Underwater target DOA estimation method based on active virtual time reversal method
An underwater target and time-reversal technology, applied in radio wave reflection/re-radiation, using re-radiation, measuring devices, etc., can solve problems such as direct promotion of direction estimation, reduce energy attenuation, and improve signal-to-noise ratio Effect
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[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.
[0038] The invention applies the ADVTR method to the direction of arrival estimation of the target, proposes an ADVTR-based Capon target DOA estimation method, and intends to solve the DOA estimation problem of the underwater target under the background of multipath and low signal noise. Simulation results show that under the same SNR condition, the proposed active virtual time anti-DOA method can obtain better estimation results than conventional methods, especially in low SNR conditions.
[0039] The first step: the uniform line array is located in the PS (probing sound source) emission signal of the k array element
[0040] According to the ray theory, the channel transfer function between the emitting sound source and the target is set as:
[0041]
[0042] where N ...
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