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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.2 P.141~148


LDPC based time-frequency double differential space-time coding for multi-antenna OFDM systems

Author(s):  Tian Ji-feng, Jiang Hai-ning, Song Wen-tao, Luo Han-wen

Affiliation(s):  Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai 200030, China

Corresponding email(s):   jifeng.tian@siemens.com

Key Words:  Differential space-time coding, OFDM, Time-varying channels, Frequency-selective fading, LDPC

Tian Ji-feng, Jiang Hai-ning, Song Wen-tao, Luo Han-wen. LDPC based time-frequency double differential space-time coding for multi-antenna OFDM systems[J]. Journal of Zhejiang University Science A, 2006, 7(2): 141~148.

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%A Luo Han-wen
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A0141

T1 - LDPC based time-frequency double differential space-time coding for multi-antenna OFDM systems
A1 - Tian Ji-feng
A1 - Jiang Hai-ning
A1 - Song Wen-tao
A1 - Luo Han-wen
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.A0141

differential space-time coding was proposed recently in the literature for multi-antenna systems, where neither the transmitter nor the receiver knows the fading coefficients. Among existing schemes, double differential space-time (DDST) coding is of special interest because it is applicable to continuous fast time-varying channels. However, it is less effective in frequency-selective fading channels. This paper’s authors derived a novel time-frequency double differential space-time (TF-DDST) coding scheme for multi-antenna orthogonal frequency division multiplexing (OFDM) systems in a time-varying frequency-selective fading environment, where double differential space-time coding is introduced into both time domain and frequency domain. Our proposed TF-DDST-OFDM system has a low-complexity non-coherent decoding scheme and is robust for time- and frequency-selective Rayleigh fading. In this paper, we also propose the use of state-of-the-art low-density parity-check (LDPC) code in serial concatenation with our TF-DDST scheme as a channel code. Simulations revealed that the LDPC based TF-DDST OFDM system has low decoding complexity and relatively better performance.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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