New DOA estimation based on coprime array MIMO radar
Chuantang Ji, Fei Zhang · 2021 China Automation Congress (CAC) · 2021
Traditional co-prime array DOA estimation methods have problems such as small array aperture and phase ambiguity. A new high-resolution DOA estimation method based on co-prime MIMO radar is proposed. It performs conjugate reconstruction of the array model of the received signal, makes full use of the non-circular characteristics of the non-circular signal, reconstructs the array model, increases the array dimension, and improves the estimation accuracy. The way of dimensionality reduction is introduced to further reduce the computational complexity. In this paper, the MIMO radar coprime array is used to increase the array aperture of the receiving array and eliminate the phase ambiguity problem in DOA estimation. Finally, the experiment verifies the effectiveness of the algorithm proposed in this paper.