1 Architectures and Tools for the Design of Reconfigurable Radio Systems Olivier Sentieys IRISA/INRIA – CAIRN Project-Team Joint team with INRIA, CNRS Université de Rennes 1 and ENS Cachan [email protected]2 2 Agenda What is inside a (reconfigurable) radio system (terminal and base-station) ? Some challenges Reconfigurable architectures Design, prototyping and compilation On-going and past projects 3G/4G, MIMO Wireless Sensor Networks Other research activities CAIRN project-team A cairn in Bréhat
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Architectures and Tools for the Design of Reconfigurable Radio Systems
Olivier Sentieys IRISA/INRIA – CAIRN Project-Team
Joint team with INRIA, CNRS Université de Rennes 1 and ENS Cachan
Cooperative MIMO technique Three phases of cooperative MIMO
communications Phase 1: Local data exchange Phase 2: Cooperative MIMO transmission Phase 3: Cooperative reception
S D MIMO transmission
dm<<d
dm = 1..10 m d
dm
Nt
Nr
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Energy consumption efficiency
Cooperative MIMO technique is more energy efficient than SISO and multi-hop SISO techniques for long distance transmission
T. Nguyen, O. Berder, and O. Sentieys, “Impact of transmission synchronization error and cooperative reception techniques on the performance of cooperative MIMO systems ”, ICC 2008, Beijing, China. T. Nguyen, O. Berder, and O. Sentieys, “Cooperative MIMO schemes optimal selection for wireless sensor networks,” IEEE 65th Vehicular Technology Conference, VTC-Spring, pp. 85–89, 2007.
and rake, max-ratio combining Real-time prototype of a WCDMA 2-2
• From matlab/simulink simulations • to real-type prototype
base-station, RF front-end, reconfigurable platform T Saidi, S. Roy, O. Sentieys. A testbed for evaluation of MIMO WCDMA architectures, in ISSSE’07, Montréal, Canada, 2007
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Rapid Prototyping
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Software Defined Radio (SDR) Flexible arithmetic operators Multi-mode components
Different: modes, parameters, algorithms e.g. channel coding, CDMA
Adaptive architectures dynamically modify the structure of
• the architecture, the algorithm, the accuracy depending on the context
• channel condition, standard, environment e.g. to minimize the dissipated power
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Rapid Prototyping for SDR GNU Radio for Software Radio
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MIMO Systems Pre-coding or beamforming
Goal: migrate processing towards base-station Linear pre-coder (max-dmin)
Towards a 4G testbed MIMO/OFDM
• Influence of algorithmic and precision parameters on the quality of transmission and on energy
LTE standard context Suitable for radio-over-fibre
Q. Ngo, O. Berder, and O. Sentieys, “Minimum distance based precoder for MIMO-OFDM systems using a 16-QAM modulation”, ICC 2009, Dresden, Germany.
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Agenda What is inside a (reconfigurable) radio
system (terminal and base-station) ? Some challenges Reconfigurable architectures Design, prototyping and compilation On-going and past projects
3G/4G, MIMO Wireless Sensor Networks
Other research activities CAIRN project-team
A cairn in Bréhat
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True Random Number Generation True Random Number Generator
Based on oscillator sampling with random jitter On-chip jitter measurement Embedded statistical tests Suitable for FPGA and ASIC Focus on increasing bit-rate
MIMO channel emulator Collaboration with SmartQuantum
Quantum Cryptography
33 33 CAIRN Team
CAIRN team at a glance IRISA : Institut de Recherche en Informatique et
Systèmes Aléatoires UMR CNRS 6074, INRIA Rennes Nearly 600 people, 31 research teams
CAIRN team 37 people, Lannion (ENSSAT) and Rennes (Campus de
Beaulieu, ENS Cachan) Domain-Specific and Reconfigurable System-on-Chip