一种基于循环互相关的非相干源信号方向估计方法

A cyclic cross-correlation based direction-of-arrival estimation approach

给出了基于循环互相关运算的阵列信号模型,根据该信号模型,运用MUSIC算法得到了对空间非相干源信号方向进行估计的有效方法—CCC-MUSIC算法,定性的分析及仿真实验均说明了所给方法具有较好的抑制噪声和选择信号的能力。该算法将为利用天线阵列提取具有循环平稳特性的源信号方向这一问题提供较好的实现方法。

The problem of estimating the direction-of-arrival for source signals utilizing the cyclostationarity property is discussed in the paper. First, an array signal model based on cyclic cross-correlation is presented. According to the above signal model, a direction-of-arrival estimation method for source signals utilizing MUSIC algorithm—CCC-MUSIC is developed. The results of a qualitative comparison with conventional MUSIC algorithm and computer simulation indicate simultaneously that the CCC-MUSIC algorithm shares the better performance in noises suppressing and signal selectivity, which provides an efficient approach for the direction-of-arrival estimation of cyclostationary source signals.