Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2008-02-15
2009-11-10
Torres, Juan A (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S149000, C375S354000, C375S130000, C375S355000
Reexamination Certificate
active
07616719
ABSTRACT:
Improved performance, particularly gain in signal-to-noise ratio (SNR), in high-bandwidth Orthogonal Frequency Division Multiplexing (OFDM) receivers, software and systems is achieved by compensating channel estimates not only for carrier frequency offset and phase noise, but also for interference caused by sample phase jitter. At high bandwidths, e.g., using 256 quadrature amplitude modulation (QAM) symbol constellation, significant SNR improvement is gained by determining and applying a corresponding compensation to each data sub-carrier channel, the compensation preferably including a term that increases linearly with the sub-carrier index.
REFERENCES:
patent: 5345440 (1994-09-01), Gledhill et al.
patent: 5450456 (1995-09-01), Mueller
patent: 5608764 (1997-03-01), Sugita et al.
patent: 5640431 (1997-06-01), Bruckert et al.
patent: 5732113 (1998-03-01), Schmidl et al.
patent: 5732339 (1998-03-01), Auvray et al.
patent: 5838734 (1998-11-01), Wright
patent: 5889759 (1999-03-01), McGibney
patent: 6035003 (2000-03-01), Park et al.
patent: 6198782 (2001-03-01), De Courville et al.
patent: 6658063 (2003-12-01), Mizoguchi et al.
patent: 2001/0031022 (2001-10-01), Petrus et al.
patent: 2002/0065047 (2002-05-01), Moose
patent: 2002/0085651 (2002-07-01), Gu
patent: 2002/0101840 (2002-08-01), Davidsson et al.
patent: 1 160 981 (2001-05-01), None
Hyoung-Kyu Song, “Frequency-offset synchronization and channel estimation for OFDM-based transmission”, Communications Letters, IEEE, vol. 4, Issue 3, Mar. 2000 pp. 95-97.
Fernandez-Getino Garcia, “Tracking of time-frequency misalignments in 2D-pilot-symbol-aided coherent OFDM systems”, IEEE VTS-Fall VTC 2000, 52nd Vehicular Technology Conference, 2000. vol. 4, Sep. 24-28, 2000 pp. 1704-1709 vol. 4.
Simoens, “A New Method for Joint Cancellation of Clock and Carrier Frequency Offsets in OFDM Receivers Over Frequency Selective Channels”, IEEE 51stVehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 vol. 1, 15-18; May 2000; pp. 390-394 vol. 1.
In ho Hwang, “Frequency and Timing Period Offset Estimation Technique for OFDM Systems”, Electronics Letters, vol. 34, Issue 6, Mar. 19, 1998; pp. 520-521.
Thierry Pollet and Marc Moeneclaey, “Syncronizability of OFDM Signals,” Communication Engineering Lab, University of Ghent, St. Pietersnieuwstraat 41, B-9000 Ghent, Belgium, IEEE 1995.
IEEE Std. 802.11a-1999, Sep. 16, 1999; Sponsor LAN MAN Standards Committee of IEEE Computer Society, “Part 11: Wireless LAN Medium Access Contorl (MAC) and Physical Layer (PHY)Specifications, High-Speed Physical Layer in the 5 GHz Band”.
IEEE std. 802.11b-1999, Sep. 16, 1999; Sponsor LAN MAN Standards Committee of IEEE Computer Society, “Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layers (PHY) Specifications, Higher-Speed Physical Layer Extension in 2.4 GHz Band,” Ch. 18 (pp. 11-58).
ANSI/IEEE Std. 802.11-1999 Edition, Aug. 20, 1999; Sponsor LAN MAN Standards Committee of IEEE Computer Society, “Part 11: Wireless LAN Medium Access Contorl (MAC) and Physical Layer (PHY) Specifications,” Ch. 12 (pp. 138-146), Ch.13 (pp. 147), Ch. 15 (pp. 195-223).
ANSI/IEEE Std. 802.11g/D2.8, May 2002, Draft 2002 Edition, Sponsor LAN MAN Standards Committee of IEEE Computer Society, “Further Higher-Speed Physical Layer Extension in the 2.4 GHz Band.”
Abramowitz, “Handbook of Mathematical Functins”, 1972, Dover, p. 69.
Eli Maor, “e The Story of a Number”, 1994, Princeton University Press, p. 172.
Marvell International Ltd.
Torres Juan A
LandOfFree
Compensation for residual frequency offset, phase noise and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compensation for residual frequency offset, phase noise and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensation for residual frequency offset, phase noise and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4082692