基于多项式聚焦矩阵的宽带信号到达角估计性能分析

Analysis of Direction of Arrival Estimation of Wide-Band Signal Based on Polynomial Focuse-Matrix

摘要:

对宽带信号采用基于多项式聚焦矩阵的方法进行到达角估计,并进行了计算机仿真。计算机仿真表明,多项式聚焦矩阵具有计算量小、抗噪性好、能对相干信号进行到达角估计的优点,但需要满足阵元间距远小于信号半波长的条件。当阵元间距不满足该条件时,会引入较大的估计误差。

Abstract:

The method of direction of arrival(DOA) estimation of wide-band signal by polynomial focuse-matrix and computer simulation was carried out. The simulation result showed that, the method of polynomial focuse-matrix had such excellence as less calculation, good noise immunity. And it could also be applied to DOA esti. mation of coherent wide-band signals. But the condition of that the array distance was far less than the signal’ s half wave-length needed to be satisfied. If the condition of array distance was not satisfied, it would produce estimation error.