Signal to noise ratio estimation-based frequency offset regulation method

A technology of signal-to-noise ratio estimation and adjustment method, which is applied to the shaping network, baseband system components, electrical components, etc. The effect of the algorithm

Inactive Publication Date: 2010-11-24
北京韦加航通科技有限责任公司
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a frequency offset adjustment method based on signal-to-noise ratio estimation to solve the p

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
  • Signal to noise ratio estimation-based frequency offset regulation method
  • Signal to noise ratio estimation-based frequency offset regulation method
  • Signal to noise ratio estimation-based frequency offset regulation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] The present invention introduces a frequency offset adaptive algorithm based on the existing frequency offset estimation algorithm and according to the unique data frame structure of the SC-FDE system. The algorithm is simple and easy to implement. On the basis of not changing the SC-FDE system, A frequency offset adaptive module is added to solve the problem of frequency offset estimation errors at the time of deep fading in wireless channels.

[0036] Such as figure 2 As shown, this solution uses the estimated frequency offset value of the previous frame as prior data, and uses the estimated signal-to-noise ratio of the current frame signal as an adaptive adjustment parameter to rea...

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 signal to noise ratio estimation-based frequency offset regulation method, which comprises the following steps of: setting an initial value SNR_reg of a signal to noise ratio register, and the corresponding initial value F_reg of a frequency offset register, and setting a counter n to be equal to 0; setting n to be equal to n+1, and acquiring an estimated frequency offset value Fn of the nth frame of data frames of a single carrier frequency domain equalization (SC-FDE) system; acquiring an estimated signal to noise ratio value SNRn of the nth frame; judging whether the SNRn is greater than the SNR_reg or not, and if the SNRn is greater than the SNR_reg, modifying the F_reg of the frequency offset register to be equal to Fn, and determining the estimated frequency offset value of a current frame to be Fn; if the SNRn is not greater than the SNR_reg, keeping constant the F_reg and modifying the estimated frequency offset value Fn of the current frame to be equal to F_reg; and repeating the steps, regulating the estimated frequency offset values Fn of all the frames. In the method, when a signal to noise ratio is estimated, pilot frequency data used for channel estimation is converted into a frequency domain on the basis of not changing the structure of the data frame for the characteristics of the SC-FDE system, so the accurate estimated signal to noise ratio value can be obtained, and is utilized to adaptively regulate frequency offset to well solve the problem that the estimated frequency offset value has an error under a low signal to noise ratio.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a frequency offset adjustment method based on signal-to-noise ratio estimation. Background technique [0002] At present, with the rapid increase in demand for new communication services, higher requirements are placed on the transmission rate of wireless communication systems and wireless local area networks, and the increase in transmission rate brings increased carrier frequency offset, Issues such as intersymbol interference (ISI, intersymbol-interference) and deep frequency selective fading. Single Carrier Frequency Domain Equalization (SC-FDE, Single Carrier Frequency Domain Equalization) can well solve the above problems. [0003] SC-FDE technology needs to insert a cyclic prefix and perform frequency domain equalization. At the same time, this method sends signals in a symbol block structure, which requires high synchronization at the receiving end...

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
IPC IPC(8): H04B1/707H04L25/02H04L25/03
Inventor 吴南润郑波浪任琦
Owner 北京韦加航通科技有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap