Method, device and terminal for realizing downlink synchornization

A technology of synchronization point and synchronization sequence, which is applied to synchronization devices, communication between multiple stations, electrical components, etc., can solve the problems of long synchronization access time and consumption of large DSP resources, and achieves faster speed and resource saving. , the effect of shortening the synchronization time

Inactive Publication Date: 2009-09-30
HUAWEI TECH CO LTD
View PDF0 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the synchronization method of the above-mentioned prior art, when correlating each sampling point of the received signal, it is necessary to do L times of complex multiplication (for example, L=128 in LTE) and L times of complex number additions, and LTE half-frame wireless signals share T=9600 sampling points, so when the terminal is...

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
  • Method, device and terminal for realizing downlink synchornization
  • Method, device and terminal for realizing downlink synchornization
  • Method, device and terminal for realizing downlink synchornization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] In the embodiment of the present invention, in the time synchronization process, the synchronization process is divided into two steps of time coarse synchronization and time fine synchronization; wherein, the time coarse synchronization is to correlate the received signal by using the information of part of the synchronization channel to determine the coarse synchronization point; Fine synchronization is to use the information of all synchronization channels to search before and after the coarse synchronization point determined by coarse synchronization and perform sliding correlation to determine the precise synchronization time point position.

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the e...

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 embodiment of the invention relates to a method for realizing downlink synchronization comprises: generating a new local synchronization sequence, carrying out a first stage slide correlation by using the new sequence and the receiving signal; determining crude synchronization point, wherein the new sequence carries part of synchronous channel information; carrying out a second state slide correlation at front or back of crude synchronization point determined by the first stage slide correlation to determine present time synchronization point. The embodiment of the invention relates to a device for realizing downlink synchronization. The method and device of the present embodiment determines precise synchronous time point position by two synchronization, largely shortens synchronization time of access to network, saves large quantity of resource, effectively quickens access speed to network for user.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method, device and terminal for realizing downlink synchronization. Background technique [0002] With the development of mobile communication technology, the 3GPP organization has proposed the next generation mobile communication wireless access technology: LTE (LTE Long Term Evolution, long-term evolution) technology; The base station performs time synchronization; the current common practice is to use the local synchronization sequence of the terminal to correlate with the signal sent by the base station to find the synchronization signal periodically sent by the base station in the downlink signal, so that the terminal can know the start of the downlink transmission wireless frame of the base station position, and perform follow-up processing such as demodulation according to the initial position: according to the current LTE protocol, there will be a s...

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): H04B7/26H04B1/707H04W56/00H04W88/02
Inventor 张彦宋毅
Owner HUAWEI TECH CO LTD
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