4 results about "Satellite navigation" patented technology

The invention relates to the field of avionics system time synchronization methods, in particular to an avionics integrated test time synchronization system based on a satellite simulator and a synchronization method thereof.The system comprises a multi-system satellite navigation simulator, a satellite navigation antenna, an anti-interference processor, a comprehensive task processor and testing and excitation/simulation equipment; the method comprises the following specific steps: S1, a time frequency module of the multi-system satellite navigation simulator receives external clock input; s2, outputting a 1PPS (pulse per second) signal; s3, the anti-interference processor transmits the time signal to a comprehensive task processor in a second pulse signal or high-speed RS-422 data form; s4, the comprehensive task processor transmits the time signal to the airborne avionics equipment through the FC optical fiber bus and the GJB289A bus; time synchronization between avionics system products, between joint test environment devices and between products and devices is achieved, and timeliness of information interaction and software scheduling and synchronism of data recording are effectively guaranteed.

The invention provides a satellite navigation deception jamming detection method based on generalized RDSS positioning, and belongs to the technical field of satellite navigation. According to the method, on the basis of a traditional Beidou dual-mode receiver, detection and identification of deception jamming signals are achieved through an original pseudo-range verification mode based on generalized RDSS positioning, and meanwhile, traversal and verification of pseudo-range observed quantities of all RNSS satellites are achieved by using RDSS positioning as a passive handshake positioning mode and using generalized RDSS as a positioning mode integrating RDSS and RNSS. According to the method, all satellite number pseudo-ranges are identified through RDSS positioning, generalized RDSS positioning, RNSS positioning and satellite number polling traversal modes, identified deception signal information is recorded and output in an alarm mode, and real-time detection of deception jamming of the satellite navigation receiver is completed.

The invention discloses a satellite navigation positioning signal processing device method and apparatus. The method comprises: receiving a satellite navigation positioning signal; determining a stable part and an unstable part of the satellite navigation positioning signal; filtering the unstable part of the satellite navigation positioning signal and using the stable part of the satellite navigation positioning signal as a filtered satellite navigation positioning signal; and according to the filtered satellite navigation positioning signal, obtaining a positioning result. With the method disclosed by the invention, the influence on the positioning result by a shelter or a reflection signal can be reduced; the positioning result error can be reduced; and the navigation positioning precision can be improved.