一种分布式信号源的参数估计算法

An Approach on Parameters Estimation about Distributed Source

在信号源具有分布特性时,使用点源模型进行参数估计会产生较大误差,而广义的高分辨率算法又带有较大的运算复杂度,难以满足实时性很高的要求,且都需要预先知道角度分布的具体函数。该文提出了基于天线阵列的特殊结构,采用阵列之间互相关算法对相干分布式信号源的各项参数进行估计,极大地减小了运算量,同时分析了信号源到达方向的模糊性问题。仿真结果证明该方法对相干式分布源参数估计的有效性。

During parameters estimation of the distributed source, there are many errors if it is modeled as a point case in space. The generalized high resolution algorithms, estimating the distributed source parameters, normally demand complex computation, and the angular distributed function is known. To reduce the computational complexity greatly, the correlation algorithm is proposed for the coherent distributed source parameters estimation using the special geometry structure of signal receiving antenna array, and the ambiguity of DOA estimation is also analyzed. Computer simulation testifies the validity of this algorithm.