High-resolution low-sidelobe deconvolution spectrum estimation method based on space-time processing
A deconvolution, high-resolution technology, applied in the field of array signal processing and signal processing, can solve the problems of not very deep, joint spatio-temporal processing in the field of sonar array signal processing theoretical research and applications, etc., to improve the impact, suppress The effect of side lobes and breaking the Rayleigh limit
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[0034] Below in conjunction with accompanying drawing, the method that invention provides is described further:
[0035] (1) Obtain a section of received signal. Assume that the receiving base array is a one-dimensional uniform linear array, the number of array elements is M=50, and the uniform linear array is placed in water, and the sampling rate is f s =5kHz, the speed of sound in water is c=1500, and the distance between array elements is d=(c / f 0 ) / 2, where f 0 =200Hz is the frequency of a sound source, assuming that the sound source is incident on the sensor array in the form of a plane wave, and the incident direction is sinθ 0 = 0.5. In addition, there are two frequencies f 1 = 205Hz and f 2 = 210Hz sound source, incident azimuths are sinθ 1 = 0.5 and sin θ 2 =-0.1, the time length is T=1 second. The received signal in two cases is simulated here: the array received signal without noise; the signal-to-noise ratio of the three sound sources is SNR 0 =10dB, SNR ...
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