RADIO FREQUENCY CIRCUIT STRUCTURE FOR IMPLEMENTING FUNCTION OF CONVERTING GNSS SATELLITE SIGNAL INTO BASEBAND SIGNAL

摘要

The present invention relates to a radio frequency circuit structure for implementing a function of converting a satellite signal of a global navigation satellite system into a baseband signal. The radio frequency circuit structure comprises a channel dividing function module, a plurality of frequency converting function modules, a plurality of local oscillator signal modules, and a plurality of analog-to-digital convertor modules. The channel dividing function module is used for dividing a satellite signal of the global navigation satellite system received by an antenna into satellite signals in a plurality of channels. Each of the frequency converting function modules is used for performing frequency conversion on the satellite signals in the corresponding channels to form near zero-frequency signals. Each of the local oscillator signal module is used for generating a local oscillator signal and outputting the local oscillator signal to the frequency converting function module. By using the radio frequency circuit structure for implementing a function of converting a satellite signal of a global navigation satellite system into a baseband signal, frequency conversion and follow-up signal processing can be performed on the satellite signals in each frequency band separately, the signal quality insured, a sufficient signal to noise ratio is provided for a baseband processing circuit, thereby providing a wider application range.

主权项

1. An radio frequency circuit structure for implementing the function of converting GNSS satellite signal into baseband signal, characterized in that the circuit structure comprises:
a channel dividing module, for dividing GNSS satellite signal to a number of different channels of satellite signals according to different carrier frequency; a plurality of frequency converting modules, each of which is corresponding to each channel output from the channel dividing module and each of which is used for converting each signal in corresponding output channel of the channel dividing module to near zero-frequency signal; a plurality of local oscillator signal modules, each of which is corresponding to each frequency converting signal module and each of which is used for generating local oscillator signals and outputting them to corresponding frequency converting module; a plurality of analog-to-digital convertor modules, each of which is corresponding to the frequency converting module and each of which is used for processing the signal output from corresponding frequency converting module and outputting corresponding digital signal.