阵列信号建模和波达方向估计方法

Researches on modeling and DOA estimation of array signals

建立了均匀线阵和均匀圆阵模型,构造阵列接收信号的自相关矩阵,并用MUSIC算法得到来波方向估计.分别以1个信号、2个信号和3个信号的均匀线阵和均匀圆阵为例,通过MATLAB编程进行仿真实验.结果表明,来波方向的估计值与真实值之间的误差很小,证明了MUSIC算法用于来波方向估计的实用价值.总结了阵列信号处理中的几个关键技术和存在的问题.

The models of uniform linear array and uniform circular array were established.The autocorrelation matrix of the signals received by array was deduced,and the DOA(Direction of Arrival)estimation of the signals received by array is obtained using MUSIC algorithm.Taking the uniform linear array and uniform circular array receiving one,two and three signals as examples,their DOA estimations are obtained by simulation experiments.It is shown that there is little error between the estimated value and real value of DOA,which proves the feasibility of applying MUSIC algorithm to the DOA estimation.Some difficulties encountered in array signal processing and corresponding suggestions are presented.