Satellite navigation spoofing interference suppression method based on extended raim
A technology for deception jamming and satellite navigation, applied in the field of satellite navigation anti-jamming, which can solve the problems of changing the receiver structure and high computational complexity
Inactive Publication Date: 2019-07-23
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology
Svensson proposed a method of suppressing the direction of spoofing interference by using the estimated position of the receiver and the estimated value of DOA of the received signal. This method needs to calculate the position of the receiver and demodulate the navigation message, and the calculation complexity is high.
It is worth noting that these methods will more or less change the structure of the receiver
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[0051] The extended RAIM-based satellite navigation spoofing interference suppression method provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. For the sake of convenience, the GPS (Global Positioning System) system and a single-antenna GPS receiver are taken as examples below to illustrate. In fact, this method is applicable to receivers with any antenna form.
[0052] Such as Figure 9 As shown, the satellite navigation deception interference suppression method based on extended RAIM provided by the present invention comprises the following steps carried out in order:
[0053] (1) After the receiver solves its own position solution and velocity solution, it calculates the detection statistics of pseudorange residual error and Doppler residual error and their corresponding preset thresholds respectively:
[0054] The calculation equations of receiver position and velocity are:
[0055] y=...
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The invention discloses a satellite navigation deception jamming suppression method based on expanded RAIM. The method fully uses generality and respective characteristics of satellite faults and repeater deception jamming and includes the steps that whether a gross error exists or not is judged by using detection statistics of a pseudorange measurement residual error of a receiver end; then detection statistics of the Doppler residual error of the receiver end is used for judging whether the gross error existing currently is deception jamming or a satellite fault; by means of mutual combination among all satellites, the number of satellites with gross errors and the specific satellites with the gross errors are determined by combining a capture result; the judgment result is fed back to a tracking loop, so that the tracking loop tracks real satellite signals. The satellite navigation deception jamming suppression method can detect satellite faults and repeater deception jamming and eliminate multi-satellite faults and multi-satellite deception jamming without changing an original structure of a receiver.
Description
technical field [0001] The invention belongs to the technical field of satellite navigation anti-interference, in particular to a method for suppressing satellite navigation deception interference based on extended RAIM. Background technique [0002] The Global Navigation Satellite System (GNSS for short) uses artificial satellites to transmit navigation signals, so that it can provide high-precision position and time information for receivers within the coverage area at any time and any place, so GNSS is of great significance . Since the GNSS satellite signal format is open, how to ensure the safety and reliability of GNSS application facilities is particularly important, and the anti-jamming problem has become the primary problem facing GNSS. Currently, Receiver Autonomous Integrity Monitoring (RAIM for short) is a method that can effectively suppress spoofing interference. The advantage of RAIM is that it is an algorithm set in the aviation GNSS receiver. It does not ne...
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IPC IPC(8): G01S19/21
CPCG01S19/215
Inventor 吴仁彪王文益任文
Owner CIVIL AVIATION UNIV OF CHINA