莱斯信道的MLSD技术研究  

Research on MLSD Techniques in Racian Channel

作　　者：王晓林[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电通信技术》2013年第6期15-17,共3页Radio Communications Technology

摘　　要：主要研究在时变多径衰落信道下,基于Viterbi算法的最大似然序列检测技术(MLSD)。为了解决MLSD信道估计问题,使均衡器能够及时跟踪信道的变化,提出了基于逐幸存处理(PSP)和最小存活路径(MSP)的MLSD算法。在莱斯信道环境下,对上述算法进行了仿真。仿真结果表明,将RLS-MSP算法与减状态MLSD算法相结合的信道均衡技术具有对复杂信道的强跟踪能力,同时保证了较高的均衡性能和合理的复杂度。The maximum likelihood sequence detection technique（MLSD） based on Viterbi algorithms is mainly studied in the timing variable multipath fading channel. In order to solve the problem of MLSD channel estimation and make the equalizer be able to track timely the change of channel,this paper brings forward MLSD algorithms based on PSP and MSP. In the Racian channel environ- ment, the simulations are done for the above algorithms. The simulation results show that the channel equalizer technique based on RLS-MSP and reduce state MLSD algorithms has strong tracking capability on complex channel,and assures high capability of equalization and reasonable complexity.

关 键 词：衰落 均衡 信道估计 信道跟踪 

分 类 号：TN911[电子电信—通信与信息系统]