To avoid distorting the primary users, spectrum sensing is conducted at CR to detect the presence/use of the primary users.
Jun 23, 2010	Session 5.2	Spectrum sensing solutions for mobile devices Liesbet Van der Perre;Antoine Dejonghe; Sofie Pollin – Abstract - Since the introduction of Opportunistic Spectrum Access as a new communication paradigm, research has focused on the introduction of improved techniques for spectrum sensing, establishing both theoretical foundations and building experimental prototypes proving the feasibility of spectrum sensing. Most of the existing solutions and prototypes however do not focus on the practical design constraints that have to be considered when using those techniques in low-power and low-cost handheld devices. IMEC will provide an overview of its solutions and roadmap towards a flexible spectrum sensing engine prototype, building on reconfigurable analog and digital building blocks, and most recent algorithmic solutions.
Jun 23, 2010	Session 6.1	The design and implementation of a real-time, software-based, multi-path fading channel emulator for an SDR development platform Brian A. Dalio; Ivan Aguayo; Kevin Shelby – Abstract - In this paper, we present the design and implementation of the channel emulator that is part of our software-defined radio (SDR) development platform. The emulator supports Rayleigh and Ricean fading as well as Additive White Gaussian Noise (AWGN). Any combination of paths is supported. On a per-path basis, the Doppler frequency, path amplitude, path delay, and (when appropriate) Ricean K-factor may be specified. The sampling frequency and SNR are specified for the channel model as a whole. For maximum flexibility, the emulator is entirely software-based, simplifying its reconfiguration at run-time. In its current implementation, up to seven separate paths may be specified.
Jun 23, 2010	Session 6.1	The Cascading Effects of Efficient Implementations and Configuration Parameters on Performance Properties Venkatesh Ramakrishnan;Gerd H. Ascheid; Marc Adrat; Markus Antweiler – Abstract - Algorithmic approaches for software defined radio (SDR) development are gaining popularity due to the potential of high reusability in implementing different waveforms [1, 2]. Considering both flexibility and efficiency requirements of a SDR, we have proposed a novel waveform development concept based on algorithmic libraries in [2]. One of the key advantages of our approach is the flexibility in implementing a waveform even on a fixed hardware platform. A waveform will be described based on the library of computation intensive Nuclei kernels and waveform implementation will be predominantly composed of a set of efficient implementations for Nuclei.
Jun 23, 2010	Session 6.1	Software Defined MAC for SDRs: Interfaces and Architecture Approach Marina Petrova; Petri Mähönen; Junaid Ansari;Andreas Achtzehn; Xi Zhang – Abstract - In this presentation we describe a framework of reconfigurable MAC that is based on decomposition analysis of fundamental MAC components. We focus on describing especially the API functionalities of such MAC design that can be used to rapidly implement and reconfigure MAC layers of the future SDR and CR platforms. Moreover, we elaborate some of the required interfaces towards PHY-layer functionalities that should be preferably standardized through a common abstraction layer or API.
Jun 23, 2010	Session 6.1	RF Integration – Cognitive Radio or Flexible High Dynamic Range Transceiver? Stefan Heinen; Gerd H. Ascheid; Venkatesh Ramakrishnan – Abstract - Next Generation Mobile Networks will not be adopted in a single wave resulting in a scattered geographical coverage by different standards and frequency band. The terminals have to cover all standards from 2G over 3G to 4G and even beyond. Cognitive radio promises a solution to this problem. The talk will review the RF requirements for a cognitive or at least software defined radio resulting from this scenario. Especially the RF performance limitations for the integration of FDD systems will be addressed. Blocking scenarios will be discussed in order to derive the basic requirements for broadband RF frontends. Finally the state of the art will reviewed in order to identify promising techniques able to cope with the RF integration challenges of mobile communication systems.
