Anti-cheating interference signal processing method of GNSS time service type satellite receiver

A technology for satellite receivers and interference signals, which is applied in the field of satellite navigation timing applications, can solve the problems of adding additional antennas, high cost, and anti-spoofing methods that cannot achieve deception elimination, so as to improve timing accuracy, increase product costs, and eliminate timing errors Effect

Active Publication Date: 2016-11-09
郑州威科姆科技股份有限公司
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the existing anti-spoofing methods cannot achieve deception elimination or need to add additional antennas or need to upgrade and t

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  • Anti-cheating interference signal processing method of GNSS time service type satellite receiver
  • Anti-cheating interference signal processing method of GNSS time service type satellite receiver

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Embodiment Construction

[0019] Generally speaking, the main purposes of satellite navigation systems are positioning and timing, and the signals broadcast by navigation satellites include observations and broadcast messages. The observation data is mainly the satellite signal launch time information, and the broadcast message includes time information, satellite status information and ephemeris data. The time-service satellite receiver receives the observation data and broadcast message information broadcast by the navigation satellite, completes the positioning and outputs the time information after processing, and is used for time synchronization. At present, the global positioning and navigation systems in the world include the GPS system of the United States, the GLONASS system of Russia, the GALILEO system of Europe and the Beidou system of my country. Each satellite navigation system can send broadcast signals at different frequency points, and the timing satellite receiver It can receive a sate...

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Abstract

An anti-cheating interference signal processing method of a GNSS time service type satellite receiver is disclosed. The method comprises the following steps of stepS1, using a satellite to broadcast time information of a message so as to carry out mutual examination, receiving a GNSS satellite signal of multi-mode multi-frequency points, and detecting whether there is performed signal cheating for satellite time information, if there is the signal cheating, using a punctual time method to carry out an anti-cheating action, and if there is not the signal cheating, entering into a stepS2; stepS2, detecting whether adjacent time difference value of a local clock difference is greater than a preset threshold, if the adjacent time difference value of the local clock difference is greater than the preset threshold, determining that there is signal cheating which is performed aiming at time service precision so that a satellite receiver uses an automatic position maintenance function and enters into a clock punctuality state or indicates that a time service is unavailable; and if the adjacent time difference value of the local clock difference is not greater than the preset threshold, determining that there is no cheating-type interference signal and withdrawing a program. In the invention, telegraph text comparison, time punctuality, automatic position maintenance and other methods are used so that a purpose of an anti-cheating time service type satellite receiver is reached. A realization mode is simple and is easy to process and product cost is not increased.

Description

technical field [0001] The invention relates to a satellite navigation timing application method, in particular to an anti-spoofing interference signal processing method of a GNSS timing satellite receiver. Background technique [0002] With the development of satellite navigation technology and the continuous expansion of its application fields, satellite timing synchronization technology has been widely used in industries such as electric power, transportation, communication, banking and finance. The use of satellite timing can achieve wide-area high-precision clock synchronization and low cost. In particular, my country's Beidou satellite navigation system has been officially put into operation. Synchronization technology based on satellite clocks is playing an increasingly important role in China. Satellite timing Receiver security is becoming increasingly prominent. [0003] Satellite receivers face a variety of complex electromagnetic interference environments, which c...

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Application Information

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IPC IPC(8): G01S19/21
CPCG01S19/21G01S19/215
Inventor 贾小波李军华吴淑琴刘洁赵雷洲梁永涛
Owner 郑州威科姆科技股份有限公司
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