System and method for linear distortion estimation by way of equalizer coefficients
AssigneeBroadcom Corporation
InventorsThomas Kolze, Bruce Currivan
Life of this patent
Estimating the term…
Abstract
Provided is a method and system for estimating distortion in a communications channel including an adaptive equalizer. The method includes determining one or more adaptive filter coefficients associated with a signal passed through the equalizer. The method also includes estimating un-equalized channel distortion based upon the determined adaptive filter coefficients.
Claims27
A method for estimating distortion in a communications system channel including an adaptive equalizer, comprising:
- determining one or more adaptive filter coefficients associated with a signal passed through the equalizer;
- and
- estimating un-equalized channel distortion based upon the determined adaptive filter coefficients.
A method for estimating noise in a communications channel including an adaptive equalizer, comprising:
- determining one or more adaptive filter coefficients h1(n) associated with a signal passed through the equalizer;
- normalizing the determined coefficients to unit energy;
- and
- differencing the normalized coefficients with an ideal response h0(n) of the communications channel, the differencing producing an error sequence h2(n).
A method for estimating noise in a communications channel including an adaptive equalizer, comprising:
- receiving data within the channel and converging taps of the equalizer when the data is received;
- determining a sum of tap power values, the sum excluding a power of a main tap and dividing the sum by a combined power of all the taps;
- normalizing the taps to unity power;
- determining a difference filter from the normalized taps;
- and
- summing a power of taps of the difference filter.
An apparatus for estimating distortion in a communications system channel including an adaptive equalizer, comprising:
- means for determining one or more adaptive filter coefficients associated with a signal passed through the equalizer;
- and
- means for estimating un-equalized channel distortion based upon the determined adaptive filter coefficients.
An apparatus for estimating noise in a communications channel including an adaptive equalizer, comprising:
- means for determining one or more adaptive filter coefficients h1(n) associated with a signal passed through the equalizer;
- means for normalizing the determined coefficients to unit energy;
- and
- means for differencing the normalized coefficients with an ideal response h0(n) of the communications channel, the differencing producing an error sequence h2(n).
A computer readable medium carrying one or more sequences of one or more instructions for execution by one or more processors to perform a method for estimating distortion in a communications system channel including an adaptive equalizer, the instructions when executed by the one or more processors, cause the one or more processors to perform the steps of:
- determining one or more adaptive filter coefficients associated with a signal passed through the equalizer;
- and
- estimating un-equalized channel distortion based upon the determined adaptive filter coefficients.
Dependencies are inferred from the claim text.