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本文构造了两类部分平衡不完全区组设计。并利用它们构造了一类低密度校验码(LDPC码),其最小环长至少为6,码率的选取具有很大的灵活性,而且可以具有拟循环结构。计算机仿真结果表明这种方法构造的LDPC码,在加性高斯白噪声信道中BPSK调制下用和积迭代译码性能很好。
In this paper, two types of partially balanced incomplete block design are constructed. And use them to construct a kind of low density parity check code (LDPC code), the minimum ring length of at least 6, the rate of choice has great flexibility, and can have a quasi-loop structure. Computer simulation results show that LDPC codes constructed by this method perform iterative decoding with sum of products under BPSK modulation in additive white Gaussian noise channel.