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Multi-base-line phase searching type two-dimensional spatial spectrum direction-measuring method

A two-dimensional space, multi-baseline technology, applied in the field of direction finding, can solve the problems of large amount of calculation, etc., and achieve the effect of extremely easy algorithm, high precision of direction finding, and simple method

Inactive Publication Date: 2012-07-04
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

The spatial spectrum estimation (MUSIC) method based on multiple signal classification can cope with such situations, but the calculation is very heavy

Method used

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  • Multi-base-line phase searching type two-dimensional spatial spectrum direction-measuring method
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  • Multi-base-line phase searching type two-dimensional spatial spectrum direction-measuring method

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Embodiment Construction

[0014] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings.

[0015] The method of the present invention uses the signals received by each antenna to directly construct a two-dimensional space spectrum function based on phase search for a single incident signal or a multi-source and multi-path incident signal, and performs two-dimensional direction of arrival estimation on the incoming wave signal, and then uses multiple The received signals of multiple antennas on the baseline are used to construct different spatial spectral functions and find their common solutions, so as to solve the problems of phase ambiguity, low signal-to-noise ratio, multi-source and multi-path, and obtain the angle of arrival of the incident signal.

[0016] Such as figure 1 As shown, the multi-baseline phase search type two-dimensional spatial spectrum direction finding method disclosed in the present invention includes th...

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Abstract

The invention discloses a multi-base-line phase searching type two-dimensional spatial spectrum direction-measuring method, which is based on a direction-measuring algorithm of a multi-base-line phase interferer, achieves the relation between angles specific to each base-line phase difference and a wave-coming direction, constructs a spatial spectrum function, and utilizes a two-dimensional searching method to obtain an angle of the incidence direction for direction measurement. The novel method utilizing the phase interferer method to measure the direction can directly perform two-dimensional searching by constructing the spatial spectrum function to obtain the direction of an incidence signal under the condition that each base-line phase difference is unknown. The multi-base-line phase searching type two-dimensional spatial spectrum direction-measuring method can achieve two-dimensional measurement of the incidence directions including multi-source and multi-path signals and effectively avoid the condition of failure of the direction-measurement method caused by an amplitude-phase error of each channel.

Description

technical field [0001] The invention relates to the technical field of direction finding, in particular to a multi-baseline phase search type two-dimensional space spectrum direction finding method, which is used for estimating the angle of arrival of the two-dimensional space spectrum. Background technique [0002] With the continuous development of array signal processing technology, passive positioning technology has higher and higher requirements for direction finding algorithms. According to different principles, direction finding algorithms can be divided into direction finding by amplitude ratio method, direction finding by phase method, direction finding by combining amplitude and phase, time difference direction finding, space spectrum estimation direction finding and so on. The most widely used methods in phase direction finding are multi-baseline phase interferometer technology and multi-baseline correlation interferometer technology, which have been widely used i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/14
Inventor 马洪朱超谭萍罗冶
Owner HUAZHONG UNIV OF SCI & TECH
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