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Deception jamming detection method based on multiple antennas

A technology of spoofing interference and detection methods, which is applied in the field of satellite navigation, can solve the problems of limited application and low equipment complexity, achieve the effect of low equipment complexity, wide application range, and improve the ability of navigation countermeasures

Inactive Publication Date: 2015-07-22
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

The present invention provides a new means of detection and identification of spoofing interference with a wide application range and relatively low equipment complexity, which can solve the problem of limited application of existing spoofing interference detection methods, and can be applied to the spoofing method of the Beidou navigation system. Interference Detection and Cancellation

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  • Deception jamming detection method based on multiple antennas
  • Deception jamming detection method based on multiple antennas
  • Deception jamming detection method based on multiple antennas

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Embodiment Construction

[0032] The present invention will be further described below by taking an L-shaped antenna composed of five array elements and a dual-channel receiver as an example, with reference to the accompanying drawings.

[0033] The L-shaped antenna array structure for spoofing jamming detection is as follows: figure 1 shown. Through the switch control matrix, the phase difference between different receiving array elements can be accurately estimated, and then the incident angle (including azimuth and elevation angle) of the received signal can be estimated, and the identification of spoofing interference can be realized through the satellite position comparison calculated by the ephemeris solution.

[0034] Combine below figure 2 The process flow of the present invention is further described. A method for detecting spoofing interference based on multiple antennas, the detection method is realized by correlation interferometric direction finding and ephemeris comparison after despre...

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Abstract

The invention provides a deception jamming detection method based on multiple antennas, aiming to solve the problems about detection and recognition of deception jamming for a satellite navigation system. The deception jamming detection method includes utilizing observed quality carrier phase capable of being provided by a receiver itself and adopting a multi-antenna direction finding process to achieve estimation of direction of arrival of satellite navigation signals or deception jamming signals, comparing the estimation result with ephemeris messages solved from the receiver so as to achieve detection and recognition of deception jamming. The deception jamming detection method based on multiple antennas utilizes the observed quality information provided from the receiver of the existing satellite navigation system sufficiently, has the advantages of simple structure, low complexity and wide application, and is a practical deception jamming detection and recognition algorithm for the field of satellite navigation deception monitoring.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a multi-antenna-based detection method for fraudulent interference. Background technique [0002] Satellite navigation spoofing interference signals refer to the false signals that transmit satellite navigation signals with the same parameters (only the information code is different), interfere with satellite navigation receivers, destroy the code synchronization circuit of the receiver, and cause them to generate wrong positioning information. [0003] At present, the domestic research on the detection and identification technology of satellite navigation deception interference is in its infancy, although some methods have been proposed, such as: using the carrier-to-noise ratio or absolute power change rate of the received signal to detect deceitful interference, using the pseudorange of the signal Change rate detection, detection by carrier phase change rate or Doppler freq...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21
CPCG01S19/215G01S19/21
Inventor 范广伟蔚保国王振华翟江鹏
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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