差分跳频最大似然序列检测及其性能分析  

Maximum-likelihood-sequence-detection in DFH with its characteristics

作　　者：关胜勇[1] 姚富强[1] 

机构地区：[1]总参第63研究所,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2006年第1期6-10,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：为了在差分跳频接收机中使用最大似然检测算法,通过引入频率可靠度函数生成了多普勒平面上的广义星座图,构造了差分跳频最大似然算法。广义星座图不仅使差分跳频接收机最大似然序列检测成为可能,而且适用于采用频率来荷载信息的通信系统的符号或序列检测。仿真表明,差分跳频最大似然序列检测算法比采用逐跳检测的最大后验概率算法性能优越。In order to apply the maximum-likelihood-detection algorithm （MLDA）, the generalized constellation in Doppler＇s plane were proposed by introducing the frequency reliability function. The generalized constellation makes MLDA possible and can be applied to demodulation of frequency-shift-keying communication system. Simulations show that MLDA provides better performance than that of the most-aposteriori-possibility detection hop by hop in DFH.

关 键 词：差分跳频 扩频通信 最大似然序列检测 

分 类 号：TN914[电子电信—通信与信息系统]