Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2004-06-07
2011-11-22
Payne, David C. (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S263000, C375S324000, C375S340000, C370S348000
Reexamination Certificate
active
08064554
ABSTRACT:
Multi-carrier transmission is performed without inserting a repetitive signal into guard interval periods. A transmitter provides guard interval periods by using a null signal to save transmission power and prevent the deterioration of the SN ratio. Delayed waves at the head of each received symbol cause high-frequency waves to occur and carriers to interfere with one another. Accordingly, a receiver adds a component following each received symbol to a delayed-wave component at the head of the received symbol. As a result, the delayed-wave component at the head of the received symbol and the added component become continuous in wave form and subcarriers do not interfere with each other.
REFERENCES:
patent: 6031390 (2000-02-01), Fant et al.
patent: 6826240 (2004-11-01), Thomas et al.
patent: 2003/0165131 (2003-09-01), Liang et al.
patent: 2004/0013084 (2004-01-01), Thomas et al.
patent: 2004/0110510 (2004-06-01), Jeon et al.
patent: 2004/0136314 (2004-07-01), Jung et al.
patent: 2004/0141548 (2004-07-01), Shattil
patent: 2004/0190560 (2004-09-01), Maltsev et al.
patent: 2004/0240527 (2004-12-01), Giannakis et al.
patent: 2007/0253496 (2007-11-01), Giannakis et al.
patent: 11-145930 (1999-05-01), None
patent: 2000-22657 (2000-01-01), None
patent: 2000-59332 (2000-02-01), None
patent: 2000-134176 (2000-05-01), None
patent: 2001-69110 (2001-03-01), None
patent: 2003-92559 (2003-03-01), None
patent: 2003-110520 (2003-04-01), None
Wang, Zhengdao et al., “Wireless Multicarrier Communications Where Fourier Meets Shannon”, IEEE Signal Processing Magazine, vol. 17, No. 3, pp. 29 to 48, 2000.
Scaglione, Anna et al., “Robust OFDM Transmissions Over Frequency-Selective Channels With Multiplicative Time-Selective Effects”, Acoustics, Speech, and Signal Processing, vol. 5, pp. 2677 to 2680, 2000.
Barbarossa, Sergio et al., “Performance Analysis of a Deterministic Channel Estimator for Block Transmission Systems with Null Guard Intervals”, IEEE Transaction on Signal Processing, vol. 50, No. 3, pp. 684 to 695, 2002.
Muquet, Bertrand et al. “Cyclic Prefixing or Zero Padding for Wireless Multicarrier Transmission?”, IEEE Transaction on Communications, vol. 50, No. 12, pp. 2136 to 2148, 2002.
Fujita Chihiro
Suzuki Mitsuhiro
Usui Takashi
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Payne David C.
Perez James M
Sony Corporation
LandOfFree
Radio communication system performing multi-carrier... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radio communication system performing multi-carrier..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio communication system performing multi-carrier... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4281213