Pulse or digital communications – Equalizers
Reexamination Certificate
2008-07-29
2008-07-29
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Equalizers
C375S140000, C375S142000, C375S233000, C375S267000, C380S239000, C455S562100, C370S335000
Reexamination Certificate
active
07406120
ABSTRACT:
Channel impulse response estimation employs a training sequence to enable correction for multipath and other disturbances affecting a signal during transmission via a digital wireless communication channel. High-speed packet transmission rates, with a training sequence for each packet, are made possible by training sequence construction enabling fast algorithm processing of received signals for impulse response estimation. Upon reception, a Toeplitz-type mathematical representation is constructed based on transmitted and received versions of a training sequence. The Toeplitz-type representation may then be processed by application of fast algorithms, such as Levinson-type algorithms, to determine coefficients representative of the communication channel impulse response. These coefficients, applied to an adaptive equalizer type of filter, enable correction for signal disturbances incurred in transmission. Channel impulse response estimation methods and systems are described.
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Giardina Charles R.
Lomp Gary
Schmidt Barnet M.
BAE Systems Information and Electronic Systems Integration Inc.
Fan Chieh M.
Pathak Sudhanshu C.
Robinson Kenneth P.
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