Systematic code design method for irregular low density parity check code and communication system thereof
A low-density parity and design method technology, applied in the field of communication channel coding, can solve problems such as performance loss, difficulty in implementation, and complex encoder structure, and achieve simple structure, easy hardware implementation, and easy decoding performance loss.
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[0158] Embodiment: present embodiment realizes the ILDPC code design method that the present invention proposes with software on Tsinghua Tongfang PC, as Figure 5 shown, including the following steps:
[0159] After the program starts, it first enters the initialization state 501 . In this step, first generate a M b ×N b dimensional zero-based matrix H b , and according to the ILDPC code row / column weight distribution and the parameters of the base matrix, the number of sum / product nodes of each order in the base matrix and the non-zero values that each row / column of the base matrix should have are determined by formulas (30)-(33) number of elements. After completing these operations, the program jumps to step 502 to start generating non-zero elements of the base matrix. In this step, the left side of the all-zero matrix M b × M b The 0 elements of part of the diagonal are replaced with 1, thus obtaining I Mb×Mb . Then in steps 503-508, the right side N of the basi...
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