Configurable navigation signal compatible capturing and tracking device

A navigation signal and tracking device technology, applied in the field of navigation signal acquisition and tracking

Active Publication Date: 2019-03-01
BEIJING INST OF REMOTE SENSING EQUIP
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  • Abstract
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  • 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 con

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  • Configurable navigation signal compatible capturing and tracking device
  • Configurable navigation signal compatible capturing and tracking device
  • Configurable navigation signal compatible capturing and tracking device

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Embodiment Construction

[0022] The 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] Step 1: Build a configurable navigation signal compatible capture 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 Correlator 6, peak hopping module 7, code loop phase detector 8, carrier loop phase detector 9, code loop filter 10, carrier loop filter 11.

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

[0026] The function of the correlation module 2 is to perform correlation despreading of the navigation signal according to the length of the acqui...

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Abstract

The invention discloses a configurable navigation signal compatible capturing and tracking device. In an initial state, a navigation signal enters a relevant module through an orthogonal frequency offset removing module, and the relevant module performs relevant despreading processing on the navigation signal and then sends the signal to a FFT judging module. The FFT judging module outputs a capture success sign after the judgment is successful, and ends a capture process and starts tracking. Under the condition of capture failure, a step adjustment module selects different search steps according to navigation signal types input by the system, and an adjustment code generation module performs a next capture process. After starting the tracking, an early-middle-late correlator outputs a plurality of paths of correlation values, triggering a peak jump module to perform secondary peak locking judgment. If locked on a secondary peak, the step adjustment module is promoted to perform 1/2 chip phase jump. At the same time, a code ring phase discriminator and a filter realize real-time tracking of pseudo codes, and a carrier loop phase discriminator and the filter complete real-time tracking of carrier. The device has advantages of low processing difficulty, good compatibility and good 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 the acquisition and tracking of satellite navigation signals of new and old systems. Background technique [0002] With the rapid development of the global satellite navigation system (GNSS), based on the original direct-spread navigation signal (DSSS-BPSK), people have developed a binary offset carrier (BOC) modulation method, which effectively realizes the common frequency and spectrum Separation brings advantages such as better anti-interference and high-precision measurement. [0003] The design and implementation of GNSS navigation signals gives multiple systems the ability to operate compatible with each other. Multi-system compatible operation mainly refers to the compatibility of the signal and information processing of the three major navigation systems...

Claims

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Application Information

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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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