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Pseudo-satellite vector tracking receiver design method based on positioning quality evaluation fingerprints

A vector tracking and quality evaluation technology, applied in the field of navigation and positioning, can solve the problems of poor positioning accuracy of pseudolite receivers, etc., and achieve the effects of improved accuracy, strong tracking ability, and high robustness

Pending Publication Date: 2022-03-01
SOUTHEAST UNIV
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Problems solved by technology

[0004] Technical problem: the present invention should focus on solving the problem of poor positioning accuracy of pseudolite receivers under indoor complex multipath conditions

Method used

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  • Pseudo-satellite vector tracking receiver design method based on positioning quality evaluation fingerprints
  • Pseudo-satellite vector tracking receiver design method based on positioning quality evaluation fingerprints
  • Pseudo-satellite vector tracking receiver design method based on positioning quality evaluation fingerprints

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Experimental program
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Effect test

Embodiment

[0032] S1. Simultaneously filter the carrier and the C / A code by using a vector tracking filter to generate a code offset value and a carrier offset value.

[0033] The first step is to use ordinary filters for positioning, and use the positioning results for the initialization of vector tracking filters. Ordinary filters are used for positioning, and when the positioning is stable, two consecutive positioning result vectors are collected where x 1 ,y 1 ,z 1 Represents the value of the position coordinates in the three directions of x, y, and z in the first positioning result, Represents the value of the velocity vector in the three directions of x, y, and z, t b1 represents clock difference, t d1 Represents clock drift. The initial value of the state vector of the vector tracking filter

[0034] It represents the error value of each data in the positioning result. The position vector initial value L (0) of vector tracking filter=[x 2 ,y 2 ,z 2 ] T , the init...

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Abstract

The invention provides a pseudo-satellite vector tracking receiver design method based on positioning quality evaluation fingerprints, which comprises the following steps of: S1, simultaneously filtering a carrier and a C / A code by adopting a vector tracking filter to generate a code offset value and a carrier offset value; s2, performing quality evaluation on intermediate signals such as intermediate frequency signals, C / A codes and the like and various characteristic parameters in capturing, correlation, filtering and other positioning processes to obtain a series of evaluation indexes such as power spectrum characteristics, S curve deviation values and the like; s3, updating the fingerprint database by using the obtained evaluation indexes; s4, performing parameter adjustment on modules such as a code generator, a code NCO, a code discriminator and a vector tracking filter by using data in the fingerprint database to obtain a new quality evaluation index, updating the fingerprint database again, and continuously circulating; according to the invention, the positioning environment can be quantitatively analyzed and recorded, and the algorithm parameters of the receiver can be adjusted according to the characteristics of the positioning environment, so that the effect of improving the positioning precision in the indoor complex multipath environment is achieved.

Description

technical field [0001] The invention relates to a design method of a pseudolite vector tracking receiver based on a positioning quality evaluation fingerprint, and belongs to the technical field of navigation and positioning. Background technique [0002] In terms of indoor positioning, the current research directions mainly include WIFI positioning, SLAM positioning, UWB positioning and pseudolite positioning. Among them, pseudolite technology has the advantages of high precision and seamless indoor and outdoor positioning, and is a relatively effective indoor positioning method. However, various walls and debris in the room will generate a large number of complex multipath signals, so multipath signals have become the main reason for interfering with indoor positioning accuracy. In recent years, in addition to many outdoor GNSS anti-multipath methods, many new anti-multipath methods have been applied to pseudolite positioning systems. [0003] At present, technologies cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
CPCG01S5/02524G01S5/0221
Inventor 王庆张波夏文清阳媛施上胡硕
Owner SOUTHEAST UNIV