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A Configurable Navigation Signal Compatible Capture Tracking Device

A navigation signal and tracking device technology, applied in the field of navigation signal acquisition and tracking, to achieve good channel consistency, high capture and tracking performance, and low algorithm complexity

Active Publication Date: 2022-07-15
BEIJING INST OF REMOTE SENSING EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a navigation signal compatible acquisition and tracking device with configurable channels to solve the problem of fast acquisition and accurate tracking of navigation signals of the old and new systems

Method used

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  • A Configurable Navigation Signal Compatible Capture Tracking Device
  • A Configurable Navigation Signal Compatible Capture Tracking Device
  • A Configurable Navigation Signal Compatible Capture Tracking Device

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Embodiment Construction

[0022] Specific embodiments of the present invention will be described in detail below.

[0023] The specific steps of a configurable navigation signal compatible capture and tracking device are:

[0024] The first step: build a configurable navigation signal compatible acquisition and tracking structure, which includes: orthogonal frequency offset removal module 1, correlation module 2, FFT decision module 3, step adjustment module 4, code generation module 5, morning, middle and evening A correlator 6 , a peak hopping module 7 , a code loop phase detector 8 , a carrier loop phase detector 9 , a code loop filter 10 , and a carrier loop filter 11 .

[0025] The function of the quadrature de-frequency offset module 1 is to eliminate the carrier residual frequency offset of the navigation signal according to the frequency word obtained by capturing and tracking;

[0026] The function of the correlation module 2 is to carry out the correlation despreading of the navigation signa...

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Abstract

The invention discloses a configurable navigation signal compatible acquisition and tracking device. In an initial state, the navigation signal enters a correlation module after passing through an orthogonal frequency de-offset module, and the correlation module performs correlation despread processing on the navigation signal and sends it to FFT judgment Module, the FFT decision module outputs the capture success flag when the decision is successful, ends the capture process and starts tracking; when the capture fails, the step adjustment module selects different search steps according to the type of navigation signal input by the system, and the adjustment code generation module performs the next step. Acquisition process; after starting the tracking, the early, middle and late correlators output multi-channel correlation values, trigger the peak jumping module to make the secondary peak locking judgment, and if it is locked on the secondary peak, the step adjustment module will be prompted to perform 1 / 2 chip phase jumping, At the same time, the code loop phase detector and filter realize the real-time tracking of the pseudo code, and the carrier loop phase detector and filter complete the real-time tracking of the carrier. The device has the advantages of low processing difficulty, good compatibility and channel consistency.

Description

technical field [0001] The invention relates to the field of navigation signal acquisition and tracking, in particular to a configurable navigation signal compatible acquisition and tracking device, which is mainly used for acquisition and tracking of satellite navigation signals of old and new systems. Background technique [0002] With the rapid development of the Global Navigation Satellite System (GNSS), on the basis of the original Direct Spread Navigation Signal (DSSS-BPSK), a Binary Offset Carrier (BOC) modulation method has been developed, which effectively realizes common frequency band and frequency spectrum. Separation brings the advantages of better anti-interference and high-precision measurement. [0003] The design and implementation of GNSS navigation signals endows multiple systems with the ability to operate compatible with each other. Multi-system compatible operation mainly refers to the compatibility of signals and information processing of the three maj...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/29G01S19/30
CPCG01S19/29G01S19/30
Inventor 张前南陶磊岩杨春景尚佳栋
Owner BEIJING INST OF REMOTE SENSING EQUIP
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