Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2003-06-30
2009-06-16
Corrielus, Jean B (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S286000, C379S406010, C379S003000, C370S201000, C370S290000
Reexamination Certificate
active
07548599
ABSTRACT:
A method and apparatus are disclosed for reducing cross-talk in an unbalanced channel with a reduced number of redundancies. A cross-talk canceller is disclosed that uses a multi-dimensional finite impulse response (FIR) filter to process a received signal. Redundancies are reduced or even removed entirely by processing the signals received on each twisted pair in a vector form, using multi-dimensional finite impulse response filters. The signals received by a transceiver on each twisted pair are represented in a vector form so that the signals received on each twisted pair, and the cross-talk effect that each signal has on one another, can be performed collectively. A multi-dimensional cross-talk canceller processes a vector representation of the corresponding signals transmitted by the transceiver on each twisted pair. An adder sums the equalized vector representation of the signals received by the transceiver and the processed vector representation of the signals transmitted by the transceiver to generate an estimate of the received signal on each twisted pair.
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Agere Systems Inc.
Corrielus Jean B
Ryan & Mason & Lewis, LLP
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