文章基本信息

标题：PERFORMANCE EVALUATION OF LDPC- AND TURBO-CODED OFDM BASED ON DMWCST
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作者：SAMEER A. DAWOOD ; F. MALEK ; M. S. ANUAR 等
期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2015
卷号：79
期号：1
出版社：Journal of Theoretical and Applied
摘要：In this paper, low-density parity-check (LDPC) codes and turbo codes (TCs) are proposed to improve the bit error rate (BER) performance of a new orthogonal frequency-division multiplexing (OFDM) system based on discrete multiwavelet critical-sampling transform (DMWCST). The use of channel coding in an OFDM based on the DMWCST (OFDM-DMWCST) system is useful in providing the desired performance at high data rates. The proposed systems have been tested according to different code rates and mapping schemes over additive white Gaussian noise, flat fading, and frequency-selective fading channels. The decoding technique used in the simulation for LDPC codes and TCs was iterative decoding because this method provides maximum efficiency at high iterations. Simulation results reveal that the coded OFDM-DMWCST system achieves large coding gain with low BER. Thus, this system offers a high data rate under wireless communication channels. Furthermore, the LDPC-coded OFDM-DMWCST system performs better than turbo-coded OFDM-DMWCST system.
关键词：OFDM; LDPC codes; turbo codes; multiwavelet critical-sampling transform; data rate; wireless channels