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Table 1 The method steps of this article

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)