From: Non-circular signal DOA estimation based on coprime array MIMO radar
Step1: Firstly construct the MIMO radar transceiver coprime array model; |
Step2: Construct the received signal X(t) from the coprime array model; |
Step3: By formula (10), the receiving matrix is expanded and reconstructed by using the characteristics of non-circular signals to obtain formula (12); |
Step4: Solve the covariance matrix R of the reconstructed received signal by formula (12), and perform eigenvalue decomposition on the covariance matrix to obtain the noise subspace En; |
Step5: Construct a two-dimensional spectral peak search function (16), and then perform dimensionality reduction processing; |
Step6: Reconstruct in formula (16) and transform it into a secondary optimization problem; |
Step7: Construct a cost function. Use formulas (24) and (25) to find the optimal solution and get the corresponding \(\hat{\theta }\); |
Step8: Formula (30) can be obtained by Q(θ), and Q(θ) can be corrected by formula (31); |
Step9: Finally, the DOA estimated value is obtained from formula (33) |