IEEE802.11n的LDPC译码器中移位器的分析  

Analysis on shifter of LDPC decoder based on IEEE802.11n

作　　者：向兵[1] 王孟禄[1] 张少辉[1] 

机构地区：[1]河南大学物理与电子学院,开封475004

出　　处：《重庆大学学报（自然科学版）》2014年第7期125-130,共6页Journal of Chongqing University

基　　金：国家青年科学基金资助项目(11103002)

摘　　要：对基于IEEE802.11n点的LDPC译码器中SRSN移位器结构进行了改进,即在第二级加入了选择端"sel"用于实现双向移位功能。最后在并行度为81,normalized BP-Based译码算法,定点字长7bits优化的情况下对三QSN、SRSN以及改进的移位器进行了综合仿真,仿真表明,改进的移位器无论从在面积、功耗、时延,还是在占有硬件资源率方面几乎不增加的情况下,增加了支持双向移位功能,具有很强的灵活性。SRSN shifter structure of LDPC decoder for IEEE802.11n is improved. In the second level, the select port ＂sel＂ is added to implement hi-directional shift function. A DC simulation on the three shifters of QSN,SRSN and the improved shifter is conducted in the condition of the normalized BP-Based decoding algorithm,fixed word length of 7 bits and the degree of parallelism of 81. The simulation shows that the modified shifter does little increase in the aspects of area,power,delay,and hardware resources,and adds a function for hi-directional shift,which has very strong flexibility.

关 键 词：译码器 低密度奇偶校验码 移位器 802.11n 

分 类 号：TN919.5[电子电信—通信与信息系统]