Pulse or digital communications – Receivers – Particular pulse demodulator or detector
Reexamination Certificate
2004-07-20
2009-06-23
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Receivers
Particular pulse demodulator or detector
C375S344000, C375S345000, C375S348000, C375S355000
Reexamination Certificate
active
07551696
ABSTRACT:
A method for detecting inter-symbol interference (ISI) in an OFDM system includes the steps of computing a first correlation value representing the correlation between a plurality of first signals of a first symbol and a plurality of second signals of a second symbol previous to the first symbol, wherein the first and the second signals are both transmitted via the same sub-carriers; computing a second correlation value representing the correlation between the first signals and a plurality of third signals of a third symbol next to the first symbol, wherein the first and the third signals are both transmitted via the same sub-carriers; comparing the first correlation value with the second correlation value; and adjusting the timing of the boundary according to the comparison result.
REFERENCES:
patent: 6438183 (2002-08-01), Taura et al.
patent: 6438367 (2002-08-01), Crawford
patent: 6690739 (2004-02-01), Mui
patent: 6990156 (2006-01-01), Chen
patent: 7020116 (2006-03-01), Nakada
patent: 7042930 (2006-05-01), Dafesh
patent: 7136436 (2006-11-01), Gummadi et al.
patent: 7151792 (2006-12-01), Shimizu et al.
patent: 7218691 (2007-05-01), Narasimhan
patent: 7227834 (2007-06-01), Barton et al.
patent: 7257175 (2007-08-01), Chen et al.
patent: 7391828 (2008-06-01), Liu et al.
patent: 2002/0021771 (2002-02-01), Pozidis
patent: 2003/0090994 (2003-05-01), Kakura
patent: 2003/0179698 (2003-09-01), Lu
patent: 2005/0084025 (2005-04-01), Chen
patent: 2005/0135432 (2005-06-01), Kelley
patent: 2005/0152317 (2005-07-01), Awater et al.
patent: 2005/0276340 (2005-12-01), Chow
patent: 2007/0053281 (2007-03-01), Schwoerer
patent: 0225857 (2002-03-01), None
Konstantinos Nikitopoulos, Andreas Polydoros; “Post-FFT Fine Frame Synchronization for OFDM systems”;National and Capodistrian University of Athens, Dept. of Physics, Electronics Laboratory, 157 84 Panepistimiopolis, Athens, Greece.
Michael Speth, et al.;“Optimum Receiver Design for OFDM-Based Broadband Transmission-Part 2: A Case Study”;IEEE Transactions on Communications, vol. 49, No. 4, Apr. 2001.
Cho Chun-Ming
Yen Kuang-Yu
Hsu Winston
Liu Shuwang
Realtek Semiconductor Corp.
Singh Hirdepal
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