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CLC number: TN929.5
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Received: 2006-05-11
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A novel cell search scheme for OFDM cellular systems
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DING Ming, LUO Han-wen, WU Yun. A novel cell search scheme for OFDM cellular systems[J]. Journal of Zhejiang University Science A, 2007, 8(1): 10-17.
@article{title="A novel cell search scheme for OFDM cellular systems",
author="DING Ming, LUO Han-wen, WU Yun",
journal="Journal of Zhejiang University Science A",
volume="8",
number="1",
pages="10-17",
year="2007",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2007.A0010"
}
%0 Journal Article
%T A novel cell search scheme for OFDM cellular systems
%A DING Ming
%A LUO Han-wen
%A WU Yun
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%P 10-17
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.A0010
TY - JOUR
T1 - A novel cell search scheme for OFDM cellular systems
A1 - DING Ming
A1 - LUO Han-wen
A1 - WU Yun
J0 - Journal of Zhejiang University Science A
VL - 8
IS - 1
SP - 10
EP - 17
%@ 1673-565X
Y1 - 2007
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2007.A0010
Abstract: A novel cell search scheme for OFDM cellular systems is proposed. It is based on one OFDM symbol with several identical slots as preamble, the time domain repetition structure of which can be utilized to accomplish OFDM timing/frequency synchronization. The cell ID is comprised of two parts: a sub-carrier mask index g and a sequence index x. Each sub-carrier mask activates or deactivates some of the sub-carriers, after which a differentially coded sequence is loaded on pairs of the adjacent active sub-carriers. The user equipment (UE) recognizes the mask with index g via power detection of the received frequency domain signal. Then it estimates the index x from differential demodulation followed by detection of the frequency domain sequence. In order to improve the performance, a method of jointly estimating g and x is devised. Simulation results showed that the proposed scheme is able to support a very large number of cell IDs while maintaining a good performance even in bad multi-cell environment.
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