Apparatus for generating simulation navigational satellite reflected signal

Abstract

The invention discloses a generator for simulating navigation satellite reflected signals, comprising a common computer, an antenna, a navigation information module (3), an intermediate frequency signal generating module and a radio frequency module (2), wherein the navigation information module (3) and the intermediate frequency signal generating module are stored in the memory of the computer, the intermediate frequency signal generating module comprises a frequency spread modulator (1), a code digital control oscillator (4), a carrier digital control oscillator (5), a code delay generator (6) and a Doppler shift generator (7). The invention simulates the change of navigation satellite signals at a reflector surface or a reflector and generates the transmission time delay and Doppler shift of the reflected signals according to the change of the track of the receiver. The generator can test delay mapping receivers, to provide a new test method for the development of marine remote sensors and the utilization of reflected signals of global navigation satellite systems.

Description

technical field [0001] The present invention relates to a device for generating analog signals, more particularly, a device for generating reflected signals used for simulating the changes of navigation satellite signals after passing through reflectors or reflectors. Background technique [0002] Using the reflected signals of the Global Navigation Satellite System (GNSS) to invert the ocean wind field, a large number of experiments have been done in the United States, Europe and China, and preliminary applications have been obtained. With the construction of the European Galileo Navigation Satellite System (GALILEO), the construction of China's Beidou system, and the modernization process of the Russian Global Orbit Navigation Satellite System (GLONASS), more and more applications need to use the reflected signals of navigation satellites to form a dual-base passive system. The radar system retrieves the physical parameters of the reflector or reflector, such as the sea su...

AI Technical Summary

Problems solved by technology

However, for the development of receivers that can receive reflected signals from navigation satellites, there is a lack of necessary means of debugging, testing, and verification, so that the developed receivers can only be tested on site, which increases the cost of system development

Existing GPS signal generators lack the ability to generate reflected signals, and can only generate a small number of multipath interference signals, which are very different from the signals reflected by reflective surfaces and reflectors

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