Linear distortion and interference estimation using decision feedback equalizer coefficients

摘要

Linear distortion and interference estimation using decision feedback equalizer coefficients. Processing of different respective groups of equalizer coefficients may be made to determine the residual frequency response of an equalizer and/or device in which the equalizer is implemented. Such an equalizer may be implemented within any of a number of respective communication devices including those operative within satellite, wireless, wired, fiber-optic, and/or mobile communication systems. A first group of equalizer coefficients corresponds to certain filtering characteristics of the equalizer and/or device in which the equalizer is implemented. The equalizer is implemented to process a signal to generate a second group of equalizer coefficients. Processing and/or analysis of the first group of equalizer coefficients and the second group of equalizer coefficients will generate a third group of equalizer coefficients corresponding to the residual frequency response of the equalizer and/or device in which the equalizer is implemented.

主权项

1. An apparatus comprising:
a memory configured to store a first plurality of equalizer coefficients corresponding to filtering characteristics of the apparatus; an input configured to receive a signal from a communication channel; an equalizer, including a feed forward equalizer (FFE) and a decision feedback equalizer (DFE), configured to process the signal and to generate a second plurality of equalizer coefficients, including at least one equalizer coefficient corresponding to the FFE and at least one equalizer coefficient corresponding to the DFE, based on the signal; and a processing circuit configured to:
process the first plurality of equalizer coefficients and the second plurality of equalizer coefficients to generate a third plurality of equalizer coefficients corresponding to a residual frequency response of the equalizer; andprocess the residual frequency response of the equalizer to generate a frequency response of the communication channel.