基于虚拟阵列孔洞插值的互质阵列直接定位方法

Direct Position Determination of Coprime Array Based on Hole Interpolation of Virtual Array

针对基于互质阵列的直接定位方法对于虚拟阵元非连续部分利用率不高的问题,提出了一种基于虚拟阵列孔洞插值的互质阵列直接定位方法。该方法采用互质阵列建立信号接收模型,引入虚拟阵列孔洞插值的思想来构造对应的协方差矩阵,最后利用空间谱技术求解定位结果。仿真结果表明,该方法与基于最大连续虚拟阵列的直接定位方法相比,在少快拍数、低信噪比环境下提高了分辨率和定位精度,具有很高的鲁棒性。

Aiming at the problem that the Direct Position Determination(DPD)method based on coprime array has low utiliza⁃tion rate for discontinuous parts of virtual array elements,this paper proposes a DPD method based on virtual array hole interpola⁃tion.In this method,the coprime array is used to establish the signal receiving model,and the idea of virtual array hole interpolation is introduced to construct the corresponding covariance matrix.Finally,the spatial spectrum technology is used to solve the position⁃ing results.Simulation results show that compared with the DPD method based on the maximum continuous virtual array,this meth⁃od improves the resolution and positioning accuracy in the environment of less snapshots and low signal-to-noise ratio,and has good robustness.