Title :
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
fDate :
29 June-1 July 2002
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;
Conference_Titel :
Communications, Circuits and Systems and West Sino Expositions, IEEE 2002 International Conference on
Print_ISBN :
0-7803-7547-5
DOI :
10.1109/ICCCAS.2002.1180630
