Method and device for implementing GNSS multi-module parallelism receiving at front end by using single path radio frequency

Abstract

The invention provides a method and device of realizing parallel receiving of GNSS multimode by adopting a single-pass radio frequency front-end and belongs to the radio frequency communication technical field. The method comprises: after RF frequency signal received entering the single-pass radio frequency front-end, a sampling period of a signal pathway is divided into N short time segments according to the number N of the modes of receiving signals, the RF signals is down converted into IF signals by a Mixer and a LPF low pass filter controlled by a time division multiplexed signal to shift the time division multiplexed signal, the single-pass radio frequency front-end receives a mode of signal within every short time segment and realizes parallel receiving signals of N modes at the single-pass radio frequency front-end in such periodic alternating repetition. The invention can realize the parallel receiving of GNSS multiple modes (including BD-2, GPS, Galileo and GLONASS) with only a single-pass radio frequency front-end under the control of the time division multiplexed system.

Description

technical field [0001] The invention belongs to the technical field of radio frequency communication, and in particular provides a method and device for realizing GNSS multi-mode parallel reception by using a single-channel radio frequency front end. Background technique [0002] The Global Navigation System (GNSS) has been widely used in the positioning, navigation, timing and precision measurement of various civilian and military targets, and has gradually become one of the three fastest-growing information industries in the world (mobile phones, the Internet and satellite positioning and navigation). . [0003] In the process of GNSS development, the GPS (Global Positioning System) system in the United States was the first to be practical, so the single-mode receiver technology for the GPS system is also the most mature, such as the literature MICHAEL S.BRAASCH, and A.J.VAN DIERENDONCK, "GPS Receiver Architectures and Measurements", PROCEEDINGS OF THE IEEE, VOL.87, NO.1,...

AI Technical Summary

Problems solved by technology

This "RF front-end architecture for multiplexing multiple signal paths in parallel", such as the domestic patent (ZL 200520079633.20), is based on superimposing multiple signal paths in parallel, and does not propose a new method for multi-mode receivers, which requires multiple RF front-ends Modules, including multiple mixers, filters, analog-to-digital converters, etc., have the disadvantages of complex structure, large chip area, high power consumption, and high cost, and are not suitable for low-cost, low-power portable receivers

Images