False satellite baseband signal maker and control method of built-in processor thereof

Abstract

The invention relates to a signal transmission equipment in the electronic technical field, in particular to a baseband signal generator of pseudosateilite that adopts modern technological means and is used for satellite signal simulation and the implementation of pseudosateilite location and so on, as well as a control method of the embedded processor of the invention. The equipment comprises a field programmable gate array (FPGA) and a module of intermediate frequency signal, etc, and the baseband signal generator is combined by a soft core and a four-way pseudosateilite peripheral together. By adopting a baseband signal control software of the pseudosateilite designed by the equipment, the method responds to control commands in PC. The method mainly solves the related technical problems of how to integrate the whole system core into a chip of field programmable gate array. The invention has the advantages that the format and content of output signal of the equipment are consistent with that of GPS signal, and according to the defined communication protocol, the method can resolve the command parameters from the data frame and execute the commands, the method improves the reliability and controllability, and has the advantages of low cost and flexible control, etc.

Description

technical field [0001] The present invention relates to the signal sending equipment of electronic technical field, especially a kind of using modern scientific and technological means, is used for generating and controlling the intermediate frequency signal of the pseudolite signal similar to the GPS (Global Positioning System) satellite signal format of the global satellite positioning system, used for A device for simulating satellite signals and realizing multiple applications such as pseudolite positioning and a control method for an embedded processor thereof. Background technique [0002] As the name suggests, a pseudolite is a satellite simulation device. Its main function is to simulate a satellite, here it is to simulate a GPS satellite, and transmit a satellite navigation signal that is exactly the same as the GPS signal format. The emergence of pseudolites is not too late. Before the construction of the GPS system in the United States was completed, pseudolites w...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to mainly solve the problem of how to integrate the whole system core in a Field Programmable Gate Array FPGA (Field Programmable GateArray) chip; Text output and carrier output of direct digital frequency synthesizer DDS (DirectDigital Synthesis); solve technical problems such as how to decode the command of the host computer and realize complex control functions according to the command and how to complete the soft core program of the embedded processor

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