Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Carrier-wave frequency deviation estimation method in communication system, apparatus and system therefor

A carrier frequency offset, communication system technology, applied in the field of communication, can solve the problems of inability to meet the communication system, low bit error rate index, etc., and achieve the effect of overcoming the impact, high SNR, and improving the range

Inactive Publication Date: 2007-06-13
HUAWEI TECH CO LTD
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For multi-carrier systems, this will introduce ICI, which cannot meet the lower bit error rate indicators required by communication systems

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
  • Carrier-wave frequency deviation estimation method in communication system, apparatus and system therefor
  • Carrier-wave frequency deviation estimation method in communication system, apparatus and system therefor
  • Carrier-wave frequency deviation estimation method in communication system, apparatus and system therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0068] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0069] The main idea of ​​the present invention is: firstly, at the receiving end, zero padding is performed on the received synchronous pilot sequence in the time domain, and the Fourier transform is performed on the zero-padded synchronous pilot sequence to obtain the frequency domain oversampling of the synchronous pilot sequence ; Then, on the frequency domain oversampled spectrum of the synchronous pilot sequence, calculate the sum of the power spectrum amplitudes of the subcarrier sequences with the same frequency interval according to the interval of the single-frequency pilot signal to obtain the measurement sequence, where the calculated subcarrier The interval of the carrier signal corresponds to the interval between the pilo...

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 method includes following procedures: receiving synchronizing pilot sequence, and obtaining oversampling in frequency domain for synchronizing pilot sequence; on discrete frequency spectrum of oversampling in frequency domain in synchronizing pilot sequence, calculating square of amplitudes of discrete frequency spectrum lines, and summarizing them in order to obtain measure sequence; based on measure sequence to carry out estimation for carrier frequency shift. The invention increases precision of estimating carrier frequency shift, and range of estimation remarkably without increasing complexity.

Description

technical field [0001] The present invention relates to the technical field of communication, more specifically, a method, a device and a system for estimating carrier frequency offset in a communication system. Background technique [0002] At present, Global System for Mobile Communications (GSM) and Code Division Multiple Access Mobile Communication System (CDMA) have been widely used all over the world, while Wideband Code Division Multiple Access Mobile Communication System (WCDMA) and Wideband Code Division Multiple Mobile communication systems such as Multiple Access Mobile Communication System 2000 (CDMA2000) have also been applied to a certain extent within a certain range. Orthogonal frequency division multiplexing (OFDM) technology has the ability to resist inter-symbol interference (ISI) and can provide high spectral efficiency, so it is regarded as one of the most likely transmission technologies for the next generation of wireless mobile communication systems. ...

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): H04L27/26
Inventor 杨学志孙卫军杜高科
Owner HUAWEI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com