Method for constructing radio frequency front end of multi-mode multi-band satellite navigation receiver and module thereof

Abstract

The invention discloses a configurable multi-mode multi-band satellite navigation receiving method and a radio frequency front end module constructed by the method. The front end module can receive signals of satellite navigation and positioning systems such as a global positioning system (GPS), the Big Dipper, a Galileo positioning system and a global navigation satellite system (Glonass), and comprises a configurable low-noise amplifier (LNA) with a buffer and an active balun, a folding passive mixer with a configurable frequency synthesizer, a configurable multi-mode filter, an automatic gain control (AGC) amplifier, a direct-current bias circuit, and a multi-mode multi-band program controlled and coded on-off control word from a receiving system. The radio frequency front end module can meet the requirement of multi-band multi-mode work through the control word programmed by the receiving system, has a simple and reliable structure, does not need complicated time division multiplexing control system and off-chip module, has low cost and high flexibility, and improves the noise performance of the radio frequency front end of the whole receiver and multi-mode multi-band signal processing capacity; and a one-channel signal is input into the module, and the module outputs a two-channel differential signal. The receiver can be used for receiving and processing multi-mode satellite navigation signals asynchronously, and receiving and processing satellite navigation signals with the required mode in different time intervals according to the requirement.

Description

Technical field [0001] The invention belongs to the technical field of wireless radio frequency communication, and relates to a radio frequency front-end circuit of a satellite navigation receiver, and in particular to a method for forming a radio frequency front end of a multi-mode and multi-band satellite navigation receiver and its modules. Background technique [0002] Global Navigation Satellite System (GNSS) can realize all-weather, global and high-precision continuous navigation and positioning, and it has developed rapidly in recent years. With the implementation of the GPS system modernization plan and the construction and continuous improvement of satellite navigation and positioning systems such as GLONASS in Russia, Galileo in Europe and Beidou in China, the available satellite navigation and positioning signal resources have been greatly enriched, and multi-band and multi-system satellites have been developed. Navigation receivers are an inevitable development trend....

AI Technical Summary

Problems solved by technology

However, the realization of the function of the multi-mode receiving front-end chip must be equipped with multiple low-noise amplifiers / mixers and a multi-mode control logic management module. The system circuit is more complicated, which increases the circuit chip area.

[0006] Obviously, the implementation methods of RF front-end solutions in the prior art generally have defects such as complex circuit structure, high technical difficulty, large circuit scale, and the need for off-chip support accessories, which directly affect the integration.

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