Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2005-11-29
2009-11-24
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S343000, C375S259000, C370S902000, C370S320000, C370S335000, C370S342000, C370S441000, C370S479000, C370S515000, C455S059000, C327S001000, C327S100000, C706S032000, C706S032000, C706S032000, C706S032000
Reexamination Certificate
active
07623582
ABSTRACT:
Disclosed is an apparatus and method for estimating a start point of a frame in a wireless communication system. The method includes the steps of receiving a frame and estimating the start of the frame by searching for an interval or point of time during or at which a correlation between preambles is at its maximum. At this time, to in order to estimate the start of the frame, a cyclic prefix is used. Thus, a correlation between a cyclic prefix and the last interval of a symbol, which is the same as the cyclic prefix, is calculated and an interval or point of time having the maximum correlation is estimated as the start point of the cyclic prefix. Therefore, the start point of the frame can be accurately estimated based on the start point of the cyclic prefix.
REFERENCES:
patent: 6137847 (2000-10-01), Stott et al.
patent: 6459745 (2002-10-01), Moose et al.
patent: 2005/0063298 (2005-03-01), Ling et al.
patent: 1 313 283 (2003-05-01), None
patent: 10-145324 (1998-05-01), None
patent: WO 00/77961 (2000-12-01), None
patent: WO 2004/036861 (2004-04-01), None
patent: WO 2004/049618 (2004-06-01), None
Keller T et al: “Orthogonal Frequency Division Multiplex Synchronisation Techniques for Wireless Local Area Networks”, Seventh IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, vol. 3, Oct. 15, 1996.
Zhongjun Wang et al: “Design and Implementation of Timing Acquisition in IEEE 802.11a Wireless LANS”, Proceedings of the 2003 Joint Conference of the Fourth International Conference on Information, Communications and Signal Processing, vol. 1, Dec. 15, 2003.
Kim In-Hyoung
Kim Tae-Gon
Park Yun-Sang
Song Bong-Gee
Liu Shuwang
Samsung Electronics Co,. Ltd
Tayong Helene
The Farrell Law Firm, LLP
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