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A Multi-target Positioning and Recognition Method Based on Array Signal

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

Active Publication Date: 2021-10-22
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A Multi-target Positioning and Recognition Method Based on Array Signal
  • A Multi-target Positioning and Recognition Method Based on Array Signal
  • A Multi-target Positioning and Recognition Method Based on Array Signal

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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 method for multi-target positioning and recognition based on array signals. The method includes: a method for multi-target positioning and recognition based on array signals. The method includes: step 1) processing N independent The source is separated from the aliasing signal; step 2) decomposes the frequency band of the multi-channel array signal to separate M signals of different frequency bands; the space plane is divided into P*Q grids, and P is the row of the grid The total number, Q is the total number of columns of the grid; step 3) using the sound source localization algorithm of array signal processing to calculate the output power of M frequency bands at each grid position; step 4) each grid based on step 3) The power of the M frequency bands, the signal of each grid is restored to the time domain, and the time domain signal on each grid is obtained; step 5) each independent source of step 1) is respectively compared with P*Q time domain Domain signals are matched, and the matched grid position is the position of the independent source, and a total of P*Q*N times are matched.

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 Patents(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