An Impulse Radio Asynchronous Transceiver for High Data Rates Stephane paquelet, Louis-Marie Aubert and Bernard Uguen 05/24/2008 Inha Telecom Lab Inha.

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An Impulse Radio Asynchronous Transceiver for High Data Rates Stephane paquelet, Louis-Marie Aubert and Bernard Uguen 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab IEEE Conference 2004 on UWB Systems and Technologies

Objectives Providing an Operative way of achieving high data rates for Impulse Radio (IR) based transmission systems 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Contents Introduction Modulation and Channel Model Analysis System performances Hardware Implementation Conclusion 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Introduction This paper aims at designing a simple Tx/Rx architecture suitable for High Data Rates. WPAN issues are especially targeted. With respect to number of significant paths and signal distortion produced by both antennas and material propagation, synchronization and generally speaking channel estimation in IR schemes turns out to be a critical point to design a rake receiver. Asynchronous methods are favoured, since they require relaxed synchronization constraints. 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Modulation and Channel Model Favoring non-coherent demodulation, and thus a receiver working as an energy detector, information is preferably carried by signal amplitude rather than its phase It naturally leads us to consider Pulse Amplitude Modulation In that case, an OOK modulation appears to be a suitable candidate since it possesses a good optimality considering a non-coherent demodulation 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Modulation and Channel Model To Increase the system capacity, we propose to duplicate this basic scheme on several separate sub- bands (8-24) The adopted non-coherent receiver structure per sub- band is then following For an emitted pulse with waveform p(t), the received signal will be: 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Analysis For high data rates IR schemes, Tr>=Td (asTs<<Td) Symbol repetition periodis choosen as Tr>=Ts+Td Concentrating on a particular sub-band of width B in which a pulse of general waveform p(t) is located, the transmitted signal is then, 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Analysis Decision problem setting: Optimal Threshold: An Expression: 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Analysis 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Analysis: Numerical Curves 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Performance: Link Budget 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Performances: Numerical Results 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Hardware Implementation 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab

Conclusion This paper presents a simple non-coherent architecture providing high data rate with impulse radio The encouraging performances obtained show the obvious potential of these principles and the mainly analog-oriented transceiver could be fruitfully capitalized for low-cost applications. 05/24/2008 Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab Inha Telecom Lab