Software Listing of Author : "Gabofetswe Malema"

The program contructs column-weight three girth-eight QC-LPDC codes given row-weight and sub-matrix size. row-weights and sub-matrices sizes are variable.

  • Platform: Matlab, Scripts

The program searches for a girth 10 QC-LDPC code given size of sub-matrix, row and column weights. The configuration of sub-matrices could also be changed. The program offers flexibility in constructing girth-10 QC-LDPC codes compared to other algorithms. The program builds a Tanner graph by connecting groups of rows and columns. A connection is made if it does not form less than ten-cycles. The program may fail to find a code given particular parameters. It also does not find the smallest codes compared to other algorithms.

  • Platform: Matlab, Scripts

The program constructs girth-6 type III qc-ldpc codes given base matrix and sub-matrix size. The sub-matrices sizes are variable. The program uses a search algorithm. It could fail to construct a code given some parameters. In that case the user could try many times or could simply increase the size of the code to improve chances of finding a code. The constructed code is stored in H.

  • Platform: Matlab, Scripts

The program constructs girth-8 type II qc-ldpc codes given Base matrix, size of sub-matrix and row and columns weights. The base matrix, weights and size of sub-matrices are all variable. The program uses a search algorithm which might fail to find a code. The program could be run many times to find a code or simply increase the size of the code. The parity check matrix is stored in H.

  • Platform: Matlab, Scripts

The program constructs qc-lpdc codes given size of sub-mnatrix(m), girth(g1), row (k) and column(j) weights. It uses a serch algorith that might not find a code gvien the above parameters. The program is also given a Base-Matrix.

  • Platform: Matlab, Scripts

The program searches for a girth 12 QC-LDPC code given size of sub-matrix, row and column weights. The configuration of sub-matrices could also be changed. The program offers flexibility in constructing girth-12 QC-LDPC codes compared to other algorithms. The program builds a Tanner graph by connecting groups of rows and columns. A connection is made if it does not form less than twelve-cycles. The program may fail to find a code given particular parameters. It also does not find the smallest codes compared to other algorithms.

  • Platform: Matlab, Scripts

The program constructs girth-six QC-LDPC codes given row-weight,k, column-weight,j, and sub-matrix size,m. The obtained parity-check matrix is stored in H. The construction has flexibility in that j,k and m can be varied.The program achieves girth-six by applying the row-column constraint. There are m rows in j submatrices. No two rows should share the same column more than once. This constraint is applied to avoid 4-cycles. The construction has flexibility in that j,k and m can be varied.

  • Platform: Matlab, Scripts

The program constructs girth-twelve column-weight QC-LPDC codes. The rate can be changed by changing k(row-weight), size is changed by varying m(sub-matrix size). The program/algorithm does not guarantee to get girth twelve code. It guarantees girth of eight. One may need to run the programs many times to get girth of twelve.

  • Platform: Matlab, Scripts
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