The OFDM System Based on the Fractional Fourier Transform

Author

Chen, Enqing ; Tao, Ran ; Meng, Xiangyi

Author_Institution

Dept. of Electron. Eng., Beijing Inst. of Technol.

Volume

3

fYear

2006

fDate

Aug. 30 2006-Sept. 1 2006

Firstpage

14

Lastpage

17

Abstract

Transmission over wireless channels can lead to intersymbol interference (ISI) as well as interchannel (or intercarrier) interference (ICI). To decrease the results of ICI, this paper proposes an OFDM system based on the fractional Fourier transform (FrFT) in which traditional Fourier transform is replaced by fractional Fourier transform to modulate and demodulate the symbols. The multiplicative filter in fractional Fourier domain has been designed to equalize the received signal. Theoretical analysis and numerical simulation results show that the proposed equalizer in optimal fractional Fourier domain can significantly improve the performance of the system as compared to the Fourier domain equalizer

Keywords

Fourier transforms; OFDM modulation; adjacent channel interference; equalisers; intersymbol interference; wireless channels; Fourier domain equalizer; OFDM system; fractional Fourier transform; interchannel interference; intersymbol interference; multiplicative filter; optimal fractional Fourier domain; wireless channel; Chirp; Digital video broadcasting; Dispersion; Equalizers; Filters; Fourier transforms; Frequency domain analysis; Interchannel interference; Intersymbol interference; OFDM;

fLanguage

English

Publisher

ieee

Conference_Titel

Innovative Computing, Information and Control, 2006. ICICIC '06. First International Conference on

Conference_Location

Beijing

Print_ISBN

0-7695-2616-0

Type

conf

DOI

10.1109/ICICIC.2006.537

Filename

1692105