Jun 23, 2010	Session 6.2	Fast and Flexible Symmetrical Encryption Algorithm Based on Key-Updating Amr Kishk; Nagy Messiha;Nabil Ayad; Nawal A.Elfeshawy; Fathi Abd El-Samie – Abstract - Hacking is one of the greatest problems in the wireless local area network. Many algorithms have been used to prevent the outside attacks to eavesdrop or prevent the data to be transferred to the end-user correctly. In this paper, a new symmetrical encryption algorithm is proposed that prevents the outside attacks. The new algorithm avoids key exchange between users and reduces the time taken for the encryption and decryption. It operates at high data rate in comparison with DES, TDES, AES-256, and RC6 algorithms. The new algorithm is applied on a text file and voice message. Proceedings Pages 176-180
Jun 23, 2010	Session 6.2	Fast and Flexible Symmetrical Encryption Algorithm Based on Key-Updating Amr Kishk; Nagy Messiha;Nabil Ayad; Nawal A.Elfeshawy; Fathi Abd El-Samie – Abstract - Hacking is one of the greatest problems in the wireless local area network. Many algorithms have been used to prevent the outside attacks to eavesdrop or prevent the data to be transferred to the end-user correctly. In this paper, a new symmetrical encryption algorithm is proposed that prevents the outside attacks. The new algorithm avoids key exchange between users and reduces the time taken for the encryption and decryption. It operates at high data rate in comparison with DES, TDES, AES-256, and RC6 algorithms. The new algorithm is applied on a text file and voice message. Proceedings Pages 176-180
Jun 23, 2010	Session 6.2	CRoF: Cognitive Radio over Fibre Anwer Adel Al-Dulaimi – Abstract - Spectrum availability is an essential factor for deciding the continuity of cognitive networks broadcasting. Cognitive networks lease the spectrum temporary whenever the primary users went OFF. Thus, locally wireless situations affect rapidly the transmissions of the cognitive radios. This state becomes more complicated for cognitive mesh networks when establishing a link over many cells. Route creation failure may cause long time interruption for the cognitive networks especially when there is no spectrum available at some of the trajectory base stations. Hence, an entire interruption may occur at certain sites of the network. To solve this problem, Cognitive Radio over Fibre (CRoF) is developed for the next generation networks. CRoF technology is presented for the design and conception of a flexible wireless-optical access network. This proposal will proposes an infrastructure for migrate the Cognitive Radio (CR) to the headquarters of a new optical access design. Proceedings Pages 181-182
Jun 23, 2010	Session 6.2	CRoF: Cognitive Radio over Fibre Anwer Adel Al-Dulaimi – Abstract - Spectrum availability is an essential factor for deciding the continuity of cognitive networks broadcasting. Cognitive networks lease the spectrum temporary whenever the primary users went OFF. Thus, locally wireless situations affect rapidly the transmissions of the cognitive radios. This state becomes more complicated for cognitive mesh networks when establishing a link over many cells. Route creation failure may cause long time interruption for the cognitive networks especially when there is no spectrum available at some of the trajectory base stations. Hence, an entire interruption may occur at certain sites of the network. To solve this problem, Cognitive Radio over Fibre (CRoF) is developed for the next generation networks. CRoF technology is presented for the design and conception of a flexible wireless-optical access network. This proposal will proposes an infrastructure for migrate the Cognitive Radio (CR) to the headquarters of a new optical access design. Proceedings Pages 181-182
Jun 25, 2010	Session 7.1	GNU Radio on the OMAP3 Philip Balister – Abstract - For the GNU Radio Session. GNU radio is typically run on desktop PC's, however it is possible to run GNU Radio on embedded systems with varying degrees of success. Modern embedded processors such as the OMAP3 contain floating point SIMD (Single Instruction Multiple Data) units that can execute efficiently most of the existing GNU Radio code. The presentation will review embedded hardware used to run GNU Radio and specialized hardware features for signal processing available on recent processors designed for low power embedded systems.
Jun 23, 2010	Session 7.1	Wireless Key Exchange using the GNU Radio Platform Nico Doettling; Antonio Sobreira Almeida; Jörn Müller-Quade; Dejan Lazic – Abstract - GNU Radio Session. In this work the practicability of physical layer key exchange based on channel reciprocity is investigated. A GNU Radio prototype implementing a wireless key exchange protocol is presented. However, precise conditions for such protocol to be secure remain unclear. Some attacks on this protocol are explained and supporting experimental results are shown. Finally, some countermeasures, as a spread-spectrum extension of such protocol, are introduced and analyzed. The ubiquitous presence of wireless networks has renewed the interest in key exchange schemes on the physical layer. The prospect of information-theoretical security makes these schemes promising candidates for cryptographic infrastructures without hardness assumptions. One of the most promising techniques to generate cryptographic keys on the physical layer is based on the concept of reciprocity of wireless channels.
