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GNSS receiver baseband processing module with loop assistance

A technology of baseband processing module and auxiliary module, applied in satellite radio beacon positioning systems, measurement devices, instruments, etc., can solve problems such as poor fusion degree and failure to achieve global optimization, so as to avoid performance degradation and improve information. The effect of noise ratio

Active Publication Date: 2014-08-06
TSINGHUA UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The present invention aims to solve at least to a certain extent one of the technical problems of poor integration and failure to achieve global optimization in related technologies

Method used

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  • GNSS receiver baseband processing module with loop assistance
  • GNSS receiver baseband processing module with loop assistance

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Embodiment Construction

[0015] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0016] The GNSS receiver baseband processing module with loop assistance in the embodiment of the present invention includes a carrier loop and a code loop. Among them, the carrier loop includes a carrier loop tracking auxiliary module, wherein the carrier loop tracking auxiliary module is used to remove the dynamic influence of the GNSS receiver on the carrier loop, improve the dynamic tracking performance of the carrier loop, and eliminate the gap between the loop bandwidth and the dynamic stress. contradiction. The code ring ...

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Abstract

The invention discloses a GNSS receiver baseband processing module with loop assistance. The module comprises a carrier ring and a code ring, wherein the carrier ring comprises a carrier ring tracking auxiliary module used for eliminating influences of dynamic of a GNSS receiver on the carrier ring, improving dynamic tracking performance of the carrier ring and eliminating contradictions between loop bandwidth and dynamic stress; the code ring comprises a code ring tracking auxiliary module, the code ring tracking auxiliary module is used for improving code tracking precision and generating drive signals by addition of inertial navigation speed information corrected through a Kalman filter and the corresponding pseudo-range rate information and low-pass filter output quantity, and the drive signals control predicted signal delay so that the code ring can only track remaining inertial navigation auxiliary errors and loop dynamic characteristics can be improved. The GNSS receiver is integrated with SINS information by reading in-phase / orthogonal information of a correlator level, dynamic stress is eliminated, the tracking loop filter bandwidth is reduced, loop measurement noise is lowered, the signal to noise ratio is improved, and global optimum is achieved.

Description

technical field [0001] The invention relates to the technical field of signal receiving and processing, in particular to a GNSS receiver baseband processing module with loop assistance. Background technique [0002] Global Navigation Satellite System (GNSS, Global Navigation Satellite System) is a satellite-based radio navigation system, which includes satellite constellations, ground monitoring systems and user terminal equipment, and can provide all-weather navigation for various carriers on land, sea and air. , Uninterrupted, high-precision, real-time navigation and positioning services. GNSS navigation errors do not accumulate over time, but the low update rate of GNSS data will cause frequency and phase tracking errors to oscillate in low signal-to-noise ratio and high dynamic environments. The strapdown inertial navigation system can withstand higher dynamic stress, has good short-term performance and is free from interference. In order to realize the complementary a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/29G01S19/30G01S19/35
CPCG01S19/29G01S19/30G01S19/37G01S19/47G01S19/49
Inventor 郑伦贵尤政张高飞赵开春马林王晓初
Owner TSINGHUA UNIV
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