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

Downlink synchronization method and device of the mobile communication system

A technology of mobile communication system and synchronous symbols, which is applied in the field of mobile communication, can solve the problems of reducing computational complexity and large amount of calculation, and achieve the effects of reducing calculation amount, eliminating the influence of strong signal interference, and improving practicability

Active Publication Date: 2007-08-15
DATANG MOBILE COMM EQUIP CO LTD
View PDF0 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a downlink synchronization method for a mobile communication system, so as to overcome the disadvantage of a large amount of calculation when judging the position of a downlink synchronization signal in the prior art, and realize that there is a pilot time slot for the terminal to perform downlink synchronization in the downlink direction The downlink synchronization of the mobile communication system reduces the computational complexity of the 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
  • Downlink synchronization method and device of the mobile communication system
  • Downlink synchronization method and device of the mobile communication system
  • Downlink synchronization method and device of the mobile communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The core of the present invention is to use the time-domain repetition characteristics of the received sequence to perform shift correlation on the received sequence to obtain the differential correlation value sequence in a mobile communication system with a pilot time slot for downlink synchronization of the terminal in the downlink direction, according to The position where the maximum correlation peak appears in the differential correlation value sequence determines the position of the downlink synchronization symbol. Furthermore, in order to eliminate the influence of the strong signal interference of the uplink time slot in the system, it is also possible to perform amplitude normalization processing on the differential correlation value sequence first, and then determine the position of the largest correlation peak after the normalization processing is the position of the downlink sync symbol.

[0056] In order to enable those skilled in the art to better underst...

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 disclosed down synchronization method for a communication system comprises: obtaining sequence to shift and obtain difference sequence; taking the position with largest correlative peak as the down synchronization signal position. This invention makes UE fast and accurate complete the down synchronization.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a downlink synchronization method and device of a mobile communication system with pilot time slots for terminals to perform downlink synchronization in the downlink direction. Background technique [0002] TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) is the only system that adopts time division duplex mode among the three international standards of the third generation mobile communication system. It supports uplink and downlink asymmetric service transmission and has great advantages in spectrum utilization. flexibility. The system comprehensively adopts advanced technologies in wireless communication such as smart antenna, uplink synchronization, joint detection and software radio, so that the system has high performance and spectrum utilization. [0003] The existing TD-SCDMA system is a system with a chip rate of 1.28Mcps and a ban...

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): H04B7/26H04L27/26
Inventor 于洋孙韶辉王映民韩波
Owner DATANG MOBILE COMM EQUIP 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