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Data processing method and system based on dual-mode navigation SOC chip

A technology of data processing and baseband processing, applied in the field of satellite navigation, can solve the problems of high circuit cost and power consumption, and achieve the effect of reducing overhead, reducing chip area and power consumption, and improving performance

Active Publication Date: 2020-11-10
HUAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention lies in the problems of relatively large cost and power consumption of the circuit in the dual-mode navigation SOC chip of the prior art

Method used

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  • Data processing method and system based on dual-mode navigation SOC chip
  • Data processing method and system based on dual-mode navigation SOC chip
  • Data processing method and system based on dual-mode navigation SOC chip

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Experimental program
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Embodiment 1

[0042] Such as figure 1 As shown, the data processing method based on the dual-mode navigation SOC chip, the method includes: adopting the broadband analog radio frequency front-end channel to receive, amplify, filter and sample the BD2 and GPS dual-mode system signals respectively, and input the sampled data to the baseband processing circuit respectively Carry out digital down-conversion processing on signals of GPS system and BD2 system, store, compress and correlate the obtained baseband signals, and multiplex correlators and input data memory of BD2 and GPS during correlative processing.

[0043] Introduce the method that the present invention provides below in detail, continue to refer to figure 1 The navigation signals of BD2 and GPS are first received by the antenna and coupled to the low-noise amplifier unit 1 to amplify, and the noise is suppressed at the same time, and then enter the broadband filter unit 2, which allows the navigation signal to pass through smoothl...

Embodiment 2

[0055] Corresponding to Embodiment 1 of the present invention, Embodiment 2 of the present invention also provides a data processing system based on a dual-mode navigation SOC chip, the system comprising:

[0056] The RF front-end processing module is used to receive, amplify, filter and sample the BD2 and GPS dual-mode system signals respectively by using a broadband analog RF front-end channel;

[0057] The digital down-conversion processing module is used to input the sampling data into the baseband processing circuit, and then perform digital down-conversion processing on the signals of the GPS system and the signals of the BD2 system;

[0058] The multiplexing module is used to store the obtained baseband signals in the same memory through time-division multiplexing. During correlation processing, the input data of the correlators of BD2 and GPS are compressed to reduce the calculation amount of the correlator and realize the reduction of the circuit. area and power consu...

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Abstract

The invention discloses a data processing method and system based on a dual-mode navigation SOC chip, and the method comprises the steps: carrying out the receiving, amplification, filtering and sampling of BD2 and GPS dual-mode system signals through a broadband analog radio frequency front-end channel, adopting the sampling data input baseband processing circuit to carry out digital down-conversion processing on signals of a GPS system and signals of a BD2 system, enabling obtained baseband signals to be subjected to correlation processing, and during correlation processing, multiplexing correlators of the BD2 and the GPS and an input data memory. The method has the advantages that the BD2, the GPS correlator and the related processing input data memory are multiplexed, so that the internal operand of the chip and the expenditure of the memory are reduced, the area and power consumption of the chip are reduced, and the performance of the chip is improved.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, and more particularly to a data processing method and system based on a dual-mode navigation SOC chip. Background technique [0002] At present, GPS chips basically use the superheterodyne analog mixing technology to convert the radio frequency navigation signal received by the antenna to the intermediate frequency, and then use the intermediate frequency sampling and digital demodulation technology to obtain the baseband signal. The relative movement of the receiver stores a piece of baseband signal data for multiplexing and correlation calculations, and at the same time performs traversal searches on different satellite signals and different Doppler to complete the capture of satellite signals, and use the captured results to assist the tracking channel to complete the capture Satellite tracking, and finally obtain the pseudo-range of the satellite through continuous tracking for s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/33G01S19/29G01S19/30G01S19/36G01S19/37G01S19/34
CPCG01S19/33G01S19/29G01S19/30G01S19/36G01S19/37G01S19/34Y02D30/70
Inventor 朱家兵陈亮陈明生沈晓波陈帅束仁义蔡俊蔡佳楠
Owner HUAINAN NORMAL UNIV