分层空时编码OFDM传输技术的研究

Journal of Applied Sciences ›› 2004, Vol. 22 ›› Issue (3): 308-313.

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Studies on Transmission Techniques of Layered Space-Time OFDM Systems

SU Peng-cheng, SUN Jun, ZHANG Ji-dong, SHI Cui-zhu

Institute of Image Communication & Information Processing Research, Shanghai Jiaotong University, Shanghai 200030, China

Received:2003-06-11 Revised:2003-12-01 Online:2004-09-30 Published:2004-09-30

Abstract

Abstract: In this paper a layer and space-time coded OFDM system is proposed to provide a diversity gain for the MIMO channels and alleviate the frequency-selective fading effect. At the receiver, an algorithm of suppressing and cancelling interference among alyers is employed to overcome the interference among users and provide reliable communications with high data rate over wideband wireless channels. And this system can be used to transmit scalable MPEG-4 video. The simulation results show that the proposed system has good transmission performance in an environmnet with a moderate signal-to-noise ratio.

Key words: OFDM, interfernce suppression, space-time codes, multiuser, MPEG-4

CLC Number:

TN914

SU Peng-cheng, SUN Jun, ZHANG Ji-dong, SHI Cui-zhu. Studies on Transmission Techniques of Layered Space-Time OFDM Systems[J]. Journal of Applied Sciences, 2004, 22(3): 308-313.

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Studies on Transmission Techniques of Layered Space-Time OFDM Systems

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