Abstract：At low signal-to-noise ratio (SNR), in allusion to the problem that the beam-forming bearing/time recording (BTR) displays badly, a pre-processing approach based on reset covariance matrix for beam-forming is developed. This method is according as the characteristic that compared with other elements, main diagonal elements contain more noise and same signal in covariance matrix, then utilizes the absolute value of main diagonal neighboring elements displace the value of main diagonal elements for covariance matrix. This method reduces the impact of the main diagonal elements containing noise on BTR, and improves the BTR display effect. Results of computer simulation and sea-experiment show that this method doesn’t affect BTR display effect at high SNR, and can well improve the bearing/time recording display effect at low SNR, and can be combined with other post-processing techniques farther improving the BTR display effect. This method provides a reference for improving the BTR display effect.
郑恩明1，张恩宾2，陈亚2，孙长瑜1，陈新华1，余华兵1. 一种基于重置协方差矩阵的波束形成优化方法[J]. 振动与冲击, 2015, 34(17): 185-190.
ZHENG Enming1, ZHANG En bin2，CHEN Ya2, SUN Changyu1, CHEN Xinhua1, YU Huabing1. An optimization approach based on reset covariance matrix for beam-forming. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(17): 185-190.
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