Study of Underwater Target Recognition for Torpedo Electromagnetic Fuse with High Detecting Precision

doi:10.3969/j.issn.1000-1093.2015.01.018

Abstract

Abstract: Characteristic information is hidden in the received signal of active torpedo electromagnetic fuse. The conventional burst controlling strategies based on energy-comparison are affected by ambient and electromechanical noises. The improved algorithms based on digital signal processing techniques are proposed. The received signals are first processed by all-phase compensation method to eliminate the direct coupling component, and then the residual signal is demodulated using STFT. An improved polynomial least mean square approximation method, which reduces the computation time, is presented for eliminating the side-effects brought by noise. A parametric estimation model base on bell-shape impulse is used to estimate the maximum of echo envelope. Simulation and trial data show that the proposed algorithm is effective and practical.

Key words: ordnance science and technology, short-time Fourier transform, polynomial, least mean square approximation, envelope demodulation

CLC Number:

TJ431.7

CHEN Bin-qiang， LYU Shu, YAO Bin, ZHANG Zhou-suo, BAI Zhi-ke. Study of Underwater Target Recognition for Torpedo Electromagnetic Fuse with High Detecting Precision[J]. Acta Armamentarii, 2015, 36(1): 122-129.

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