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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • 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

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[0055] The core of the present invention is to use the time-domain repetition characteristics of the received sequence in a mobile communication system with a pilot time slot for downlink synchronization in the downlink direction to perform shift correlation on the received sequence to obtain a sequence of differential correlation values. The position where the largest 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 strong signal interference in the uplink time slot in the system, the amplitude normalization process can be performed on the differential correlation value sequence first, and then the position of the largest correlation peak after the normalization process is determined. Is the position of the downlink synchronization symbol.

[0056] In order to enable those skilled in the art to better understand the solution of the present inv...

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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

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Application Information

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IPC IPC(8): H04B7/26H04L27/26
Inventor 于洋孙韶辉王映民韩波
Owner DATANG MOBILE COMM EQUIP CO LTD
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