Title :
A new OFDM demodulation method to reduce influence of ISI due to longer delay than guard interval
Author :
Suzuki, Noriyoshi ; Uehara, Hideyuki ; Yokoyama, Mitsuo
Author_Institution :
Toyota Central R&D Labs. Inc., Aichi, Japan
Abstract :
We propose a new OFDM demodulation method in order to reduce the influence of the intersymbol interference (ISI) and improve the bit error performance in the presence of multipaths whose excess delays are longer than the guard interval (GI). The influence of the ISI is eliminated or reduced by a variable-length windowed reception, and then the ICI component is reduced by a multi-stage intercarrier interference (ICI) canceller. The simulation results show that the proposed method improves the system availability under more various multipath fading environments without changing the system parameters.
Keywords :
OFDM modulation; code division multiple access; demodulation; error statistics; fading channels; interference suppression; intersymbol interference; multipath channels; multiuser channels; spread spectrum communication; DS/CDMA system; ISI reduction; OFDM demodulation; bit error performance; delay; guard interval; intercarrier interference; intersymbol interference; multipath fading environments; multistage ICI canceller; simulation results; system availability; system parameters; variable-length windowed reception; Demodulation; Fading; Interference cancellation; Intersymbol interference; Multiaccess communication; OFDM; Propagation delay; TV; Tiles;
Conference_Titel :
Communication Systems, 2002. ICCS 2002. The 8th International Conference on
Print_ISBN :
0-7803-7510-6
DOI :
10.1109/ICCS.2002.1182473
