关键词: 阵列信号处理, 波达方向估计算法, 扩展传播算子, 实值算法, 内插阵列变换

Abstract: A real-valued extended propagator method algorithm based on virtual interpolated array named VIA-EPM real-valued algorithm was proposed to solve the utilization of Virtual Interpolated Array (VIA) in the non-circular Direction Of Arrival (DOA) algorithm. The real array output was virtually transformed by utilizing transformation matrix which was obtained through the real array manifold and virtual array manifold. The real part and imaginary part of the transformed array output were obtained, which could be reconstructed in series to extend dimensions according to the characteristic that the signal sources are real-valued, and then a Propagator Method (PM) DOA estimation algorithm was obtained after splitting the extended array output matrix. The simulation results show that, if sensor position errors exist, the performance of the new algorithm is similar to the calibrated extended propagator method real-valued algorithm (EPM real-valued algorithm) by using VIA for the calibrated sensor position data, and this algorithm also keeps the performance in array extension, high accuracy and high resolution, and the performance of the new algorithm is obviously better than the non-calibrated EPM real-valued algorithm in the case of two-dimension sensor position errors. Analysis of the computational complexity of VIA-EPM real-valued algorithm concludes that the new algorithm has the advantage of virtual interpolated array and non-circular characteristic, and its computational complexity is much lower than complex-valued algorithm.

Key words: array signal processing, Direction Of Arrival (DOA) estimation algorithm, extended propagator, real-valued algorithm, Virtual Interpolated Array (VIA)