MUSIC solution-based noncircular signal direction-of-arrival angle estimation method

A direction of arrival and non-circular signal technology, applied in the field of signal processing, can solve the problem of low estimation accuracy of direction of arrival of non-circular signals, and achieve the effect of improving the estimation accuracy

Active Publication Date: 2019-06-28
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art above, and propose a non-circular signal direction of arrival estimatio

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  • MUSIC solution-based noncircular signal direction-of-arrival angle estimation method

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail:

[0039] refer to figure 1 , one A method for estimating the direction of arrival of a non-circular signal based on MUSIC solution, comprising the steps of:

[0040] Step 1) Build the nested array c:

[0041] Step 1a) Using the antenna receiver as an array element, construct a first uniform linear array a comprising M array elements and a second uniform linear array a comprising N array elements with a spacing of (M+1)d between adjacent array elements b, M≥1, N≥1, the distance between adjacent array elements in a is d, the distance between adjacent array elements in b is (M+1)d, 0

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Abstract

The invention provides a MUSIC solution-based noncircular signal direction-of-arrival angle estimation method which is used for solving the prior-art technical problem that the noncircular signal direction-of-arrival angle estimation precision is low. The method is implemented in the following steps: 1) building a nested array c; 2) acquiring an output signal Y(t) of the nested array c; 3) calculating a virtual uniform array covariance vector and an elliptic covariance vector of the nested array c; 4) building an extending covariance matrix G; 5) calculating noise subspace Un of the extendingcovariance matrix G; 6) building an array flow pattern matrix Q(theta) of a target direction-of-arrival angle theta; 7) calculating a spatial spectrum P(theta) of the target direction-of-arrival angletheta based on a MUSIC solution method; 8) drawing an amplitude spectrogram of the target direction-of-arrival angle theta and the spatial spectrum P(theta) thereof. The MUSIC solution-based noncircular signal direction-of-arrival angle estimation method can be applied to passive location on airplane and ship moving objects.

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 non-circular signal, in particular to a method for estimating the direction of arrival of a non-circular signal based on a MUSIC solution, which can be used to estimate the direction of arrival of an aircraft or a ship. source location. Background technique [0002] In modern communication, radar and satellite systems, commonly used modulation signals such as binary phase shift keying, M-ary amplitude shift keying and amplitude modulation have attracted the attention of experts and scholars because of their non-circular signal characteristics. The direction of arrival of non-circular signals is one of the important characteristic parameters of non-circular signals. The estimation of direction of arrival of non-circular signals refers to the use of antenna arrays to inductively receive acoustic signals and electromagnet...

Claims

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Application Information

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IPC IPC(8): G01S3/14
CPCY02D30/70
Inventor 蔡晶晶张凯风李鹏
Owner XIDIAN UNIV
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