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Method for estimating angle range of incoming wave direction of intrusion signals based on phase difference

A technology of angle range and direction of arrival, which is applied in the field of angle range estimation of direction of arrival of intrusion signals based on phase difference data, can solve problems such as complicated calculation process, and achieve simple antenna structure, small amount of calculation, high degree of authenticity and reliability Faithful effect

Active Publication Date: 2019-08-09
BEIHANG UNIV
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Problems solved by technology

During the processing of this algorithm, the target is positioned by using the signal’s angle of arrival, time delay and Doppler frequency shift information, and the velocity vector is calculated by using the Doppler frequency shift of the reflected signal of the moving target, and the stationary target is sorted out and removal, the calculation process is complex

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  • Method for estimating angle range of incoming wave direction of intrusion signals based on phase difference
  • Method for estimating angle range of incoming wave direction of intrusion signals based on phase difference
  • Method for estimating angle range of incoming wave direction of intrusion signals based on phase difference

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Embodiment Construction

[0024] The specific implementation method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] The present invention is a method for estimating the angular range of the direction of arrival of an intrusion signal based on a phase difference. The overall flow chart is as follows figure 1 As shown, the present invention realizes the statistics of the relationship function of angle error in different areas and the change of SNR, and uses the spectrum analysis method to quickly and accurately estimate the SNR of the intrusion signal. Specifically include the following steps:

[0026] The first step is to use the UAV airborne antenna to measure the phase difference data of the intrusion signal, and calculate the estimated value of the angle of the incoming wave direction of the intrusion signal relative to the UAV based on the phase difference data.

[0027] The UAV airborne antenna is a two-dimensional single-baseline ...

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Abstract

The invention discloses a method for estimating the angle range of the incoming wave direction of intrusion signals based on the phase difference, and belongs to the technical field of signal detection. The method for estimating comprises the steps that the intrusion signals in the airspace are identified to obtain an angle estimation value, an angle error function is established, the signal-to-noise ratio of the intrusion signals is estimated, the angle range of an unknown radiation source relative to an unmanned aerial vehicle is calculated by using phase difference data and the signal-to-noise ratio of incoming signals, and thus the orientation function in the airspace is realized. According to the method for estimating the angle range of the incoming wave direction of intrusion signalsbased on the phase difference, the antenna structure is simple, the calculation amount is small, and the precision is high; and the angle error with the signal-to-noise ratio change function is obtained according to a large amount of statistical data, and high authenticity and credibility are achieved.

Description

technical field [0001] The invention belongs to the technical field of signal detection, and specifically refers to a method for estimating the angular range of the direction of arrival of an intrusion signal based on phase difference data. Background technique [0002] The unmanned system data link undertakes the important tasks of unmanned system command and control and information transmission, and is an important part of the unmanned system. In the military, it can be used for aerial reconnaissance, electronic jamming, communication relay, target positioning, battlefield surveillance and border patrol, etc. In civilian use, it can be used for aerial photography, disaster monitoring, geophysical prospecting, aerial photography, etc. In recent years, with the gradual improvement of unmanned systems, the application of unmanned systems has gradually shown explosive growth and put forward higher requirements for the safety, reliability and adaptability of unmanned system dat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/00
CPCG01S3/00
Inventor 刘春辉孙宇航丁文锐
Owner BEIHANG UNIV
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