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LTE system cell searching method

A cell search and normalization technology, applied in orthogonal multiplexing systems, access restrictions, electrical components, etc., and can solve complex and computationally heavy problems

Active Publication Date: 2018-09-04
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

When this method detects PSS, each slide needs to be correlated with three sets of local PSS signals, which is computationally intensive and complicated

Method used

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Experimental program
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Embodiment Construction

[0066] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0067] Depend on figure 1 It can be seen that part A is the regular CP of the OFDM symbol containing the PSS, and A+B is the extended CP of the OFDM symbol containing the PSS. Respectively correlate the CP of part A and part B with their respective data source parts: if it is an extended CP, parts A and B are both CP parts, and the correlation values ​​of both parts are high; and if it is a regular CP, its B Part B will have a low correlation value due in part to the data portion of the SSS versus the data portion of the PSS.

[0068] Depend on figure 2 It can be seen that the positional relationship between the PSS and the SSS is adjacent, separated by 2, 66 or 68 OFDMs. When calculating the peak position of the metric function, the positions of PSS and SSS can be obtained according to the peak position difference.

[0069] Such as ...

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Abstract

The invention relates to an LTE system cell searching method, and belongs to the technical field of communication tests. In the method, a slipping correlation algorithm is firstly used for acquiring aCP type and a position thereof, then PSS and SSS signals can be synchronously acquired according to the positions of the PSS and SSS in a frame structure, the situation that each slipping correlationneeds to be correlated to three sets of local signals when PSS detection is performed, the CP type and the PSS and SSS signals can be acquired by using the slipping correlation just once, and the computing amount is greatly reduced while the cell searching accuracy is ensued. According to the method provided by the invention, the problem that in the LTE-A system, the cell searching process is tedious and the computing amount is large is solved, and thus the purpose of quickly and accurately searching the cell is achieved.

Description

technical field [0001] The invention belongs to the technical field of communication testing, and relates to a cell search method of an LTE system. Background technique [0002] LTE (Long Term Evolution, long-term evolution) is a long-term evolution of the UMTS technical standard formulated by the 3GPP organization. It was officially established and launched at the 3GPP Toronto TSGRAN#26 meeting in December 2004. In June 2010, the 3GPP organization submitted a report on the technical requirements of the subsequent evolution of LTE technology (Long Term Evolution Advanced, LTE-A). In the LTE-A system, the user equipment UE needs to initialize synchronization and establish a connection with the base station , cell search and synchronization must be performed first. This is a relatively complicated process, which needs to complete time synchronization, frequency offset estimation and frequency offset compensation, acquisition of cell ID information, acquisition of broadcast in...

Claims

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Application Information

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IPC IPC(8): H04J11/00H04W48/16
CPCH04J11/0069H04W48/16
Inventor 李琳潇张治中程方李慧敏胡晓玲
Owner CHONGQING UNIV OF POSTS & TELECOMM
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