Code phase identification based deception signal detection method of satellite receiver

A satellite receiver and signal detection technology, which is applied to satellite radio beacon positioning systems, measurement devices, radio wave measurement systems, etc., and can solve problems such as the threat of reliable application of satellite receivers

Active Publication Date: 2016-06-29
南京华麦机器人技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: the technical problem to be solved by this invention is to provide a satellite receiver spoofing signal based on code phase identification for the deve...

Method used

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  • Code phase identification based deception signal detection method of satellite receiver
  • Code phase identification based deception signal detection method of satellite receiver
  • Code phase identification based deception signal detection method of satellite receiver

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Embodiment

[0060] This embodiment uses the spoofing signal generated by the satellite signal simulator and the real signal received by the outdoor antenna to verify the satellite receiver spoofing signal detection method based on code phase identification. First, use the satellite receiver development board of FPGA and DSP to separately collect the outdoor antenna The received real signal is used to complete the normal acquisition and tracking processing of the baseband signal in the satellite receiver. Secondly, the indoor signal jammer is used to suppress the interference of the satellite receiver, causing the original tracking signal to lose lock, and then the L1 frequency point received by the antenna is further The GPS satellite signal and the spoofing signal generated by the satellite signal simulator are processed by the RF front end of the development board and turned into a digital intermediate frequency signal, and the satellite intermediate frequency signal is collected and stor...

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Abstract

The invention discloses a code phase identification based deception signal detection method of a satellite receiver. The method comprises the following steps that S1) when the satellite receiver recaptures and tracks signals, deception signal detection is carried out on the basis of code phase identification by utilizing peak value results related to pseudo code despreading in the baseband signal processing process of the satellite receiver; S2) if no deception signals are found via detection, a carrier movement state obtained by a track reckoning method and satellite movement state information obtained by ephemeris parameters are used to further carry out code phase identification on the recaptured and tracked signals, namely, the pseudo phase parameters despread by the satellite receiver are distinguished; and S3) if it is detected that the despreading demodulation signals of the satellite receiver include the deception signals, alarm is raised against the deception signals, the deception signals are isolated, and thus, capabilities of resisting cheating and interference of the satellite receiver are enhanced.

Description

technical field [0001] The invention belongs to the technical field of satellite navigation and receiver signal processing, in particular to a method for detecting spoofing signals of satellite receivers based on code phase identification. Background technique [0002] As an important technical approach in the navigation field, satellite navigation can provide all-weather, continuous and high-precision three-dimensional position information to global users in real time. With the gradual development of various satellite navigation jamming and spoofing technologies, jamming and spoofing signals pose severe challenges to the accuracy, continuity and integrity of the satellite navigation system, especially the spoofing jamming will seriously threaten the positioning performance of the satellite navigation system. effective application. [0003] Most of the current satellite spoofing signal detection methods use multi-antenna methods to identify in the radio frequency signal pro...

Claims

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Application Information

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IPC IPC(8): G01S19/21
CPCG01S19/215
Inventor 谢非赵静杨继全彭晨钱伟行杨建飞李娜孙冀张雷吴茜
Owner 南京华麦机器人技术有限公司
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