Accurate two-dimensional direction of arrival estimation method with high resolution based on virtual domain tensor spatial spectrum search of coprime plane array

摘要

PROBLEM TO BE SOLVED: To disclose an accurate two-dimensional arrival direction estimation method with high resolution. SOLUTION: A coprime plane array is constructed. Received signal tensor modeling of the coprime plane array. Derivation of a virtual domain equivalent signal based on the quadratic cross-correlation tensor of the coprime plane array. Virtual domain Equivalent received signals of evenly spaced area arrays are constructed. Derivation of a fourth-order autocorrelation tensor for virtual domain smoothing signals. Achieve signal and noise subspatial classification based on multidimensional feature extraction of virtual domain autocorrelation tensors. It is an accurate two-dimensional arrival direction estimation of high resolution based on the virtual domain tensor spatial spectrum search. The present invention realizes accurate two-dimensional arrival direction estimation of high resolution based on tensor spatial spectrum search based on multidimensional feature extraction of virtual domain tensor statistics of coprime plane array, and is used for passive detection and target positioning. Can be done. [Selection diagram] Fig. 1