For the issue of inflexible parameters with respect to the small column weight and code rate of the parity check matrix in the quasi-cyclic low-density parity-check( QC-LDPC) codes,this paper presented a construction method with large column weight and deterministic structure. By making use of the feature that common difference between the elements in the exponent matrix,this method constructed a parity check matrix that the girth was eight,with the structure of quasi cyclic. On this basis,the above method ...
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