Jun 23, 2010	Session 7.1	Wireless Networks In-the-Loop: Emulating an RF front-end in GNU Radio Sebastian Koslowski;Martin Braun; Jens P. Elsner; Friedrich K. Jondral – Abstract – The objective of this work is to emulate the behavior of the Universal Software Radio Peripheral as an example of an RF front-end hardware for software radios. The model includes digital and analog signal processing. The emulator is implemented in GNU Radio and is intended to be used as part of a wireless network simulator. Proceedings Pages 183-188
Jun 23, 2010	Session 7.1	Wireless Networks In-the-Loop: Emulating an RF front-end in GNU Radio Sebastian Koslowski;Martin Braun; Jens P. Elsner; Friedrich K. Jondral – Abstract – The objective of this work is to emulate the behavior of the Universal Software Radio Peripheral as an example of an RF front-end hardware for software radios. The model includes digital and analog signal processing. The emulator is implemented in GNU Radio and is intended to be used as part of a wireless network simulator. Proceedings Pages 183-188
Jun 23, 2010	Session 7.1	IEEE 802.11p Transmission Using GNURadio Paul Georg Fuxjaeger;Andrea Costantini; Danilo Valerio; Paolo Castiglione;Giammarco Zacheo;Thomas Zemen; Fabio Ricciato – Abstract - In this work we present an implementation of a fully functional IEEE 802.11p transmitter in software-defined radio. We describe the rapid-prototyping methodology that was used to implement the frame-encoder within the open-source GNU Software Radio (GNURadio) platform. The encoder generates OFDM frames in digital complex base-band representation and uses the USRP2 as digital-to-analog front-end for up-conversion and final transmission. Since the actual encoding process involves a large number of complex steps we split the development approach into three sequential stages. First, a reference-encoder in a high-level language (MATLAB) is derived from the IEEE standard documents. Second, the individual blocks of the MATLAB encoding chain are progressively ported to GNURadio, cross-checking with the reference after each step. Finally, standard compliance is verified by conducting comparative over-the-air measurements with an early prototype of a commercial 11p transceiver.
Jun 23, 2010	Session 7.2	SCA Based APCO Project-25 Waveform Implementation on the SDR-4000 Murat Ceven; Ercument H Zorlu; Hamza Ozer; Harun Karabalkan; Ibrahim Olcer – Abstract - APCO Project-25 (P25) was developed within the standards process driven by the P25 Steering Committee, which is made up of customer representatives from federal, state, and local public safety organizations and agencies. In case of emergency, P25 users are able to communicate with other agencies and mutual aid response teams. The standard enables system migration which is backward compatible with existing systems, and allows forward compatibility with next-generation radios. Through employing APCO P25, designing scalable systems from single channel conventional to regional trunking is possible. P25 systems can be configured in voting, multicast, and/or simulcast designs, and still include the talkaround capability required by public-safety agencies. Proceedings Pages 189-192
Jun 23, 2010	Session 7.2	SCA Based APCO Project-25 Waveform Implementation on the SDR-4000 Murat Ceven; Ercument H Zorlu; Hamza Ozer; Harun Karabalkan; Ibrahim Olcer – Abstract - APCO Project-25 (P25) was developed within the standards process driven by the P25 Steering Committee, which is made up of customer representatives from federal, state, and local public safety organizations and agencies. In case of emergency, P25 users are able to communicate with other agencies and mutual aid response teams. The standard enables system migration which is backward compatible with existing systems, and allows forward compatibility with next-generation radios. Through employing APCO P25, designing scalable systems from single channel conventional to regional trunking is possible. P25 systems can be configured in voting, multicast, and/or simulcast designs, and still include the talkaround capability required by public-safety agencies. Proceedings Pages 189-192
Jun 23, 2010	Session 7.2	EULER project : Vision for interoperability in joint operations for restoring safety after crisis Bruno Calvet; Timo Braysy;Jean-Julien Sabiani – Abstract - Propose a new high data rate waveform supporting the complex requirements of security forces joint operations relevant 802.16e subset collaborative waveform implementation. Address interoperability by defining how SDR capabilities can be integrated in a security (P&GS) communication system. Implement high data rate capable SDR platforms. Seperation of roles between SDR platform and SDR waveform providers.
Jun 16, 2010	Session 7.2	Multiradio Terminals Ari Immonen - Abstract - The purpose of the presentation is to discuss the use of multiradio terminals in a govermental and public safety context. The new satellite S-Band combined with traditional cellular bearers such as 3G bring added complexity to terminals, at the same time as the combination brings unique coverage which is unmatched in the industry today.
Jun 23, 2010	Zipfiles	2010 ERRT Presentations by Session Zipfile The file ERRT_10_Presentations.pdf contains the table of contents for the zip file. Note: zip file is 90+MB
Jun 11, 2010	Zipfiles	2010 ERRT Papers by Session Zipfile The file ERRT_10_Papers.pdf contains the table of contents for the zip file.

Proceedings of the Second Annual European Reconfigurable Radio Technologies WorkshopJune 23 to 25, 2010, Mainz Germany

Proceedings of the Second Annual European Reconfigurable Radio Technologies Workshop
June 23 to 25, 2010, Mainz Germany