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

A radio frequency front-end, single-channel technology, applied in the field of radio frequency communication, can solve the problems of large chip area, complex structure and high cost, and achieve the effect of small chip area, simple system structure and low power consumption

Inactive Publication Date: 2008-06-11
PEKING UNIV
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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

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

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Embodiment Construction

[0037]For the situation that N kinds of mode signals are received in parallel, the specific method of the present invention is as follows:

[0038] (1) For the situation that N kinds of patterns are received in parallel, each pattern signal has a minimum sampling frequency fs required separately; Among these fs, the maximum fs has determined the sampling frequency fs parameter of the single channel radio frequency front-end signal of the present invention, namely :

[0039] fs=max{fs1, fs2, fs3, L L fsN}

[0040] For each mode signal, it only needs to be sampled at a sampling frequency of fs, that is, to be sampled periodically every ts=1 / fs time period. For parallel reception of N modes, divide the cycle ts time period into N time segments, each time segment receives and processes signals of one mode, that is, divides each cycle time ts into N parts for time division multiplexing, single-channel RF front-end Time-division multiplexing signals are generated sequentially, and...

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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,...

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Application Information

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IPC IPC(8): H04Q7/38G01S5/02G01S19/33
Inventor 叶乐段晓辉廖怀林赵辉辉刘军华肖慧凌黄如
Owner PEKING UNIV
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