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

Volume

1

fYear

2004

fDate

17-19 May 2004

Firstpage

540

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th

ISSN

1550-2252

Print_ISBN

0-7803-8255-2

Type

conf

DOI

10.1109/VETECS.2004.1388011

Filename

1388011