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An adaptive gnss carrier multi-loop tracking device and method

A tracking device and self-adaptive technology, used in measurement devices, radio wave measurement systems, instruments, etc., to ensure accuracy, improve reliability and stability, and improve accuracy.

Active Publication Date: 2020-12-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional receivers use fixed bandwidth, which is difficult to solve the tracking problem of high dynamics and weak signals. Therefore, designing a multi-loop with adaptively adjusted bandwidth, order and integration time is an effective solution.

Method used

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  • An adaptive gnss carrier multi-loop tracking device and method
  • An adaptive gnss carrier multi-loop tracking device and method
  • An adaptive gnss carrier multi-loop tracking device and method

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Embodiment Construction

[0023] combine figure 1 As shown, an adaptive GNSS carrier multi-loop tracking device (abbreviated as the device) is disclosed in the embodiment, which mainly includes a Doppler estimator, an integrator, an output fuser and four parallel adaptive sub-loop modules ( referred to as the sub-loop). Each sub-loop is configured with a phase detector, a fuzzy logic bandwidth controller, a loop filter, a carrier NCO, a multiplier, a tracking fuser and an integrator. The input signals involved mainly include the carrier signal (that is, the carrier signal output by the front end), the intermediate frequency (that is, the center frequency of the sampler), and the capture Doppler frequency (that is, the capture of the initial Doppler frequency provided to the tracking loop).

[0024] The adaptive sub-loop can use PLL tracking loops with different orders and different integration times. The four adaptive sub-loop modules adopted by the device in the embodiment are specifically: sub-loop...

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Abstract

The invention discloses a self-adaption GNSS carrier multi-loop tracking device and method. The self-adaption GNSS carrier multi-loop tracking device comprises a Doppler estimator, an integrator, an output fusion cage and N self-adaption sub-loop modules, and each self-adaption sub-loop module is provided with a phrase discriminator, a fuzzy logic bandwidth controller, a loop filter, a carrier NCO, a multiplier, a tracking fusion cage and an integrator. The self-adaption GNSS carrier multi-loop tracking device can keep carrier tracking stable in high-dynamic and weak signal environments, provides effective schemes for developing receivers with wider universality, and has practical engineering significance based on carrier tracking technology of multi-loop and fuzzy variable bandwidth.

Description

technical field [0001] The invention belongs to the field of GNSS baseband signal processing, and in particular relates to a GNSS carrier multi-loop tracking technology for adaptively adjusting parameters. Background technique [0002] The rapid development of various fields such as intelligent transportation, aerospace, pedestrians, and indoor navigation has expanded the application scope of the Global Navigation Satellite System (GNSS), and at the same time put forward higher requirements for the Global Navigation Satellite System. Due to the complex terrain of urban canyons, building shelters, and forests and mountains, the power of satellite signals is severely attenuated, and it is very easy to cause the GNSS receiver to lose lock and fail to locate. Therefore, improving the tracking ability in weak signal environments has become a key issue in the fields of geodesy, urban traffic navigation and other navigation requirements. In addition, the application of GNSS in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/29G01S19/37
CPCG01S19/29G01S19/37
Inventor 许睿丁梦羽赵宏宇韩志凤孟骞刘建业曾庆化
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS