Title :
Laboratory experiment of OFDM transmission using VLP and pre-FFT equalizer over ISI channels
Author :
Yoshida, Makoto ; Amezawa, Yasuharu ; Sonobe, S. ; Sugitani, Atsuhiko
Author_Institution :
Fujitsu Ltd., Yokosuka, Japan
Abstract :
A system using variable-length pilot symbols and a pre-FFT equalizer to overcome intersymbol interference (ISI) in OFDM transmission has been laboratory tested using a newly developed software-defined radio based test bed that is controlled using multiple CPUs. The results demonstrate that the system can provide a bit error rate of less than 10-4 for a fast multipath fading channel that has a moving velocity of more than 200 km/h with a delay spread of 1.9 μs in the 5 GHz band. The proposed system is thus effective and feasible for fourth-generation mobile communication systems.
Keywords :
4G mobile communication; OFDM modulation; delays; equalisers; fading channels; fast Fourier transforms; interference suppression; intersymbol interference; mobile radio; multipath channels; 1.9 mus; 5 GHz; ISI channels; OFDM transmission; bit error rate; delay spread; fast fading channel; fast multipath fading channel; fourth-generation mobile communication systems; intersymbol interference; multipath channel; multiple CPU; pre-FFT equalizer; software-defined radio based test bed; variable-length pilot symbols; Bit error rate; Control systems; Equalizers; Fading; Intersymbol interference; Laboratories; OFDM; Radio control; Software testing; System testing;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th
Print_ISBN :
0-7803-8255-2
DOI :
10.1109/VETECS.2004.1388011
