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Method for searching down synchronous signal position in mobile communication system

A mobile communication system and a technology for synchronizing signals, applied in the field of quickly completing the initial search of a cell, can solve the problems of not considering the impact of the search, the low success rate of the initial search of the cell, and the difficulty in the initial search of the cell, etc., so as to improve efficiency and accuracy. The effect of avoiding high-power signal interference

Active Publication Date: 2007-09-12
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

The biggest disadvantage of this search method is that it does not consider the influence of large signal interference around the terminal receiver, so the success rate of the initial cell search is low, that is, there is large signal interference around the mobile terminal receiver, such as nearby When a mobile user is making a call, the signal of the mobile user may be searched, which makes the initial search of the cell difficult to succeed

Method used

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  • Method for searching down synchronous signal position in mobile communication system
  • Method for searching down synchronous signal position in mobile communication system
  • Method for searching down synchronous signal position in mobile communication system

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Embodiment Construction

[0034] The invention searches the approximate position of the DwPTS through the saturated feature window method to complete the downlink synchronization. The main steps include:

[0035] First lock the frequency point on the frequency point to be synchronized (previously sort the frequency points according to the principle of receiving power from small to large, starting from the frequency with the highest power); then use automatic gain control to saturate the terminal receiver; When the receiver is saturated, continuously take several frames of data received by the receiver and transmitted by the base station, and use the characteristic window method to search for the synchronization head to determine the approximate position of the DwPTS; use the correlation code to perform correlation operations to determine the accurate position of the DwPTS.

[0036] The technology of the present invention will be further described below in conjunction with the drawings of the embodiments.

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Abstract

The invention relates to a method for searching downgoing synchronizing signal position in mobile communication system, including: regulating automatic gain of a receiver to saturate the receiver, and on the condition of the receiver being saturated, executing the follow steps: searching the rough position of downgoing synchronizing signal of one of multiple subframe data by using characteristic window determination method at some frequency point, and obtaining multiple rough positions, and finding the most possible rough position in multiple ones; succeeding in search and according to the most possible rough position, accurately regulating the downgoing synchronizing signal position l. It is a method adopting saturation method to search synchronizing signal position. It can avoid high-power interference, and can conveniently, exactly, effectively and quickly complete initial village searching.

Description

Technical field [0001] The present invention relates to mobile communication technology, and more specifically, to a method for quickly completing the initial cell search by searching for the position of the downlink synchronization signal in a mobile communication system such as a time division-synchronous code division multiple access (TD-SCDMA) mobile communication system. Background technique [0002] The initial cell search refers to the process of a mobile terminal (UE) from booting up to logging in to a suitable cell, abbreviated as ICS. For example, in the TD-SCDMA system, after the UE is powered on, it needs to search for possible cells, and then select the appropriate cell to log in. Only after logging in to the cell, the UE can obtain the information of neighboring cells and obtain more detailed information about the cell. Information, and further monitor paging on the network or initiate a call to establish a connection. [0003] Figure 1 shows a 5ms subframe structur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/36H04L7/00H04Q7/00
CPCH04B1/7073H04L7/10
Inventor 李世鹤顼文胜荆建丛海林孙嘉晨
Owner DATANG MOBILE COMM EQUIP CO LTD
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