Method and means for increasing inherent channel capacity for wired network

• US 7,460,661 B2
• Filed: 03/05/2004
• Issued: 12/02/2008
• Est. Priority Date: 09/20/1999
• Status: Expired due to Fees

• Current Assignee: Apex/Eclipse Systems, Inc.
• Original Assignee: Apex/Eclipse Systems, Inc.
• Inventors: Smith, Harry B.
• Primary Examiner(s): Jamal; Alexander
• Application Number:
  US10/793,251
• Publication Number:
  US 20040240662A1
• Time in Patent Office: 1,733 Days
• Field of Search: 379/392.01
• US Class Current: 379/392.01
• CPC Class Codes: H03M 1/207 using a digital interpolation circuit

Abstract

A receive system providing enhanced Signal to Noise performance is applicable to a wide variety of applications including both wireless and wireline systems which further include internet type communications. Received signals are converted to digital values and stored in a manner which enables subsequent processing directed to improving the resolution of the received signals and to reduce the associated noise corresponding to the received data samples. The Signal-to-Noise ratio of the received data signals is improved as a result of processing techniques made possible by the digitally stored nature of the received data and a unique iterative data processing method.

Claims

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.

2. An integrated circuit chip as claimed in claim 1 that executes a logic flow guided by means of a decision tree and thus, in an orderly fashion, reduces several possible consequences to a single choice of one value for a subsequent iterative probe, such choice consisting of an appropriate magnitude and polarity.

3. An integrated circuit device or group of devices as claimed in claim 1, wherein computed deviations form array values, which are signal level independent, are applied to one row of the matrix in a form of a plus or minus column shift results in the matrix being in equilibrium about the topocentric of the array and the matrix is operable to serve as a change detector to sense progressive changes as caused by a series of iterative probes.

4. A method for increasing the signal to noise ratio of a receive wireline system, said method comprising the steps of:

receiving receive signals from a wire-line;

amplifying said receive signals to form amplified signal-plus-noise signals;

creating in-phase and quadrature digital versions of said received signals wherein said in-phase and quadrature versions are about ninety degrees out of phase with respect to each other;

storing said signal-plus-noise signals in a memory device;

forming at least one matrix digitally representing a plurality of values, said values consisting of said in-phase and quadrature versions of said receive signals;

performing an iterative process on data contained in said matrix to determine an estimate of the magnitude and polarity of the noise portion of the signal-plus-noise for each trial;

subtracting each estimated noise value from the stored signal-plus-noise version to obtain a noise-reduced signal; and

using a topographic digital number array, that covers a positive and negative range and is in equilibrium about a topocentric value, 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;

in which computed deviations form array values, which are signal level independent, are applied to one row of said matrix in the form of a plus or minus column shift results in the matrix being in equilibrium about the topocentric of the array and thereby enduring the matrix with the ability to serve as a change detector to sense progressive changes as caused by a series of iterative probes.