DOA estimation method in co-prime array based on iteration sparse reconstruction
A sparse reconstruction and DOA technology, applied in the field of DOA estimation based on iterative sparse reconstruction, can solve the problems of undetectable transmission power, difficulty in estimating performance, and affecting the effect of reconstruction, etc., to achieve low transmission power and improve estimation Accuracy and resolution, the effect of increasing the degree of freedom
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[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings:
[0027] The flow chart of the method of the present invention is as figure 1 As shown, the specific implementation process is as follows:
[0028] (1) Construct a nonlinear coprime array model to obtain the received signal;
[0029] (2) Calculate the covariance matrix of the received signal and perform vectorization processing to establish a virtual difference array;
[0030] (3) Rasterize the angle domain to establish a sparse optimization problem;
[0031] (4) Dynamically adjust the grid point position in an iterative manner until the termination condition is met. Analyze the sparse solution and determine the final direction of arrival.
[0032] The process of the DOA estimation method of the present invention is as follows:
[0033] 1. Coprime array and its receiving signal
[0034] The relative prime array involved in the present invention is such as figure 2 As show...
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