基于MLSE算法的GMSK均衡解调  

MLSE algorithm for synchronous channels in GMSK

作　　者：肖露[1] 李波[1] 陈文艺[1] 陈瑞[1] 

机构地区：[1]西安邮电学院通信与信息工程学院,陕西西安710121

出　　处：《西安邮电学院学报》2011年第6期46-49,共4页Journal of Xi'an Institute of Posts and Telecommunications

摘　　要：为了克服高斯滤波最小频移键控(Gaussian Filtered Minimum Shift Keying,GMSK)调制信号经过移动通信传输后存在的码间干扰,利用信道中已知训练序列的伪随机性,进行信道同步和信道估计,经过匹配滤波和改进的Viterbi算法,使解调序列差错概率达到最小。以同步信道突发为例,研究基于最大似然序列估计(MaximumLikelihood Sequence Estimator,MLSE)均衡算法下的GMSK解调,并在JAKES信道下进行仿真,结果显示,这种MLSE均衡算法能很好的进行GMSK解调。In order to conquer the seriously inter-symbol interference among GMSK modulating signals when being transmitted by mobile communications,the pseudo-randomness of the training sequence known in the channel is used for channel synchronization and channel estimation.With the help of matched filter and Viterbi algorithm,the demodulation sequence error probability is minimized to the least.In terms of synchronization channel burst,GMSK demodulator based on MLSE equalization algorithm is analyzed.An experiments with JAKES channel is done,and the simulation results show that,MLSE equalization algorithm works well for GMSK demodulatiion.

关 键 词：高斯滤波最小频移键控 码间干扰 最大似然序列估计 信道估计 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]