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Girth 4 test for LDPC codes

21 Jul 2007

We need to know that Girth 4 of H will lead to a poor BER performance. The program can test whether

File Information
Description	Recently, we find some published programs for the construction of LDPC codes have not concerned the Girth test problem, which will not the implementation of LDPC Codec to have good decoding BER. Thus, we publish a simple program to provide a tool for the girth 4 test of LDPC codes. Input a parity check matrix H with the format of the example in the program, the program can determine whether it has girth 4. Ref: [1] Y. Xiao, M -H Lee,Low complexity IMO-LDPC CDMA systems over multipath channels, IEICE Transactions on Communications, v E89-B, n 5, May, 2006, p 1713-1717 [2] J. Fan, Y. Xiao, A method of counting the number of cycles in LDPC codes, 8th International Conference on Signal Processing, ICSP 2006,Volume: 3, ISBN: 0-7803-9737-1, Digital Object Identifier: 10.1109/ICOSP.2006.345906 The papers [1] and [2] can be downloaded from Web site of IEICE and IEEE Explore.
MATLAB release	MATLAB 6.5 (R13)
Zip File Content
Other Files	LDPC_Girth4 Test/B1.txt, LDPC_Girth4 Test/LDPC_girth4a.m

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Everyone's Tags	coding theory, girth, information theory, lpdc, parity check matrices, test
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Comments and Ratings (2)
06 Aug 2007	xk Lu	Very Good!Thank you!
29 Sep 2008	silvia anggraeni	Thank you very much ....

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Tag Activity for this File
Tag	Applied By	Date/Time
coding theory	Yang Xiao	22 Oct 2008 09:20:01
information theory	Yang Xiao	22 Oct 2008 09:20:01
lpdc	Yang Xiao	22 Oct 2008 09:20:01
parity check matrices	Yang Xiao	22 Oct 2008 09:20:01
girth	Yang Xiao	22 Oct 2008 09:20:01
test	Yang Xiao	22 Oct 2008 09:20:01

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