基于2比特差分的GMSK信号解调算法  

Demodulation Algorithm Based on Two Bit Differential Detection for GMSK Signals

作　　者：吴团锋[1] 

机构地区：[1]解放军理工大学通信工程学院研究生2队,江苏南京210016

出　　处：《军事通信技术》2002年第1期35-40,共6页Journal of Military Communications Technology

摘　　要：为了更好地挖掘 GMSK信号差分解调本身的性能 ,文中给出了 2比特差分相位检测 (DPD)结合软输出维特比算法 (SOVA)的解调方案。定义了等效最小平方欧氏距离 ,虽然它不能得到最大似然序列 ,但仍是一种简单可行的方法且有很好的性能 ,同时给出了简要的求解过程 ,计算结果表明 2比特 DPD可以得到最大的等效最小平方欧氏距离 。In order to explore the potential performance of differential detection of GMSK signals, a new scheme using two-bit differential phase detction (DPD) combined with the soft-output Viterbi algorithm (SOVA) is presented in this paper. Equivalent minimum squared Euclidean distance is defined. Although the distance does not lead to maximum-likelihood sequence, it is a simple method and produces good result. The procedure of calculating the distance is presented, and the result shows that 2-bit DPD has the largest distance. The new scheme can get better bit error rate(BER) performance proved by simulation results.

关 键 词：差分相位检测 GMSK 信号解调算法 

分 类 号：TN911.3[电子电信—通信与信息系统]