METHOD FOR CONSTRUCTING FRAME PREAMBLE IN OFDM WIRELESS COMMUNICATION SYSTEM, AND METHOD FOR ACQUIRING FRAME SYNCHRONIZATION AND SEARCHING CELLS USING PREAMBLE

WIPO Patent Application WO2005062728

A3

Disclosed are a method for constructing a frame preamble in an OFDM wireless communication system, and a method for acquiring frame synchronization and searching cells using the preamble. The preamble is arranged at the beginning of a frame and constructed of a pattern repeated an integer number of times, and a CP. The pattern has a length shorter than a single OFDM symbol interval. The length of the repetitive pattern is not limited to an integer number of times a single OFDM symbol interval. Frame synchronization can be acquired by observing cross-correlation of a received signal and reference patterns and detecting the moment when the absolute value of the cross-correlation exceeds a predetermined threshold. Otherwise, frame synchronization can be acquired by observing auto-correlation of the received signal using repeated patterns included in the received signal and detecting the moment when the absolute value of the auto-correlation becomes the maximum value.

LIM HYOUNG-SOO (KR)
YEH CHOONG-IL (KR)
LEE YU-RO (KR)
KWON DONG-SEUNG (KR)
HWANG SEUNG-KU (KR)

PCT/KR2004/002730

August 31, 2006

October 27, 2004

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KOREA ELECTRONICS TELECOMM (KR)
SAMSUNG ELECTRONICS CO LTD (KR)
KT CORP (KR)
SK TELECOM CO LTD (KR)
KT FREETEL CO LTD (KR)
HANARO TELECOM INC (KR)
LIM HYOUNG-SOO (KR)
YEH CHOONG-IL (KR)
LEE YU-RO (KR)
KWON DONG-SEUNG (KR)
HWANG SEUNG-KU (KR)

H04J11/00

WO2000008908A2

2000-02-24

US20020075797A1

2002-06-20

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