Multiplex communications – Duplex – Transmit/receive interaction control
Reexamination Certificate
2011-01-04
2011-01-04
Phan, Tri H (Department: 2471)
Multiplex communications
Duplex
Transmit/receive interaction control
C370S293000, C375S346000, C379S406010
Reexamination Certificate
active
07864718
ABSTRACT:
An apparatus for echo cancellation in a transceiver of a full duplex communication system, where the transceiver includes a transmitter for transmitting a transmit signal and a receiver for receiving a receive signal, includes: an echo cancellation signal generator, coupled to the transmitter, for receiving the transmit signal and for generating an echo cancellation signal according to the transmit signal, wherein the echo cancellation signal reflects an effect of an impedance of a channel and a parasitic capacitor of the transceiver; and a calculation module coupled to the transmitter, the receiver, and the echo cancellation signal generator for receiving the receive signal and for canceling the echo of the receive signal according to the echo cancellation signal to generate an echo-cancelled signal, wherein the effect of the impedance of the channel and the parasitic capacitor of the transceiver in the echo-cancelled signal is reduced.
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CA3130,CA3130A, Sep. 1998.
Huang Chen-Chih
Huang Chih-Wen
Hsu Winston
Margo Scott
Phan Tri H
REALTEK Semiconductor Corp.
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