Anti-broadband-interference Beidou vehicle-mounted all-in-one machine

Abstract

The invention provides an anti-broadband interference Beidou vehicle-mounted all-in-one machine. The anti-broadband interference Beidou vehicle-mounted all-in-one machine is composed of a host machineand a cable; the host machine comprises an anti-interference antenna array element, a receiving channel module, a power amplifier / combiner, an anti-interference module, a transmitting filter, a baseband signal processing board, a power source information board, a power source filter and the like; the core of the all-in-one machine of the invention is the anti-interference module; according to theanti-interference module, a frequency domain narrowband interference suppression and space-time adaptive notching processing cascaded mode is adopted, namely, frequency domain narrowband interferencesuppression is performed on intermediate-frequency signals, space-time adaptive processing is performed on a notching result, and therefore, broadband interference can be suppressed. According to theanti-broadband interference Beidou vehicle-mounted all-in-one machine of the invention, anti-interference performance, system complexity degree, reliability, power consumption and other factors are balanced. The anti-broadband interference Beidou vehicle-mounted all-in-one machine can resist narrow-band interference and multi-broadband interference simultaneously, perform up-conversion on interference-cancelled signals so as to obtain radio frequency signals, and process navigation signals according to a conventional method.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and is specifically applied to an anti-broadband interference Beidou vehicle-mounted all-in-one machine. Background technique [0002] The BeiDou Navigation Satellite System (Beidou Navigation Satellite System) is a global satellite navigation system that is being implemented in my country, independently developed and operated completely independently. It has won more and more domestic and foreign applications by virtue of its wide range of services, accurate positioning, and good real-time navigation. attention. The "Beidou II" satellite navigation and positioning system is a dual-band ranging system, which breaks the monopoly of the United States and Russia in global navigation and positioning. play a vital role. [0003] At present, the existing large-scale Beidou vehicle-mounted all-in-one machines in the market do not have anti-jamming functions, and can realize RNSS positio...

AI Technical Summary

Problems solved by technology

However, due to the very weak characteristics of the Beidou signal, it is vulnerable to interference from external narrowband signals, broadband signals, or deliberate interference from the enemy, resulting in the failure of the Beidou receiver; it may be deceived and interfered in the case of interference , resulting in the inability to perform RNSS positioning or large deviations in RNSS positioning accuracy. The core of the problem is that the Beidou vehicle-mounted all-in-one machine does not have the anti-interference function, and cannot identify the correct Beidou information in the presence of interference, and identify and eliminate noise and interference signals.

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