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Method for obtaining self-adaptive vector tracking loop

A technology of vector tracking loop and implementation method, applied in the field of adaptive vector tracking loop, can solve problems such as difficulty in accurately tracking signals, and achieve the effect of improving tracking performance

Active Publication Date: 2019-03-15
BEIHANG UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for implementing an adaptive vector tracking loop in order to overcome the shortcomings of traditional tracking loops that are difficult to accurately track signals under high dynamic and strong interference conditions

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  • Method for obtaining self-adaptive vector tracking loop
  • Method for obtaining self-adaptive vector tracking loop
  • Method for obtaining self-adaptive vector tracking loop

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Embodiment Construction

[0043]The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0044] The present invention is a realization method of an adaptive vector tracking loop, and the structure of the adaptive vector tracking loop is as follows: figure 1 As shown, the implementation method flow is as follows image 3 As shown, the specific steps are as follows:

[0045] Step 1: Obtain estimated values ​​of various tracking parameters through capture and scalar tracking, and assign them to vector tracking parameters to complete initialization;

[0046] Step 2: The intermediate frequency signal is sent into the noise estimation channel, and the intermediate frequency signal is correlated with the local carrier and a group of unused pseudo codes, and the correlation result I P0 , Q P0 for estimating noise power;

[0047] Step 3: The intermediate frequency signal is sent to the tracking channel, and the correlation calculation is carried out wi...

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Abstract

The invention provides a method for obtaining a self-adaptive vector tracking loop. The method includes the following steps of firstly, initiating vector tracking parameters; secondly, sending intermediate-frequency signals into a noise estimating channel, and estimating noise power; thirdly, sending the intermediate-frequency signals into a tracking channel, and conducting relevant calculating; fourthly, estimating the carrier-to-noise ratio to adjust the measuring noise matrix of a channel filter; fifthly, estimating a carrier frequency error delta fi, a code phase error delta ti and other parameters with the relevant result as the measuring information of the channel filter; sixthly, conducting ratio converting on the delta fi and the delta ti to obtain a pseudo range error delta pi anda pseudo range rate error delta pi' to be sent into a navigation filter, and estimating a position modification amount delta p and a speed modification amount delta v; seventhly, calculating a code phase modification value delta ti' and a carrier frequency modification value delta fi', and feeding back the code phase modification value and the carrier frequency modification value to a carrier numerical control oscillator (NCO) and a code numerical control oscillator (NCO). The stable tracking of navigation signals under high-dynamic strong-interference conditions is realized; in addition, byorganizing information of all channels into one measuring vector, the combined tracking of different satellite signals is realized.

Description

technical field [0001] The invention provides a method for realizing an adaptive vector tracking loop, which is applied to the tracking loop of a receiver, can effectively improve the tracking performance of the receiver in complex environments such as high dynamics and strong interference, and belongs to the technical field of navigation. Background technique [0002] The satellite navigation system can provide all-weather, all-time, high-precision positioning, navigation and timing services, and has very broad uses and development prospects. Satellite navigation can be used for precise navigation in fields such as motor vehicles, drones, missiles, and manned spaceflight. In the above application fields, complex environments such as high dynamics and strong interference have brought great challenges to the tracking loop of the receiver, mainly due to the following two aspects: [0003] (1) Under high dynamic conditions, drastic changes in the position and speed of the rece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/37G01S19/29G01S19/30G01S19/21
CPCG01S19/21G01S19/29G01S19/30G01S19/37
Inventor 刘宇陈鼎王新龙王盾
Owner BEIHANG UNIV
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