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Evaluation of low density parity-check codes on frequency-selective fading channels

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2 Author(s)
Deshan Miao ; Sch. of Inf. Eng., Beijing Univ. of Posts & Telecommun., China ; Daoben Li

Many papers have shown that low density parity-check (LDPC) codes exhibit excellent performance in the additive white noise (AWGN) channel and flat fading channels, but their performance on frequency-selective fading channels slightly degrades. In this paper, we evaluate the performance of quasi-regular low density parity-check codes in frequency-selective fading channels based on the large area synchronization code division multiple access (LAS-CDMA) system. Simulation results show that LDPC codes outperform turbo codes at high signal-to-noise ratio (SNR) over a wild range of mobile speeds. Furthermore we simply analyze the reasons on their differences on performance, indicating that the distance spectrum plays a very important role to the performance of codes.

Published in:

Communications and Information Technology, 2005. ISCIT 2005. IEEE International Symposium on  (Volume:1 )

Date of Conference:

12-14 Oct. 2005