A Method of Intercell Carrier Frequency-Offset Estimation and Cell-Searching for Downlink in OFDM-Based Cellular Systems

Kyung Won PARK
Yong Soo CHO

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B    No.7    pp.2088-2091
Publication Date: 2006/07/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.7.2088
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
OFDM,  intercell carrier frequency-offset,  cell searching,  

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Summary: 
In this letter, a method estimating the intercell carrier frequency-offset (CFO) in orthogonal frequency division multiplexing (OFDM)-based cellular systems is proposed for the user's equipment (UE), especially at the cell boundary, in downlink channels. After describing a new method of deriving the intercell CFO from the signals received by adjacent base stations (BSs), we propose a cell-searching method using the estimated CFOs. It is shown by computer simulation that the proposed methods can uniquely estimate the intercell CFOs and identify the target BS with a high detection probability at the UE.