期刊
JOURNAL OF MARINE SCIENCE AND ENGINEERING
卷 11, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/jmse11020357
关键词
weak target enhancement; false target suppression; high resolution; broadband signal processing; passive sonar detection
This paper proposes a new algorithm framework, BM-SEED, to enhance the resolution and improve the weak target detection capability of BTRs. By using an improved sub-band peak energy detection algorithm, it extracts the peak features of target trajectories in CBF-based BTRs and enhances weak targets through time-spatial autocorrelation analysis. Simulations and sea-trial data evaluations show that this method can improve the resolution of BTR targets to 1 degree with a signal-to-noise ratio of -20 dB.
Bearing time record (BTR) is widely used in the field of passive sonar information processing for target detecting and tracking. One of its challenges is to obtain high-resolution beamforming power spectral to facilitate the directions estimating of arrivals, namely DOA estimating. This paper proposes a new algorithm framework Block Matching - Subband Extrema Energy Detection (BM-SEED) to supplement the resolution and enhance the weak targets of BTRs. It extracts the peak features of target trajectories within the conventional beamforming (CBF)-based BTRs by using an improved sub-band peak energy detection (SPED) algorithm, and then enhances the weak targets and suppresses the false-alarm targets through time-spatial autocorrelation analysis. Simulations and sea-trial data evaluations demonstrate that the method of this paper can enhance weak targets, eliminate the interferences of false targets and improve the resolution of BTR targets to 1 degree under -20 dB.
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