A downlink synchronous signal positioning method and device

A technology of synchronous signal and positioning method, which is applied in the communication between multiple stations, electrical components, transmission systems, etc., can solve the problems of low synchronization efficiency and large amount of calculation, and achieve improved synchronization efficiency and resistance to noise influence ability, the effect of reducing the amount of calculation

Active Publication Date: 2007-10-24
SHANGHAI ULTIMATE POWER COMM TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide a downlink synchronization signal positioning method to solve the existing technical problems of low synchronization efficiency due to the large amount of calculation when performing downlink synchronization signal positioning

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  • A downlink synchronous signal positioning method and device
  • A downlink synchronous signal positioning method and device
  • A downlink synchronous signal positioning method and device

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Embodiment Construction

[0033] The core of the present invention is to use the time-domain repetition characteristic of the downlink synchronization signal to shift and correlate the received sequence to obtain a differential correlation value sequence, and determine the downlink synchronization symbol by searching the maximum correlation peak or the maximum correlation peak platform in the differential correlation value sequence s position. 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 power normalization processing on the differential correlation value sequence first, and then search for the maximum The correlation peak or the maximum correlation peak platform determines the position of the downlink sync symbol.

[0034] In order to enable those skilled in the art to better understand the solution of the present invention, the following takes the TD-SCDMA evolution system as an example and fur...

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Abstract

The disclosed location method for down synchronous signal comprises: shifting the received signal sequence for correlation, and obtaining the difference correlative value sequence; accordingly, searching the maximal correlative object to determine the down signal position. The relative device comprises a difference correlation unit and a connected detection unit.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a positioning method and device for a downlink synchronization signal. Background technique [0002] In a wireless communication system, after a UE (User Equipment) is turned on, the first thing to do is to perform a cell initial search process. The purpose of cell initial search is to enable user equipment to select a suitable working frequency point, and obtain downlink synchronization between the terminal equipment and the base station on this frequency point, so as to receive cell information and realize communication functions through calls. Therefore, downlink synchronization is an important step in the initial cell search process. Its purpose is to determine the start position of the subframe of the received signal. At present, the start position of the subframe of the received signal is mainly determined by locating the downlink synchronization signal. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04B1/707
Inventor 于洋孙韶辉王映民
Owner SHANGHAI ULTIMATE POWER COMM TECH
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