Pulse or digital communications – Equalizers
Reexamination Certificate
2007-02-06
2007-02-06
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Equalizers
C375S232000
Reexamination Certificate
active
10842623
ABSTRACT:
A method and modem receiver for receiving serial data from a transmission link, for recovering data from the received data, and for synchronizing the receiver timing to that of the transmitter are disclosed. A receiver equalizer includes a filter and quantizer in the forward path and a feedback circuit connecting the quantizer output to the filter input. A measuring circuit is used to initialize the feedback circuit. The receiver filter, provided as a QMF wavelet filter bank, is implemented in one embodiment with a form of polyphase filtering followed by four M/2-point FFTs. The quantizer recovers data symbols and provides a quantization error feedback signal. The measuring circuit provides an approximation of phase and amplitude of isolated wavelets.
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Broadband Physics, Inc.
Fan Chieh M.
Perilla Jason M.
Weingarten Schurgin, Gagnebin & Lebovici LLP
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