Method for estimating direction of arrival of known waveform information source based on distributed array

A direction of arrival estimation and distributed technology, applied in the field of signal processing, can solve the problems of low signal direction of arrival estimation accuracy, weak uniform linear array suppression capability, large angle estimation error, etc., and achieves improved accuracy and high angle resolution. , the effect of good estimation accuracy

Active Publication Date: 2021-11-26
XIDIAN UNIV
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Problems solved by technology

This method effectively solves the problem of large angle estimation error in the case of a small number of snapshots, but the disadvantage is that a uniform line array is used to receive the incident signal, and the small aperture characteristic of the uniform line array will cause the uniform line array to be less sensitive to interference, The suppression ability of noise and so on is weak, so that the estimation accuracy of signal direction of arrival is low

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  • Method for estimating direction of arrival of known waveform information source based on distributed array
  • Method for estimating direction of arrival of known waveform information source based on distributed array
  • Method for estimating direction of arrival of known waveform information source based on distributed array

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Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] refer to figure 1 , the present invention comprises the following steps:

[0035] Step 1) Construct the distributed array U:

[0036] Construct a distributed array U={U including M uniform linear arrays 1 ,U 2 ,...,U m ,...,U M}, each uniform linear array U m by N m composed of antenna elements, and put U m0 As a reference array element, the uniform linear array U m The distance between every two antenna elements in is d, where, M≥2, U m Represents the mth uniform linear array of the distributed array U, N m ≥2, U mn Indicates the uniform linear array U m The n+1th antenna element of , d≤λ / 2, λ is the wavelength of the narrowband signal incident to the array;

[0037] The structure of the distributed array receiving signal model in this embodiment is as follows figure 2 As shown, the distributed array U={U comp...

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Abstract

The invention provides a method for estimating the direction of arrival of a known waveform information source based on a distributed array. The method comprises the following steps of: constructing a distributed array U; acquiring a subarray output signal X (t); and constructing a measurement vector of a subarray output signal X (t), constructing an array manifold dictionary of a distributed array U, and obtaining a direction-of-arrival estimation value of the known waveform information source based on compressed sensing. The distributed array not only can effectively suppress interference, noise and the like, but also has a larger array aperture, so that the distributed array has higher angle resolution for signals, and thus has better direction-of-arrival estimation precision.

Description

technical field [0001] The invention belongs to the technical field of signal processing, and relates to a method for estimating the direction of arrival of a signal source, in particular to a method for estimating the direction of arrival of a known waveform signal source based on a distributed array. Background technique [0002] As an important subject in the field of signal processing, array signal processing has broad application prospects in the fields of parameter estimation, military electronic countermeasures, signal recognition, mobile communication, and medical diagnosis. Array signal processing is to place multiple antenna elements in a certain arrangement in space to form an antenna array, and use this antenna array to detect and process incoming signals, so as to realize the estimation of the number of signal sources, direction of arrival, and accurate frequency. . Direction-of-arrival (DOA) refers to the direction of arrival of space signals, that is, the dir...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/00
CPCG01S3/00Y02D30/70
Inventor 蔡晶晶甘峰明武斌李盼盼王亚宁
Owner XIDIAN UNIV
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