瑞利衰落信道下基于生成矩阵的LDPC性能研究

Research on LDPC Performance Based on Generation Matrix in Rayleigh Fading Channel

LDPC码是一种具有稀疏校验矩阵的分组纠错码。LDPC码作为高传输速率通信系统的信道编码,具有吞吐量大、高速译码速率和较低错误率的优点,但存在编码复杂度较高和编码时延较长的缺点。笔者针对LDPC码进行改进,设计一种基于生成矩阵构造的LDPC码,从而实现线性编码,并通过仿真研究其在瑞利衰落信道下的性能,得出系统的误码率曲线。

The LDPC code is a grouping error correction code with a sparse verification matrix. LDPC code, as a channel code for high-transmission rate communication systems, has the advantages of high throughput, high speed decoding rate and low error rate, but it has the disadvantages of higher encoding complexity and longer encoding delay. Based on the improvement of LDPC code, the author designs an LDPC code based on the generation matrix construction to realize linear coding, and studies its performance under the Rayleigh fading channel through simulation to obtain the BER curve of the system.