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Method and device for normalized power processing and cell search

A cell search and normalization technology, applied in the field of cell search, can solve the problem of not further utilizing the characteristics of the frame structure feature window, and achieve the effect of obvious maximum correlation peak value and increased accuracy.

Active Publication Date: 2009-09-16
LEADCORE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] It can be seen from the above description that the direct correlation method for power normalization only uses the correlation characteristics of the SYNC_DL signal itself, but does not further use the characteristic window characteristics of the frame structure

Method used

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  • Method and device for normalized power processing and cell search
  • Method and device for normalized power processing and cell search
  • Method and device for normalized power processing and cell search

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Embodiment Construction

[0059] The basic idea of ​​the present invention is: assume that the initial chip involved in the correlation operation is the initial chip of SYNC_DL, thereby determining a subframe, from the 32 chips of the DwPTS as the GP and 96 of the GP in the subframe Chips, 32 chips used as GP in UpPTS, and the last 16 chips of each ordinary time slot, the power of any chip in a total of 272 chips is added to the calculation of power sum as power normalization The denominator in chemical processing.

[0060] Hereinafter, the implementation of the cell search method and device of the present invention will be described in detail through specific embodiments in conjunction with the drawings.

[0061] image 3 It is a schematic diagram of the flow of the cell search method of the present invention, such as image 3 As shown, the method includes:

[0062] Steps 301~302: and figure 2 The processing flow of steps 201 to 202 shown is the same.

[0063] Step 303: Perform power normalization proce...

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Abstract

The invention provides a cell search method which comprises the following steps: when normalized power processing is carried out to first correlation values, the power sum of 65 to 336 code chips including 64 code chips which participate in the correlation operation is first counted; and then, the normalized power processing is carried out to the corresponding first correlation values according to the power sum to obtain a maximum correlation value. The invention also provides a method and a device for the normalized power processing and a device for realizing the cell search. The method and the devices can cause the maximum correlation peak value corresponding to SYNC_DL to be more obvious and improve the correctness in checking downlink pilot signals.

Description

Technical field [0001] The present invention relates to cell search technology, in particular to a method and device for power normalization processing and cell search. Background technique [0002] In a mobile communication system, after a terminal (UE, User Equipment) is turned on, it first performs a cell search. The purpose of the cell search is to select a suitable operating frequency and obtain downlink synchronization between the terminal and the base station on this frequency, so that the terminal can In the fast access communication system, the information of the cell is received, and communication is realized through calls. [0003] Downlink synchronization is an important step in the cell search process, requiring the use of downlink synchronization detection algorithms to quickly and accurately determine the timing position of the downlink pilot signal. In the following, a time division synchronous code division multiple access (TD-SCDMA) system is taken as an example...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B1/7083
Inventor 王玉
Owner LEADCORE TECH