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Multi-target positioning identification method based on array signals

A multi-target positioning and array signal technology, applied in the field of speech signal processing, can solve the problems of the sound source being unable to distinguish its position, one-to-one correspondence, unable to establish sound source and position, etc.

Active Publication Date: 2020-03-17
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

Traditional DOA estimation methods, such as the sound source localization method with steerable power response (SRP-PHAT), can only estimate the position of the sound source, but cannot distinguish the position of the sound source with similar frequency, that is, the relationship between the sound source and the position cannot be established. one-to-one relationship

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  • Multi-target positioning identification method based on array signals
  • Multi-target positioning identification method based on array signals
  • Multi-target positioning identification method based on array signals

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] The invention provides a multi-target positioning and recognition method based on array signals, the method comprising:

[0032] Step 1) Use array blind signal processing to combine N independent sources s 1 (t), ... s N (t) separation from aliased signals;

[0033] Using the natural gradient method for iterative calculation, the algorithm makes the following assumptions: the signal s with N independent signal sources 1 (t), ... s N (t) and observations x of L independent channels 1 (t),...x L (t) (known), the observed quantity and the signal source have the following relationship:

[0034] x(t)=As(t)

[0035] where x(t)=[x 1 (t),...x L (t)] T , s(t)=[s 1 (t), ... s N (t)] T , A is an N×L coefficient matrix, the original problem becomes the problem of estimating s(t) given the independence of x(t) and s(t). Assume the fol...

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Abstract

The invention discloses a multi-target positioning identification method based on array signals. The method comprises steps that step 1) N independent signal sources are separated from aliasing signals by utilizing array blind signal processing; 2) frequency band decomposition of multi-channel array signals is performed, and M signals with different frequency bands are separated out; a space planeis divided into P*Q grids, P is the total number of rows of grids, and Q is the total number of columns of the grids; 3) the output power of the M frequency bands at each grid position is respectively calculated by using a sound source localization algorithm of array signal processing; 4) based on the power of the M frequency bands of each grid in the step 3), the signal of each grid is recoveredto a time domain, and a time domain signal on each grid is obtained; and 5) each independent information source in the step 1) is matched with P*Q time domain signals, the matched grid position is the position of an independent information source, and P*Q*N times of matching are carried out in total.

Description

technical field [0001] The invention relates to the field of voice signal processing, in particular to a multi-target positioning and recognition method based on array signals. Background technique [0002] Microphone array signal processing technology is derived from radar, sonar and other systems. Microphone array sound source localization has wide application value in many fields such as communication, mobile robot and hearing aid device. In these applications, the most basic thing is to estimate the position of the sound source, and it is necessary to take into account the positioning accuracy and the real-time performance of the algorithm. Traditional DOA estimation methods, such as the sound source localization method with steerable power response (SRP-PHAT), can only estimate the location of the sound source, but cannot distinguish the location of the sound source with similar frequency, that is, the relationship between the sound source and the location cannot be es...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 理华孟晓辉王耀辉
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI