An Esprit Parameter Estimation Algorithm Based On Non-Circular Signal For Mimo Radar

In this paper, a method of parameter estimation based on Non-Circular Signal via two-dimensional ESPRIT algorithm for MIMO radar is proposed. The algorithm considers the characteristic of the maximum non-circularity signal, and utilizes not only the covariance matrix but also the pseudo-covariance matrix to obtain the data matrix of the non-circular signal. This algorithm expands the received signal data matrix by data recombination, which increases the number of effective array elements of MIMO radar and improves the utilization of echo information. Then the parameter estimates are obtained by using the two-dimensional ESPRIT algorithm. Compared with the ESPRIT algorithm developed in other references, this algorithm has higher accuracy of parameter estimation in the case of lower signal-to-noise ratio or fewer array elements. Meanwhile, the algorithm can improve the accuracy of parameter estimation when the targets are close together. Simulation results indicate that the proposed algorithm improves the performance significantly.