Deception jamming signal detection method based on single receiver

Abstract

The invention discloses a deception jamming signal detection method based on a single receiver. The method comprises steps: the position of a satellite after correction under an ECEF coordinate systemis acquired, satellite clock offset correction, ionosphere delay correction and troposphere delay correction are used to correct a measured pseudo range to obtain a pseudo range after correction, a least square method is used for iterative solution, the first position of a carrier under the ECEF coordinate system is obtained, and based on a pseudo range double difference model of the satellite, Taylor's approximation is carried out for iterative solution to obtain the second position of the carrier under the ECEF coordinate system; and according to whether the position offset between the first position and the second position is larger than a preset threshold, whether the currently-received signals are the deception jamming signals is judged. The detection is realized by only requiring the single receiver or a single antenna and the pseudo range measurement information, requirements on equipment are low, the algorithm is simple and efficient, the realization process is simple, and themethod is applicable to generation-type deception jamming and forward-type deception jamming.

Description

technical field [0001] The invention relates to a detection technology of a deception interference signal of a satellite navigation system, in particular to a detection method of a deception interference signal based on a single receiver. Background technique [0002] With the increasingly widespread and in-depth application of satellite navigation systems in people's production and life, the security situation they face is becoming more and more severe. Intentional or unintentional deception and interference affect the normal use of navigation terminals and timing terminals, resulting in wrong positioning and timing information. The spoofing interference for satellite navigation receivers is mainly to make the receiver capture the interference signal, and then generate wrong positioning. This kind of interference mainly has two types: generation type and forwarding type. The C / A code part of the satellite signal is open and transparent, and its structure is well known to t...

AI Technical Summary

Problems solved by technology

However, different methods can achieve the detection of spoofing jamming signals to a certain extent, but there are also limitations and scope of application

For example, when a common antenna is used, it is impossible to obtain the angle of arrival information of the signal, and it is impossible to use the signal to monitor and realize the judgment of deceiving interference signals; when there is only a single receiver or a single antenna, it is impossible to use dual receivers or dual antennas for differential calculation method, and the detection performance of the dual-receiver pseudo-range single-difference method is affected by the baseline length of the receiver and the number of satellites

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