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- Title
An Improved Method for Constructing QC-LDPC Codes Based on Chinese Remainder Theorem.
- Authors
LIU Yuan-hua; NIU Xin-liang; ZHANG Mei-ling
- Abstract
An improved combining method for designing quasi-cyclic low-density parity-check (QC-LDPC) codes based on Chinese Remainder Theorem (CRT) is proposed to improve the error-correcting performance by increasing the girth and decreasing the number of short cycles. With the CRT combining method, the difficult problem of designing QC-LDPC codes with girth g is translated into a task of designing one component code with girth g. By properly permuting the column blocks of parity-check matrices of other component codes, a lot of QC-LDPC codes with much shorter cycles and better performance can be designed, which are more suitable for communication systems with request of high reliability. Simulations show that compared with existing CRT-based QC-LDPC codes, the proposed QC-LDPC codes have much shorter cycles and obtain 1.2 dB coding gain at bit error rate(BER) of 10-6.
- Publication
Telecommunication Engineering, 2014, Vol 54, Issue 12, p1651
- ISSN
1001-893X
- Publication type
Article
- DOI
10.3969/j.issn.1001-893x.2014.12.012