基于辅助阵元法的非圆信号实值MUSIC算法

MUSIC algorithm about real values for noncircular signals based on instrumental sensors

针对非圆信号波达方向(direction of arrival,DOA)估计算法在工程应用中受阵列误差影响的问题,基于辅助阵元法的基本原理,并结合非圆信号的特征提出了一种基于辅助阵元法的非圆信号实值多重信号分类(multiple signal classification,MUSIC)算法。该算法利用非圆信号输出阵列的实值扩展方式,既提高阵元输出信号的使用率,也减少算法的计算量。同时详细推导了获取信号DOA估计的数学表达式,并对所提算法进行了仿真实验。实验结果验证了该算法的有效性。

As array errors affect the precision of direction of arrival （DOA） estimation, a multiple signal classification （MUSIC） algorithm for noncircular signals about real values for noncircular signals based on instrumental sensors is proposed, which combines the basic principle of the instrumental sensor method （ISM） and the characters of noncircular signals. This new algorithm that uses the real value of the non-circular signal output arrays extending mode not only improves utilization of the array output signals, but also decreases the calculation amount. A mathematical expressions about obtaining the signal DOA estimation are derived and a simulation is made. And the results of the algorithm simulation verify the superiority of the algorithm.