摘要
研究了美国喷气推进实验室向CCSDS建议的最新标准中关于深空通信的LDPC码编码技术;首先对编码算法进行了讨论,利用矩阵环与多项式环的同构关系,以及扩展的欧几里德算法,得到了计算准循环生成矩阵的方法;其次,针对准循环矩阵的特点,提出了一种新的基于反馈移位寄存器的编码电路;最后,利用XC4V LX40 FPGA,分别实现了资源优化的全串行编码电路和速度优化的并行编码电路。
Low-density-parity-check（LDPC） codes which were proposed by JPL in the latest CCSDS standard for deep space communication is investigated.Firstly,the encoding algorithm is studied.The method for computing quasi-cyclic generator matrix is derived from isomorphism between matrix ring and polynomial ring and extended Euclid＇s algorithm.Secondly,according to the characteristics of quasi-cyclic matrix,a new encoding circuit using feedback shift registers is proposed.Last,sequential encoding circuit with resourse optimization and parallel encoding circuit with speed optimization are implemented based on XC4V LX40 FPGA.
出处
《计算机测量与控制》
CSCD
北大核心
2011年第5期1199-1202,共4页
Computer Measurement &Control
关键词
深空通信
LDPC码
准循环
反馈移位寄存器
deep space communication
LDPC code
quasi-cyclic
feedback shift register
