EM-HMM多频率线跟踪算法  

EM-HMM Multiple Frequency Line Tracking Algorithm

作　　者：谢贤亚[1] 王家鼎 李焕润[2] 

机构地区：[1]上海大学自动化系,上海200072 [2]上海大学计算机系,上海200072

出　　处：《电子学报》2002年第1期22-26,共5页Acta Electronica Sinica

基　　金：国家自然科学基金 (No .69672 0 1 6)

摘　　要：基于隐马尔可夫模型的多频率线跟踪算法 ,能在很低的SNR环境下工作 ,但量化误差较大 ,和计算量大 .本文提出另一种选择量测向量和计算量测概率的方法 ,创造条件减小量化误差 .又经简单论证 ,将EM算法和HMM用于多频率线跟踪 ,严格地 (而不是启发式地 )得到EM HMM算法 ,可以极大地减少计算量 .本文又提出获得初始估计以启动EM HMM算法的二种方法 .仿真计算表明 。The HMM based multiple frequency line tracking algorithms of work well under very low SNR,except for a high complexity of computation and for generally unnegligible quantization error.In this paper a new choice of measurement vector and the corresponding computation of measurement probability are presented to reduce the quantization error.And to reduce the computation burden,the idea of the EM algorithm is applied to the multiple frequency line case and the EM HMM tracking algorithm is naturally developed.Finally,two methods for initializing the EM HMM algorithm are presented.Simulations show that all these are effective.

关 键 词：多频率线跟踪算法 隐马尔可夫模型 EM-HMM算法 

分 类 号：TN911.7[电子电信—通信与信息系统]