Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2006, Vol. 29 ›› Issue (4): 107-110.doi: 10.13190/jbupt.200604.107.054

• Reports • Previous Articles     Next Articles

Optimized Irregular LDPC Codes Design for OFDM System

WEN Na, LU Wei-jia,LIU Xiang,ZHANG Ping,TAO Xiao-feng   

  1. Wireless Technique Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2004-08-23 Revised:1900-01-01 Online:2006-08-30 Published:2006-08-30
  • Contact: WEN Na

Abstract:

A simplified and optimized low density parity check (LDPC) codes for orthogonal frequency division multiplexing (OFDM) transmission is proposed. Making consideration of the channel fading characteristic and iterative decoding principle, high variable degree is used in deep fading sub-channel and low variable degree in light fading sub-channel. Simulation results show that the scheme exhibits a gain of 3 dB at bit error rate (BER) of 10-5 when code length is 1024 and code rate is 1/2 compared to regular codes and reduces the complexity of optimization design.

Key words: low density parity check code, orthogonal frequency division multiplexing, optimized code design

CLC Number: