Journal of Systems Engineering and Electronics ›› 2010, Vol. 32 ›› Issue (6): 1146-1150.doi: 10.3969/j.issn.1001-506X.2010.06.009

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Exploit of designing encoder for QC LDPC codes based on finite field approach

DOU Gao-qi, GAO Jun, ZHANG Wen-juan   

  1. Dept. of Communication Engineering, Naval Univ. of Engineering, Wuhan 430033, China
  • Online:2010-06-28 Published:2010-01-03

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Abstract:

To reduce the complexity of encoder for QC LDPC codes, an efficient encoding scheme by using the approximate-full-rank (AFR) parity check matrix is proposed. The AFR matrix is constructed based on finite field approach and can be used to find the systematic generator matrix efficiently. The scheme can be used to encode systematic LDPC codes with linear encoding complexity. Simulations verify its generality and practicality for QC LDPC codes with small column weights.

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