| Citation: | FENG Xiaoyu, XIE Junwei, GE Jiaang, et al. Robust Capon beamforming based on frequency diverse array[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(4): 769-777. doi: 10.13700/j.bh.1001-5965.2018.0190(in Chinese)
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In order to overcome the defect that the phased array beam has only angular resolution, the two-dimensional range-angle correlation of the beam is realized by adding a very small frequency increment relative to the carrier frequency between the array elements in the frequency diverse array. Three kinds of reception signal processing mechanism were introduced, and the theoretical deduction and analysis were carried out. The simulation shows the practicability of the two mechanisms. Aimed at target steering vector estimation and real target steering vector mismatch problem in the presence of the pointing error, the closed solution of the corrected steering vector is given by using robust Capon beamforming(RCB) algorithm. And in the two kinds of signal processing mechanism, the beampattern is simulated. The simulation results show that the RCB algorithm can form a high gain in the target position and form a null in the interference position. The effectiveness of the algorithm in the frequency diverse array is verified.
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