| Citation: | CHEN Geng, TIAN Bo, GONG Jian, et al. SA&M-Relax target DOA estimation method for passive radar[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(6): 1254-1260. doi: 10.13700/j.bh.1001-5965.2020.0137(in Chinese)
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Due to the low signal-to-noise ratio of echo in passive radar, the target angle is usually estimated after range-Doppler 2D correlation. In this case of single snapshot, the performance of the classical super resolution method is poor due to the non-positive nature of the covariance matrix. To solve this problem, based on the A&M interpolation iterative algorithm (iterative frequency estimation by interpolation on Fourier coefficients algorithm), the SA&M-Relax passive radar target DOA estimation method suitable for sparse array is proposed.In the case of the same number of sensors, the resolution and precision of the target angle estimation are improved compared with the original algorithm, and the computation amount is reduced. Finally, the effectiveness of the proposed algorithm is verified by simulation experiments.
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