基于凸集投影的水声信道辨识算法

研究了使用凸集投影方法进行水声信道辨识的可行性,给出了凸集投影常用的凸集约束的条件,并推导了在复数域中的凸集约束的表达式。计算机仿真和实验结果证明,在较高信噪比的情况下,使用凸集投影方法可以正确估计水声信道中的多途幅度衰减和相位变化,其分辨率优于传统最大似然估计器-匹配滤波器,可作为研究水声信道的有力工具。

Underwater acoustic channel identification based on projection onto convex sets

The feasibility of applying the projection onto convex sets to identifying the underwater acoustic channel is discussed. Then several useful constraints as convex sets are given in complex field. And the corresponding projection operators are obtained. Simulation and experimental results show that, when signal to noise ratio is high enough, the amplitude attenuation and phase change of the underwater acoustic channel can be estimated by using this method. The resolution is dearly higher than the match filter which is the classical maximum likelihood estimator. This method can be used for studying the property of the underwater acoustic channel.