适用于WiMAX标准的LDPC码的仿真分析

Simulation Analysis of LDPC Codes Based on WiMAX Standard

介绍了WiMAX中802.16e标准采用的结构化分块的LDPC编码技术,阐述了码的结构和编码方式。文中采用对数似然比置信传播作为译码算法,在AWGN信道条件下进行了仿真。仿真结果表明,LDPC码适合于大编码块的数据传输,满足WiMAX技术对物理层编码要求数据流量大,低误码率传输的要求。

This paper introduces the block structure Low Density Parity Check(LDPC) code in WiMAX 802. 16e standard and describes its structure and encoding method. In the condition of AWGN channel, Log Likelihood Ratio Based Belief Propagation (LLR-BP) decoding algorithm is used in simulation. The results show that the LDPC codes fit the data transmission of large coding block, and meet the demands of large data streams and low error rate in WiMAX physical layer.