Patent ID: 7460661
Filing Date: 2008-12-02
Classification: H03M

Abstract:
1. An integrated circuit device or group of devices comprising: a receive portion operable to receive signals from a wire-line; an amplifying portion operable to amplify the receive signals to form amplified signal-plus-noise signals; an I-Q portion operable to create in-phase and quadrature digital versions of said receive signals, wherein the in-phase and quadrature versions are about ninety degrees out of phase with respect to each other; a memory portion operable to store the signal-plus-noise signals; a matrix forming portion operable to form at least one matrix digitally representing a plurality of values, the values consisting of the in-phase and quadrature versions of the receive signals; an iterative processing portion operable to performing an iterative process on data contained in the matrix to determine an estimate of the magnitude and polarity of a noise portion of the signal-plus-noise for each of one or more trials; and an operation portion operable to subtract each estimated noise value from the stored signal-plus-noise version to obtain a noise-reduced signal, wherein a topographic digital number array, which covers a positive and negative range of numbers and is in equilibrium about a topocentric value, is used to detect when the polarity of the noise portion of a signal-to-noise combination changes from positive to negative or from negative to positive in response to an injection of a predetermined value probe.