Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2011-08-02
2011-08-02
Flores, Leon (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S260000, C375S267000, C375S299000, C375S340000, C375S347000, C375S144000, C375S148000, C370S203000, C370S204000, C370S206000, C370S208000, C370S210000, C370S480000
Reexamination Certificate
active
07991089
ABSTRACT:
An inter-carrier interface removal device can improve estimation accuracy of inter-carrier interference caused by Doppler shift in a received multi-carrier signal moving at a high speed, and a reception characteristic of the multi-carrier signal after removing the inter-carrier interference. The inter-carrier interference removal device includes a channel estimation unit estimating a channel frequency characteristic according to a carrier signal, an equalization unit equalizing the carrier signal with the channel frequency characteristic and outputs tentative carrier data, a reliability value calculation unit calculating a reliability value according to the channel frequency characteristic, a weighting unit weighting the tentative carrier data with the reliability value, an ICI component estimation unit estimating an ICI component according to the weighted tentative carrier data and the estimated channel frequency characteristic, and an ICI removal calculation unit removing the ICI component from the carrier signal.
REFERENCES:
patent: 7151808 (2006-12-01), Fujii et al.
patent: 7298785 (2007-11-01), Suzuki
patent: 7313189 (2007-12-01), Yoshida et al.
patent: 7362832 (2008-04-01), Yoshida
patent: 7526042 (2009-04-01), Yoshida
patent: 2002/0146063 (2002-10-01), Gorokhov et al.
patent: 2002/0181549 (2002-12-01), Linnartz et al.
patent: 2004/0229581 (2004-11-01), Mizoguchi et al.
patent: 2005/0180517 (2005-08-01), Abe
patent: 2006/0286948 (2006-12-01), Taniguchi et al.
patent: 2003-524338 (2003-08-01), None
patent: 2004-172699 (2004-06-01), None
patent: 2004-519900 (2004-07-01), None
patent: 2005-229466 (2005-08-01), None
patent: 2006-41980 (2006-02-01), None
International Search Report issued Jan. 9, 2007 in the International (PCT) Application of which the present application is the U.S. National Stage.
Schmidt et al., “Low Complexity Inter-Carrier Interference Compensation for Mobile Reception of DVB-T”,International OFDM-Workshop, pp. 72-76, 2004.
“Transmission System for Digital Terrestrial Television Broadcasting”, Association of Radio Industries and Businesses, ARIB STD-B31, pp. 8-9, 46-49, 52-53 (partial English translation).
“Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: High-speed Physical Layer in the 5GHZ Band”, IEEE, pp. 10-13 and 22-23, 1999.
Tomasin et al., “Achieving Mobility for DVB-T By Signal Processing for Doppler Compensation”,Proc. IBC Conference, pp. 412-420, 2002.
Matsumura Yoshinobu
Nakahara Hideki
Ouchi Mikihiro
Taniguchi Tomohiko
Flores Leon
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
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