Journal of Northeastern University(Natural Science) ›› 2024, Vol. 45 ›› Issue (10): 1401-1408.DOI: 10.12068/j.issn.1005-3026.2024.10.005

• Information & Control • Previous Articles    

Sea-Surface Weak Target Detection Method Based on SPWVD-STFT

Yi CHENG1,2, Yang WANG1()   

  1. 1.School of Control Science and Engineering,Tiangong University,Tianjin 300387,China
    2.Tianjin Key Laboratory of Intelligent Control of Electrical Equipment,Tiangong University,Tianjin 300387,China.
  • Received:2023-05-22 Online:2024-10-31 Published:2024-12-31
  • Contact: Yang WANG
  • About author:WANG Yang,E-mail: wangyang990327@163.com

Abstract:

To further improve the capability of time?frequency domain features to detect weak targets on the sea?surface, a smoothed pseudo Wigner-Ville distribution (SPWVD)-short?time Fourier transform (STFT) sea?surface weak target detection algorithm is proposed. Firstly, STFT is adopted to perform time?frequency features analysis on the echo signals, and to optimize the time?frequency features analysis results of SPWVD. The K-medoids clustering algorithm is introduced to denoise the time?frequency matrix. Then, the time?frequency features Doppler frequency stability (DFS) is extracted, and the fast convex hull learning algorithm is utilized to obtain the false alarm controllable judgment region, so as to determine the sea clutter and the target. Finally, results of experiments based on Ice multiparameter imaging X-Band radar (IPIX) measured data show that the detection probability of the proposed detection algorithm is 6.3% higher than that of the time?frequency tri?feature detector at the same false alarm rate.

Key words: sea clutter, weak target detection, time?frequency analysis, K-medoids clustering, convex hull detector

CLC Number: