Time slot synchronization method for resisting sampling clock frequency deviation in WCDMA (Wideband Code Division Multiple Access) system

A technology of frequency deviation and time slot synchronization, which is applied in the field of communication and can solve problems such as implementation complexity

Inactive Publication Date: 2010-12-22
SHANGHAI JIAO TONG UNIV
View PDF1 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods have their own advantages and disadvantages, and there is a certain complexity in implementation.

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
  • Time slot synchronization method for resisting sampling clock frequency deviation in WCDMA (Wideband Code Division Multiple Access) system
  • Time slot synchronization method for resisting sampling clock frequency deviation in WCDMA (Wideband Code Division Multiple Access) system
  • Time slot synchronization method for resisting sampling clock frequency deviation in WCDMA (Wideband Code Division Multiple Access) system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0050] Such as figure 2 As shown, the schematic block diagram of the working principle structure in the implementation process of this embodiment, the structure of this embodiment includes a frequency deviation estimation and compensation module 201, an equal interval down-sampling module 202, a main synchronization code correlator group 203, and a correlation value normalization module 204 , a correlation value comparison and selection module 205 , a time slot boundary point search module 206 , and a time slot boundary point serial number calculation module 207 .

[0051] Such as image 3 As shown, this embodiment includes the following steps:

[0052] Step 301, according to the frequency deviation estimation method described in the first step in the summary of the invention, the frequency deviation estimation is performed on the input 8 times oversampled digital baseband signal, and the frequency deviation estimation value Δf is obtained e ; According to the estimated val...

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 time slot synchronization method for resisting sampling clock frequency deviation in a WCDMA (Wideband Code Division Multiple Access) system in the technical field of communication. The time slot synchronization of a downgoing signal in the WCDMA system is completed by steps of: carrying out high-rate oversampling on an input signal, wherein the sampling rate is chippingrate of 6-10 multiples; dividing the input signal into multiple paths of signal searching time slot boundaries after downsampling; and finally finding out a correct time slot boundary point with a comparison and combination method. The invention not only can eliminate the influence of the sampling clock frequency deviation to the time slot synchronization in the initial synchronization period, but also needs no extra sampling clock synchronization device compared with the prior art; and moreover, the system has the advantages of lower complexity and less resource consumption, which ensures the synchronization time to be greatly shortened.

Description

technical field [0001] The present invention relates to a method in the field of communication technology, in particular to a method for countering sampling clock frequency deviation in a WCDMA (abbreviation for Wideband CDMA, Wideband Code Division Multiple Access) system of Frequency Division Duplexing mode. slot synchronization method. Background technique [0002] The broadband code division multiple access system is a third-generation mobile communication system specifically formulated by 3GPP, based on the GSM MAP core network, and using the UMTS Terrestrial Radio Access Network (UMTS Terrestrial Radio Access Network) as the wireless interface. Unlike the other two third-generation mobile communication systems (CDMA2000 and TD-SCDMA), the WCDMA system is an asynchronous wireless communication system. Therefore, before the mobile station communicates with the base station in the cell, it must be in a synchronized state with the base station, that is, the mobile station...

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): H04B1/707
Inventor 赵勒甘小莺杨峰钱良
Owner SHANGHAI JIAO TONG UNIV
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