Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2011-07-05
2011-07-05
Odom, Curtis B (Department: 2611)
Pulse or digital communications
Equalizers
Automatic
C375S143000, C375S152000, C375S341000, C375S346000, C375S350000
Reexamination Certificate
active
07974335
ABSTRACT:
A decision feedback equalization apparatus includes a channel estimation unit estimating a channel on received signal based on the received signal and a training sequence; a channel matched filter maximizing SNR from the channel estimated by the channel estimation unit changing channel characteristics of the received signal; a noncausal filter approximating the changed channel; an equalizer input signal storage unit storing received symbols passed through the channel matched and the noncausal filters; a channel equalization unit performing a decision feedback equalization; a Trellis decoder detecting symbol from a channel-equalized signal; a mode selection unit selecting a specific mode; an error signal calculator comparing an output signal of the selected mode with an output signal of the channel equalization unit to calculate an error signal; and a tap coefficient updater updating tap coefficients to the channel equalization unit, an output signal from the storage unit, and an output signal from the Trellis decoder.
REFERENCES:
patent: 4833693 (1989-05-01), Eyuboglu
patent: 4914699 (1990-04-01), Dunn et al.
patent: 5453797 (1995-09-01), Nicolas et al.
patent: 5533063 (1996-07-01), Mitra et al.
patent: 2004/0091039 (2004-05-01), Xia et al.
patent: 2005/0129143 (2005-06-01), Kang et al.
patent: 1020040022788 (2004-03-01), None
patent: 1020040025516 (2004-03-01), None
patent: 1020050001888 (2005-01-01), None
patent: 1020050049304 (2005-05-01), None
patent: 1020050054306 (2005-06-01), None
patent: 2005/050987 (2005-06-01), None
R.Citta, et al; “A VSB DTV Receiver Designed for Indoor and Distributed Transmission Environment”, Proceedings of the IEEE 52ndAnnual Broadcast Symposium, pp. 1-11, Oct. 2002.
Guozhu Long, et al; “The LMS Algorithm with Delayed Coefficient Adaptation”, IEEE Transaction on Acoustics, Speech and Signal Processing, vol. 37, No. 9, pp. 1397-1405, Oct. 1989.
M. Vedat Eyubo{hacek over (g)}lu; “Detection of Coded Modulation Signals on Linear, Severely Distorted Channels Using Decision-Feedback Noise Prediction with Interleaving”, IEEE Transaction on Communication, vol. 36, No. 4, pp. 401-409, Apr. 1998.
Hyoung-Nam Kim, et al; “Performance improvement of channel equalization in terrestrial DTV receivers using channel estimation”, Signal Processing Symposium, vol. 16, No. 1, pp. 1-4, Sep. 2003.
Kim Hyoung-Nam
Kim Seung-Won
Lee Soo-In
Lee You-Seok
Park Sung-Ik
Electronics and Telecommunications Research Institute
Ladas & Parry LLP
Odom Curtis B
LandOfFree
Apparatus for equalizing decision feedback based on channel... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for equalizing decision feedback based on channel..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for equalizing decision feedback based on channel... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2629403