Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2008-09-02
2008-09-02
Ghayour, Mohammad (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S350000, C375S360000, C375S232000, C370S509000, C370S511000, C370S514000
Reexamination Certificate
active
10326481
ABSTRACT:
A method for receiving at a receiver having a variable filter a transmitted signal that includes a periodic training signal. The method includes (a) receiving and sampling the transmitted signal at the receiver to produce a digital complex baseband signal; (b) filtering the digital complex baseband signal with the variable filter; (c) detecting the periodic training signal in the filtered digital complex baseband signal; (d) determining a desired channel impulse response based on the detected periodic training signal; (e) calculating filter coefficients required by the variable filter to achieve the desired channel impulse response; and (f) adjusting the variable filter according to the calculated filter coefficients. A receiver for implementing the method is also provided.
REFERENCES:
patent: 4418350 (1983-11-01), Rosen
patent: 4674103 (1987-06-01), Chevillat et al.
patent: 5732113 (1998-03-01), Schmidl et al.
patent: 6628724 (2003-09-01), Bannasch et al.
patent: 6834079 (2004-12-01), Strait et al.
patent: 6930989 (2005-08-01), Jones IV et al.
patent: 7027464 (2006-04-01), Nakahara et al.
patent: 2002/0110199 (2002-08-01), Happonen et al.
patent: 2002/0126618 (2002-09-01), Kim
patent: 2003/0043887 (2003-03-01), Hudson
patent: 2006/0104195 (2006-05-01), Nakahara et al.
Jacky S. Chow, John M. Cioffi, and John A.C. Bingham, “Equalizer Training Algorithms For Multicarrier Modulation Systems”, IEEE, 1993, pp. 761-765.
Peter J.W. Melsa, Richard C. Younce, and Charles E. Rohrs, “Impulse Response Shortening For Discrete Multitone Transceivers”, IEEE, Dec. 1996, pp. 1662-1672, vol. 44, No. 12.
Debajyotipal, Garud N. Iyengar, and J.M. Cioffi, “A New Method Of Channel Shortening With Applications To Discrete Multi Tone (DMT) Systems”, IEEE, 1998, pp. 763-768.
Korobkov Dmitri
Yasotharan Ambighairajah
Ghayour Mohammad
Hodgson & Russ LLP
Malek Leila
Unique Broadband Systems, Inc.
LandOfFree
Impulse response shortening and symbol synchronization in... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Impulse response shortening and symbol synchronization in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impulse response shortening and symbol synchronization in... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3916614