A new OFDM frame structure in time-varying channel robust to Doppler frequency spread

Author

Jinzhi, Zhou ; Anchun, Wang ; Xibin, Xu ; Yan, Yao

Author_Institution

State Key Lab on Microwave & Digital Commun., Tsinghua Univ., Beijing, China

Volume

1

fYear

2002

fDate

29 June-1 July 2002

Firstpage

323

Abstract

How to reduce or suppress the intercarrier interference (ICI) is one of the key problems in OFDM systems. In this paper, we propose a new frame structure for OFDM transmission and the corresponding demodulation algorithm in mobile communications. Analysis and simulation results indicate that without-loss of bit rate, this signaling structure can ideally achieve the same BER performance at two times Doppler frequency spread of the classical OFDM in flat fading channels, and it can improve greatly the BER performance of the OFDM system in multipath fading channels.

Keywords

Doppler effect; OFDM modulation; demodulation; error statistics; fading channels; fast Fourier transforms; interference suppression; mobile radio; multipath channels; time-varying channels; BER performance; Doppler frequency spread; FFT; OFDM frame structure; demodulation algorithm; flat fading channels; intercarrier interference suppression; mobile communications; mobile radio; multipath fading channels; orthogonal frequency division multiplexing; signaling structure; simulation results; time-varying channel; Bit error rate; Demodulation; Fading; Interference suppression; Mobile communication; OFDM; Performance analysis; Robustness; Signal analysis; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on

Print_ISBN

0-7803-7547-5

Type

conf

DOI

10.1109/ICCCAS.2002.1180630

Filename

1180630