Unlock instant, AI-driven research and patent intelligence for your innovation.

Timing synchronization system based on adaptive loop gain adjustment

A technology of adaptive adjustment and loop gain, which is applied in the field of aerospace measurement and control communication, and can solve the problem of increasing system complexity

Active Publication Date: 2020-12-11
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, directly adjusting the loop bandwidth requires recalculating the coefficients of the loop filter, resulting in higher system complexity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Timing synchronization system based on adaptive loop gain adjustment
  • Timing synchronization system based on adaptive loop gain adjustment
  • Timing synchronization system based on adaptive loop gain adjustment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0050] The present invention improves the existing Gardner synchronous loop. Gardner synchronization loops such as figure 1 As shown, it includes a matched filter, a difference filter, a decimator, a timing error discriminator, a loop filter and a numerically controlled oscillator; the matched filter receives the baseband signal r(t) input, and outputs the matched filtered signal y( t); the interpolation filter takes the matched filtered signal y(t) as input, and takes the sampling signals at two set moments, that is, at the moment t k and t k-1 / 2 Sampling the kth symbol to get the signal y(t k ) and y(t k-1 / 2 ), y(t k ) is output by the extractor; y(t k ) and y(t k-1 / 2 ) through the timing error discriminator to output the identification result, that is, the loop error, which contains noise and high-frequency components, and needs to be filtered ou...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a timing synchronization system based on adaptive loop gain adjustment. The system can realize the purpose of adjusting the loop bandwidth by adaptively adjusting the loop gainof a loop filter on the basis of a Gardner synchronization loop model so as to effectively balance the relationship between the timing synchronization tracking precision and the locking time. According to the system, a loop gain adjustment LGAA unit is additionally arranged on a Gardner timing synchronization loop. The LGAA unit is connected between a timing error discriminator and a loop filteron the Gardner timing synchronization loop; the LGAA unit takes an identification result of the timing error discriminator as input; and the normalized value ep<~> of the pth identification result output by the timing error discriminator is input into the loop filter. In the LGAA unit, the ep<~> is taken, the difference value between the ep<~> and the normalized value ep-1<~> of the (p-1)th identification result is taken as the input variable of a fuzzy controller, a fuzzified output result is obtained through a preset fuzzy rule, and the gain of the loop filter is updated.

Description

technical field [0001] The invention relates to the technical field of aerospace measurement and control communication, in particular to a timing synchronization system based on self-adaptive adjustment of loop gain. Background technique [0002] In the aerospace measurement and control communication system, the data information is modulated on the carrier at a certain symbol rate for transmission. The receiving end needs to judge the start position and end position of each data bit of the transmission signal, and constantly adjust the sampling pulse of the local data bit to make it It is located at the peak moment of the symbol to achieve the best receiving sampling and complete data demodulation. If the local data bit clock is not synchronized with the received signal data bit, the sampling judgment time is no longer the best sampling time, the judgment result may be wrong, and the demodulation bit error rate will increase. Therefore, timing synchronization performance det...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H03H21/00
CPCH03H21/00Y02D30/70
Inventor 王永庆申宇瑶史学森张春
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com