Concealed satellite navigation positioning system

Abstract

A concealed satellite navigation and positioning system comprises a concealed satellite constellation, a concealed navigation and positioning signal, a concealed navigation and positioning ground master control station, an intelligent receiver and a passive orbit determination station. The concealed satellite constellation is a generic GEO communication satellite constellation and is composed of aC / Ku frequency band GEO commercial communication satellite, an SIGSO small-dip-angle synchronous orbit satellite and an IGSO inclined orbit satellite. The concealed navigation positioning signal is concealed under an original service signal of a generic GEO communication satellite, the signal power is less than one percent of the full-load power of a satellite transponder, the bandwidth of the navigation signal is more than 40MHz, and the signal-to-noise ratio reduction amplitude of the original signal does not exceed 0.3 dB; wherein the concealed navigation positioning ground master controlstation is a concealed navigation positioning fixed station which is fixedly arranged or a concealed navigation positioning vehicle-mounted communication-in-static station which can move along with avehicle; the intelligent receiver comprises an antenna module, a radio frequency module, a baseband processor module and an autonomous navigation module; the passive orbit determination station comprises at least four orbit determination reference stations located on the surface of the earth. The orbit determination base station receiver collects satellite signals, calculates the position correction amount of a measured satellite, counts the orbit determination precision, arranges the satellite position correction amount information into a navigation message, and injects the satellite positioncorrection amount information into the satellite through the concealed navigation positioning ground master control station for positioning by a user.

Description

technical field [0001] The invention belongs to the field of satellite navigation, in particular to a concealed satellite navigation and positioning system. Background technique [0002] The current satellite navigation technology is developed such as GPS in the United States, GLONASS in Russia, Galileo in Europe and Beidou Satellite Navigation System (BDS) in China. In addition to these four global navigation systems, many countries are developing their own regional positioning systems, including Japan's QZSS and India's IRNSS. The above-mentioned system is similar to GPS with minor differences, and there is no essential difference. The extremely powerful GPS is easily jammed. The satellite signal is attenuated by a path of nearly 20,000 kilometers, and the power reaching the ground is extremely weak (the order of magnitude is only 10-16 watts). In particular, GPS is allocated only three narrow and fixed L-bands in the International Telecommunication Union (ITU). During...

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Problems solved by technology

[0005] In order to solve the problem that the satellite navigation system is easily identified and interfered, the object of the present invention is to provide a concealed satellite navigation and positioning system, which does not need to launch special navigation satellites, but hides the navigation signals on ordinary communication satellites , the navigation and positioning function is realized when the system and signals are concealed, and it is not easy to be discovered or interfered. In the case of fighting against the enemy, the concealed navigation and positioning system can still work normally; in addition, the system can also realize star changing, There are three ways to actively avoid potential or existing interference, such as frequency change and code change, which have very important military significance

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