An energy adaptive demodulation for high data rates with impulse radio

摘要

The purpose of This work is to provide an operative way of achieving high data rates for impulse radio (IR) transmission based systems. Because applications targeted for ultra wide band (UWB) are low-cost, we especially focus on simple transceiver design. To that effect, we present an original demodulation scheme adapted to a multi-band on-off keying (OOK) modulation. The receiver's novelty consists of considering only the benefit from approximative delay spread and energy level to relax channel estimation constraints. The optimum demodulation turns out to be a non-trivial energetic threshold comparison whose precise theoretical computation admits an original analytical solution proving its feasibility. The knowledge of the available energy as well as the noise level required to set the threshold is easily obtained by appropriate estimators. Finally, in addition to simple hardware architectures, numerical results show the efficiency of these techniques.