Abstract:

Firstly, a two-dimensional (2-D) angle estimation method for multiple input multiple output (MIMO) radar with L-shape arrays based on direction of arrival (DOA) matrix is proposed. This method divides the 2-D virtual plane array which is generated by the MIMO radar into two overlapping subarrays, and constructs an estimation matrix to estimate the 2-D angles. To solve the problem of angle annexation, a joint diagonalization DOA matrix method is proposed later. This method generates four subarrays from the 2-D virtual plane array, and uses the joint diagonalization algorithm to estimate the 2-D angles. The proposed method secures the advantages of the existing DOA matrix method such as no requirement of 2-D angle search and autopairing of parameters, avoids the angle annexation problem, reduces the loss of the array aperture, and improves the performance of the angle estimation effectively. The computer simulation results demonstrate the effectiveness of the proposed method.