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

Park Kyung-won (전자부품연구원 DxB 통신융합연구센타)
Cho Yong-soo (중앙대학교 전자전기공학부 디지탈통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.9A, 2005 , pp. 781-787 More about this Journal
Abstract
In this paper, an estimation method of intercell carrier frequency-offset(CFO) in orthogonal frequency division multiplexing(OFDM)-based cellular systems is proposed for a user's equipment(UE), especially at the cell boundary, in downlink channels. Also, after deriving an estimation method of 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.
Keywords
OFDM; Intercell carrier frequency-offset; cell-searching; ICI; Cellular system;
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