一种伪随机LDPC码构造方法与性能研究

低密度校验(Low-Density Parity-Check)码作为迄今为止性能最好的纠错码之一， 目前已经被许多数字通信标准广泛采用。伪随机低密度校验码(Pseudo-Random)是 LDPC 码的一个子类，已被应用于空间通信和无线网络技术。本文给出了一种基于有限域的伪随机 LDPC 码构造方法，并采用理论分析和仿真结果分析相结合的方法，对伪随机 LDPC 码的构造和编译码方法进行了研究，并给出了实现中适合的译码算法及量化方案。

Construction Method and Its Performance of Pseudo-Random LDPC Code

Low-density parity-check (LDPC) codes as the best performance of the error control codes, has been widely used in many digital communication standards. Pseudo-Random LDPC is a subclass of LDPC codes, which has been used in space communication technology and Wireless network. A construction method of pseudo-random LDPC code based on finite field is presented in this article, with theoretical analysis and simulation. The construction of pseudo-random LDPC code and the encoding and decoding are studied, and the available decoding algorithm and the quantization scheme are given.