Baseband part structure for carrying out eight-frequency point processing on satellite signals

Abstract

The invention discloses a baseband part structure for carrying out eight-frequency point processing on satellite signals, which comprises an FPGA module, a processor module, a memory module and a power supply module, wherein the FPGA module is provided with a radio frequency data input interface; the FPGA module comprises a carrier module for realizing carrier generation and variable frequency functions, a pseudo-random code module for completing signal generation, code generation, variable frequency and generating an integral reset mark, a correlator group for providing a delay line function on the local pseudo-random code and providing functions of a plurality of groups of correlators, an observation quantity recording module for recording data information provided by the carrier module and the pseudo-random code module, and a quick capturing module for completing a quick P code direct capturing function and capturing frequency point pseudo-random codes expect the P code. The baseband part structure for carrying out eight-frequency point processing on satellite signals provided by the invention can receive and process the satellite signals with eight frequency points of GPS, GLONASS and BD at the same time.

Description

technical field [0001] The invention relates to the field of satellite signal processing, in particular to a baseband part structure for processing satellite signals in eight frequency points. Background technique [0002] At present, there are various types of satellite navigation receivers, which are divided into civil and military, single-frequency and multi-frequency, timing and measurement, handheld, vehicle-mounted, airborne, and bomb-borne. Although there are many types of satellite navigation receivers, their main function is to obtain the precise position, speed and time information of the receiver. [0003] Since the more frequency point signal types of received satellite signals, the more satellites that can provide original observations (pseudorange, pseudorange rate, carrier phase, Doppler, etc.) The more original observations provided to the information calculation part and differential calculation part, the more stable and reliable the positioning result is. ...

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Problems solved by technology

[0004] But at present, the baseband part of most receivers with satellite navigation can only receive and process B1 of BD2, L1 of GPS and L1 of GLONASS in combination of one or several frequency point signals, rarely can receive and process GPSL1 / L2 / L5, GLONASSL1 at the same time / L2 and BDB1C / B2C / B3C satellite signals with eight frequency points, resulting in a small number of available frequency points. For the original observation types that require more frequency points such as differential positioning, the differential calculation requires at least one system. The original observations of two or more frequency point type signals, this situation is obviously not applicable to the current development

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