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A related signal source of a single vector water hearing device

A technology for coherent signal and orientation estimation, which is applied in the fields of instrumentation, computing, electrical digital data processing, etc., and can solve problems such as being unsuitable for orientation estimation.

Active Publication Date: 2018-12-07
HARBIN ENG UNIV
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Problems solved by technology

Compared with the dimensionality reduction algorithm, the biggest advantage of this type of algorithm is that the degree of freedom of the array remains unchanged, but this type of algorithm is often aimed at a specific environment, and is not suitable for the direction estimation of a single vector hydrophone coherent signal source

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  • A related signal source of a single vector water hearing device
  • A related signal source of a single vector water hearing device
  • A related signal source of a single vector water hearing device

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] Considering from another aspect, the method of the present invention is different from the traditional algorithm of realizing decoherence by restoring the rank of the signal covariance matrix, but starts from the received data, and first determines the weighted matrices of the two coherent signals in the three channels, according to The weighting matrix decomposes the received signal into two sub-signals, and then constructs the signal covariance matrix and estimates the orientation of one of the sub-signals. Since the weighting matrix of the two coherent signals contains the orientation information of the two signals, the orientation estimation of the two coherent signal sources can be realized.

[0026] The purpose of the present invention is achieved like this:

[0027] Step S1: Determine the weighted matrix of two coherent signals in the three cha...

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Abstract

The present invention discloses a single vector hydrophone based coherent signal source orientation estimation method. The method comprises the following steps of: determining a weighted matrix of two coherent signals in three channels, and decomposing a received signal into two sub-signals according to the weighted matrix; determining a MUSIC spectrum of the sub-signals as an objective function; and performing optimal search according to the objective function, and determining azimuth angles of two coherent signal sources. According to the single vector hydrophone based coherent signal source orientation estimation method provided by the present invention, by determining the weighted matrix of the two coherent signals in the three channels, separation of the two coherent signal sources is implemented, the problem of merging signal orientations into one under the condition of the two coherent signal sources of a single vector hydrophone is solved, and orientation estimation of the two coherent signal sources of the single vector hydrophone is implemented.

Description

technical field [0001] The invention belongs to the field of array signal processing. In particular, it relates to a method for estimating the direction of a coherent signal source based on a single-vector hydrophone. Background technique [0002] Compared with the sound pressure hydrophone, the vector hydrophone can measure the sound pressure and vibration velocity of the sound field at the same time and at the same point, obtain more sound field information, and rely on a single vector hydrophone to complete the estimation of the underwater target's azimuth. And there is no problem of multi-valued ambiguity. Therefore, in many application places with limited installation space, using a single vector hydrophone as a sonar receiver is a relatively popular and very practical engineering application in the field of underwater acoustics. [0003] Estimation of coherent signal sources has always been a research hotspot in spatial spectrum estimation. For the acoustic pressure...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 李秀坤马艳吴玉双刘彩红王功兵
Owner HARBIN ENG UNIV
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