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Girth 4 of Gallager codes 1.0

  Date Added: May 28, 2013  |  Visits: 180

Girth 4 of Gallager codes

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The Program to test the girth 4 of Gallager LDPC codesCopyright (C) Yang XIAO, BJTU, July 26, 2007, E-Mail: yxiao@bjtu.edu.cn,The program analyzes the girth 4 for Gallager LDPC codes. The figures showthe parity check matrix H and the girth test matrix O, respectively.Fig 1 can help us know the 1sd-deOao distribution of the parity check matrix H.Fig. 2 is the result of girth 4 for the given H.Theorem in Ref [1]: The H matrix has no gith4, if and only if the O matrix in Fig.2 has no entry value to be larger than 1.Ref:[1] Y. Xiao, M -H Lee, d-deDULow complexity MIMO-LDPC CDMA systems over multipath channelsd-deDt,IEICE Transactions on Communications, v E89-B, n 5, May, 2006, p 1713-1717[2] J. Fan, Y. Xiao, d-deDUA method of counting the number of cycles in LDPC codesd-deDt,8th International Conference on Signal Processing, ICSP 2006,Volume: 3,ISBN: 0-7803-9737-1, Digital Object Identifier: 10.1109/ICOSP.2006.345906[3] MOHAMMED ALKHANBASH, Gallager LDPC, Matlab center, File Exchange, 2007The papers [1] and [2] can be downloaded from Web site of IEICE and IEEE Explore.

Requirements: No special requirements
Platforms: Matlab
Keyword: Codes Conference Counting Cycles Ieice International Number Processing Signal Transactions
Users rating: 0/10

License: Shareware Size: 10 KB
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