Apparatus and method for cancellation of partially...

Telecommunications – Receiver or analog modulated signal frequency converter – Modulation distortion or cross talk correction or elimination

Reexamination Certificate

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Details

C455S296000, C455S067110, C455S226100, C375S346000, C375S324000, C375S349000, C381S071100

Reexamination Certificate

active

07640000

ABSTRACT:
The present invention is related to a partially overlapped single-carrier crosstalk signal cancellation method and an apparatus using the same. For this purpose, the present invention provides a crosstalk canceller including a pre-processor for frequency down-shifting an input signal, a crosstalk signal cancellation module for canceling the crosstalk signal by dividing the input signal by an interpolation ratio, a post-processor for converting an output of the crosstalk signal cancellation modulation into a passband signal, and an error feedback processor for performing a decimation operation on a residual crosstalk signal and feeding backing the decimated residual crosstalk signal to the crosstalk signal cancellation module. In addition, the present invention provides a crosstalk signal cancellation method for performing interpolation and filtering operations by frequency down-shifting an input signal including a crosstalk signal to a baseband and decimating a residual crosstalk signal by frequency-shifting to an original signal frequency.

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Minho Cheong et al.; “Computationally Efficient Cancellation of Partially-overlapped Crosstalk in Digital Subscriber Lines”; IEEE GLOBECOM 2005 proceeding; St. Lousi, Missouri, USA; Nov. 28-Dec. 2, 2005.

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