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为了降低码长较长的LDPC码在随机构造下编译码的复杂度与难度,利用PS(分割转移法)构造一类不存在四环的(6075,5402)QC-LDPC码,并对其性能进行了仿真,仿真结果表明该准循环码可以达到与同等长度下随机码相同的性能。针对此结构,利用VHDL编程实现了编译码过程,并验证了其正确性,与随机LDPC码相比实现复杂度与难度大大降低。
In order to reduce the complexity and difficulty of LDPC codes with longer code length in random structure, a class of (6075,5402) QC-LDPC codes without quadrilaterals is constructed by using PS (Split Transform), and its performance The simulation results show that the quasi-cyclic codes can achieve the same performance as the random codes with the same length. In view of this structure, using VHDL programming to achieve the coding and decoding process, and verify the correctness, compared with the random LDPC code to achieve the complexity and difficulty greatly reduced.