An Approach for Efficient Cell Search in LTE-Advanced Systems
Date Issued
2012
Date
2012
Author(s)
Ho, Ying-Ping
Abstract
The most important procedure of wireless access is signal detection,initial time acquisition,carrier frequency synchronization and eNodeB identification when UE want to establish a link with eNodeB. The fallowing behavior is so called the initial cell search. In order to achieve the above information , eNodeB has to send the additional preamble to recognizethemselves. However, 3GPP LTE systems use two dedicated synchronization signals: Primary Synchronization Signal(PSS) and Secondary Synchronization Signal(SSS) to searching the serving cell identity. The initial cell search also has to identifyof CP length and duplex mode.
In this thesis, we propose a low complexity method to identify the cell identity as soon as possible.First we explain the procedure of synchronization and cell search, and use the phase difference of the PSS to joint detect the sector identity and integral part of the carrier frequency offset.And we also use the SSS to get the information of group identity and sub-frame index. This thesis aim to decrease the complexity of the PSS and SSS detection.According to the standard of 3GPP LTE , we find some special propertiesof synchronization. And make use of those propertiesto decrease the complexity of initial cell search, also maintain the detection performance is in the tolerable range.
Subjects
LTE-Advanced
Cell Search
Primary Synchronization Signal
Secondary Synchronization Signal
Carrier Frequency Offset
Synchronization
Type
thesis
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