一种高效的LDPC编码器的DSP设计与实现  

Efficient Encoding of LDPC Codes Based on DSP

作　　者：陈蓉[1] 汪一鸣[1] 

机构地区：[1]苏州大学电子信息学院,江苏苏州215021

出　　处：《通信技术》2008年第7期44-46,共3页Communications Technology

基　　金：国家自然科学基金资助项目(60572075)

摘　　要：目前,大多数LDPC编码器采用的是FPGA实现,文中根据Richarson和Unbanke提出的有效编码算法,具体分析了基于该算法的编码器在DSPs上的设计思路,并联合考虑校验矩阵的存储与运算,给出了一种高效的存储方式和矩阵向量乘法的计算方法。此外,结合DSPs的软件流水功能,对程序进行了优化,使实现编码所需的指令周期大幅减少,从而提高编码速率。Currently, most of the LDPC encoders are implemented by FPGA. According to the efficient encoding algorithm proposed by Richarson and Unbanke, this paper analyzes how to design a LDPC encoder based on DSPs. By jointly considering the storage and operation of check matrix this paper presents an efficient way to store and calculate matrix. In addition, based on the pipeline function of DSPs, the optimization is done on the encoding program and the encoding speed thus improved greatly.

关 键 词：低密度奇偶校验码 矩阵存储 矩阵向量乘法 数字信号处理器 

分 类 号：TN911.22[电子电信—通信与信息系统]