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Mono-pulse amplitude and phase comparison joint direction-finding method

A monopulse and amplitude ratio technology, which is applied in the field of communication, can solve problems such as ambiguity of angle and low accuracy of direction finding by amplitude ratio, and achieve the effect of high precision direction finding capability

Active Publication Date: 2019-08-30
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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Problems solved by technology

[0006] To sum up, the direction finding accuracy of the ratio is low, and the direction finding accuracy of the interferometer is high, but there is angle ambiguity when the distance between the antennas is greater than half a wavelength. multiple baselines

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Embodiment Construction

[0060] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0061] A single-pulse ratio-amplitude ratio-phase combined direction-finding method uses the ratio-amplitude direction-finding method to obtain coarse angles, estimates the ambiguity number of the interferometer, and then uses the principle of the interferometer to obtain high-precision direction-finding capabilities without ambiguity.

[0062] In a preferred embodiment, the interferometer has ambiguity in direction finding when the distance between elements is greater than half a wavelength, and the present invention estimates the ambiguity number of the phase difference of the interferometer through the amplitude ratio, so as to realize direction finding of the interferometer without ambiguity. The specific implementation steps are as foll...

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Abstract

The invention discloses a mono-pulse amplitude and phase comparison joint direction-finding method. The method comprises the following steps: acquiring a rough angle by utilizing amplitude-comparing direction-finding, estimating an interferometer ambiguous number, and then acquiring an unambiguous high-precision direction-finding capacity by utilizing the interferometer principle. Channels are constructed by array elements covering different regions, and the channels cover the direction-finding of the all-directional range. Through the direction-finding analog simulation test disclosed by theinvention, the phase difference ambiguous number is determined by utilizing the amplitude-comparing under the condition that the phase difference is ambiguous, the unambiguous direction of arrival estimation can be realized by using the interferometer principle, and the typical direction-finding precision is superior to 1 DEG.

Description

technical field [0001] The invention belongs to the technical field of communication, and specifically relates to a method for obtaining high-precision direction estimation by integrating amplitude ratio and phase difference. Background technique [0002] Monopulse amplitude ratio direction finding is a direction finding technology of radiation source reconnaissance system. For omnidirectional applications, typically 4 or 6 antennas are used to cover 360°, and the direction of the radiation source is obtained by using a larger amplitude ratio of the two channels. . Xidian University Press, 2012.09). [0003] An improved direction finding method uses the amplitude of three channels for direction finding, which improves the direction finding accuracy slightly, but requires more channels to cover the same azimuth span due to dense beam coverage (see literature: Pan Jifei et al. An Improved Amplitude and Direction Finding Method. Electronic Reconnaissance and Jamming, 2010, 31...

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Application Information

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IPC IPC(8): G01S3/10G01S3/12G01S3/48G01S3/14
CPCG01S3/10G01S3/12G01S3/48G01S3/14
Inventor 段军棋李垚王文松
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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