Title :
An energy adaptive demodulation for high data rates with impulse radio
Author :
Paquelet, Stéphane ; Aubert, Louis-Marie
Author_Institution :
Mitsubishi ITE-TCL, Rennes, France
Abstract :
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.
Keywords :
adaptive modulation; amplitude shift keying; channel estimation; data communication; demodulation; digital radio; frequency division multiplexing; pulse amplitude modulation; radio receivers; transceivers; ultra wideband communication; wireless LAN; UWB; approximative delay spread; channel estimation constraints; data rates; energetic threshold comparison; energy adaptive demodulation; energy level; frequency division multiplexing; hardware architectures; impulse radio; multi-band OOK modulation; noise level; nonlinear detection; on-off keying; pulse amplitude modulation; receiver; transceiver design; ultra wide band; wireless LAN; Channel estimation; Delay; Demodulation; Energy states; FCC; Hardware; Multipath channels; Noise level; RAKE receivers; Transceivers;
Conference_Titel :
Radio and Wireless Conference, 2004 IEEE
Print_ISBN :
0-7803-8451-2
DOI :
10.1109/RAWCON.2004.1389141