Anti-deception-jamming design based on multipoint correlation method for satellite navigation

A satellite navigation and anti-spoofing technology, applied in the field of satellite navigation, can solve the problems of weak logic reliability and robustness, increased code complexity, and multiple logic resources, so as to improve logic reliability, occupy less hardware resources, and design Effects with low complexity

Active Publication Date: 2017-09-26
成都盟升电子技术股份有限公司
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Problems solved by technology

[0003] At present, the mainstream signal capturer adopts a two-dimensional search method combining matched filter and FFT. The matched filter and FFT logic used in this method rely heavily on hardware resources. It can achieve high-performance signal capture and anti-spoofing interference at the same time. , will greatly increase the complexity of the code, which will make the logic less reliable and robust, and will consume more logic resources

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  • Anti-deception-jamming design based on multipoint correlation method for satellite navigation
  • Anti-deception-jamming design based on multipoint correlation method for satellite navigation

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing:

[0023] The present invention adopts the code tracking loop in the signal tracking loop to track multi-point signals. In the code stripping stage in the signal tracking loop, a sliding correlator that is ahead of the normal signal by N code chips is set. By judging the sliding correlator The energy peak of the current tracking channel is used to judge whether the signal in the current tracking channel is a spoofing signal. If it is a spoofing signal, the signal is eliminated and the locked tracking of the real signal is resumed.

[0024] By setting the sliding correlator ahead of the normal signal by N chips, the correlation peak detection of N points can be realized, and then the multi-point signal detection and judgment can be realized.

[0025] Such as figure 1 As shown, the specific process of satellite navigation anti-spoofing jamming is as follows:

[0026] S1: Use t...

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Abstract

The invention discloses anti-deception-jamming design based on a multipoint correlation method for satellite navigation. A code tracking loop in a signal tracking loop is adopted to track multipoint signals, a sliding correlator whose signal is N chips ahead of a normal signal is arranged at a chip stripping stage of the signal tracking loop, whether a signal in the current tracking channel is a deception signal is judged by judging the energy peak value of the sliding correlator, the signal is rejected if the signal is the deception signal, and locking and tracking of a true signal are restored. When applied to satellite navigation systems, the method can realize rapid detection, judgment and rejection of deception-jamming signals, is low in design complexity, occupies few hardware resources and can be widely applied to the satellite navigation system of various platforms to realize rapid and high-performance anti-deception-jamming performance, and logic reliability is improved.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation adopting GPS or Beidou global satellite positioning system system, and in particular relates to a satellite navigation anti-spoofing interference design based on a multipoint correlation method. Background technique [0002] The anti-spoofing jamming design methods in the existing satellite navigation products are mostly through the method of signal capture and identification, and judge whether the signal is a deceptive jamming signal by multiple captures and identifications of the received signal in the signal capture device, so as to realize Signal identification and rejection. [0003] At present, the mainstream signal capturer adopts a two-dimensional search method combining matched filter and FFT. The matched filter and FFT logic used in this method rely heavily on hardware resources. It can achieve high-performance signal capture and anti-spoofing interference at the same time. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/21
CPCG01S19/215
Inventor 向荣覃光全蒲元培
Owner 成都盟升电子技术股份有限公司
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