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Anti-interference method of GNSS (global navigation satellite system) receiver equipment

A technology of receivers and equipment, which is applied in the direction of instruments, measuring devices, satellite radio beacon positioning systems, etc., and can solve problems such as interference misjudgment, low resolution, and performance degradation

Inactive Publication Date: 2014-03-12
WUHAN UNIV
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Problems solved by technology

[0009] The resolution of this method is low, and a large number of banded nulls are formed around the nulls in the direction of the interference source, and when the signal-to-interference-noise ratio (SINR) decreases, the performance deteriorates seriously, and even causes interference misjudgment problems

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  • Anti-interference method of GNSS (global navigation satellite system) receiver equipment
  • Anti-interference method of GNSS (global navigation satellite system) receiver equipment

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Embodiment Construction

[0061] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0062] The present invention is realized on existing GPS receiver, and the principle of existing receiver is as follows:

[0063] GPS receiver is the user equipment of GPS navigation satellite, and it is the terminal instrument to realize GPS satellite navigation and positioning. The GPS satellite signal received by the GPS receiver can measure the signal propagation time delay from the satellite to the receiver after correlation processing, and calculate the distance between the receiver and the satellite (it is called pseudo-range because of the error), In order to determine the location and time of the GPS receiver and other information. figure 2 A realization block diagram of a general GPS receiver is given. It is mainly composed of four parts: antenna, RF front end, intermediate frequency data acquisition and signal processing.

[0064] Hardware impl...

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Abstract

The invention provides an anti-interference method of GNSS (global navigation satellite system) receiver equipment. The anti-interference method adopts spatial spectrum estimation MUSIC (multiple signal classification) algorithm, thus having good anti-interference effect. Different from traditional power inversion algorithm, the spatial spectrum estimation MUSIC algorithm distributes banded nulls near an interference source. The anti-interference method can accurately find the interference direction and can effectively restrain the interference; even if the signal to interference ratio is reduced to be 20dB, the anti-interference method can also restrain the interference.

Description

technical field [0001] The invention belongs to the technical field of GNSS engineering safety, and in particular relates to an anti-jamming method for GNSS receiver equipment; it is a beam-forming anti-jamming beam-forming algorithm to prevent the GNSS receiving end from being continuously interfered by the outside world. Background technique [0002] The channels of satellite communication systems are very fragile and susceptible to jamming and spoofing. The purpose of GNSS anti-jamming technology is to do its best to suppress the attacks of external electromagnetic energy and electromagnetic spectrum on GNSS receivers, and to ensure the safety of satellite communications with effective measures. In short, communication satellites undertake the task of providing communication support and must have strong anti-jamming capabilities. Therefore, it is of great significance to study anti-jamming technology in depth and extensively to improve its anti-jamming capabilities. [0...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21
CPCG01S19/21
Inventor 陈鲤文郑建生刘郑雷莉董坤周素菲王贝
Owner WUHAN UNIV
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