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Journal of Applied Sciences ›› 2012, Vol. 30 ›› Issue (1): 59-66.doi: 10.3969/j.issn.0255-8297.2012.01.010

• Communication Engineering • Previous Articles     Next Articles

A Family of Protograph-Based LDPC for PR Channels

CHEN Ping-ping1, FANG Yi2, WANG Lin2   

  1. 1. Department of Electronic Engineering, Xiamen University, Xiamen 361005, Fujian Province, China
    2. Department of Communication Engineering, Xiamen University, Xiamen 361005, Fujian Province, China
  • Received:2011-04-10 Revised:2011-05-11 Online:2012-02-09 Published:2012-01-30

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Abstract:

Abstract: For additive white Gaussian noise (AWGN) channel, Jet Propulsion Laboratory (JPL) proposed an AR4JA protograph low density parity check (LDPC) code with good bit error rate (BER) performance and simple hardware implementation. However, such a code is unsuitable for partial response (PR) channels.
This paper introduces a new family of protograph LDPC (near-regular) codes, which are tailored for a typical EPR4 channel of PR channels. The finite-length extrinsic information transfer (EXIT) is also extended to PR systems based on protograph codes of limited code length. In a Monte Carlo simulation over EPR4 channel, the proposed code shows a considerable performance gain both in low- and high-SNR regions compared to regular LDPC codes with column-weight-three, and thus can be viewed as a good code for PR channels.
Keywords:

Key words: protograph low density parity check codes, bit error rate (BER), error floor, near-regular

CLC Number: