WLC32-6: A Cell Search Technique based on Known Postfix for OFDM Cellular Systems

Author

Jeon, Younghyun ; Kwun, Jonghyung ; Lee, Sanghoon

Author_Institution

Telecommun. R&D Center, Samsung Electron. Co., Ltd., Suwon

fYear

2006

fDate

Nov. 27 2006-Dec. 1 2006

Firstpage

1

Lastpage

5

Abstract

A cell search technique utilizing a known postfix for OFDM (orthogonal frequency division multiplexing) cellular systems is described. The known postfix is generated in the time domain by inserting pilots in the frequency domain and plays the role of the cyclic prefix in general OFDM systems. Since it demonstrates good correlation properties, it can be facilitated to synchronize each symbol with an identified postfix. In this paper, two different known postfixes are allocated to each cell. One is used for cell identification and symbol synchronization, which is designed to be different among neighboring cells. The other is used for frame synchronization and is the same for all cells. In the simulation, the cell search is accomplished with a probability greater than 10^-3 at -27 dB in a vehicular channel. Even at -30 dB, the cell search probability is greater than 10^-2 in a pedestrian channel as well as 10^-3 in the AWGN (additive white Gaussian noise) channel.

Keywords

AWGN channels; OFDM modulation; cellular radio; probability; search problems; synchronisation; wireless channels; AWGN channel; OFDM cellular systems; additive white Gaussian noise channel; cell identification; cell search probability; cyclic prefix; frame synchronization; frequency domain analysis; known postfix generation; orthogonal frequency division multiplexing; pedestrian channel; symbol synchronization; time domain analysis; vehicular channel; AWGN; Bandwidth; Channel estimation; Electronic mail; Frequency domain analysis; Frequency estimation; Frequency synchronization; OFDM; Robustness; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2006. GLOBECOM '06. IEEE

Conference_Location

San Francisco, CA

ISSN

1930-529X

Print_ISBN

1-4244-0356-1

Electronic_ISBN

1930-529X

Type

conf

DOI

10.1109/GLOCOM.2006.804

Filename

4151434