Signal Reception Using Non-Linearity-Compensated, Partial Response Feedback

Abstract

A receiver may receive a signal that was generated by passage of symbols through a non-linear circuit. An equalizer of the receiver may equalize the received signal based on a first non-linearity compensated, inter-symbol correlated (ISC) feedback signal to generate an equalized signal. The receiver may correct a phase error of the equalized signal to generate a phase-corrected equalized signal. The phase correction may be based on a second, non-linearity compensated, inter-symbol correlated (ISC) feedback signal.

1 - 20 . (canceled) 
     
     
         21 . A method comprising:
 in an electronic receiver:
 receiving a signal; 
 converting said received to a symbol-domain signal; 
 generating an estimate of symbols transmitted to generate said received signal; and 
 generating an error signal indicative of an error in said generated estimate of said symbols, wherein said generating said error signal comprises nonlinearly distorting said estimate of said symbols. 
   
     
     
         22 . The method of  claim 21 , comprising, as part of said converting said received signal to said symbol-domain signal, equalizing said received signal to generate an equalized signal. 
     
     
         23 . The method of  claim 21 , comprising, as part of said generating said error signal, calculating a Euclidean distance between a feedback signal and said equalized signal. 
     
     
         24 . The method of  claim 21 , comprising:
 generating a feedback signal from said symbol-domain signal; and   phase adjusting said equalized signal based on said feedback signal.   
     
     
         25 . The method of  claim 24 , comprising, as part of said generating said feedback signal, convolving said estimate of said symbols with a plurality of tap coefficients. 
     
     
         26 . The method of  claim 25 , comprising determining said tap coefficients based on tap coefficients of a filter of a transmitter from which said received signal was received. 
     
     
         27 . The method of  claim 21 , comprising, as part of said generating said error signal, processing said estimate of said symbols via a nonlinearity modeling circuit. 
     
     
         28 . The method of claim  278 , wherein said nonlinearity modeling circuit models a nonlinearity of a transmitter from which said received signal was received. 
     
     
         29 . The method of  claim 28 , wherein said nonlinearity modeling circuit models a nonlinearity of a front-end of said electronic receiver. 
     
     
         30 . A system comprising:
 circuitry for use in an electronic receiver, the circuitry comprising a nonlinearity modeling circuit and being operable to:
 receive a signal; 
 convert said received signal to a symbol-domain signal; 
 generate an estimate of symbols transmitted to generate said received signal; and 
 generate an error signal indicative of an error in said generated estimate of said symbols, wherein said generation of said error signal comprises nonlinearly distorting of said estimate of said symbols via said nonlinearity modeling circuit. 
   
     
     
         31 . The system of  claim 30 , wherein:
 said circuitry comprises an equalizer; and   said conversion of said received signal to said symbol-domain signal comprises equalization, via said equalizer, of said received signal to generate an equalized signal.   
     
     
         32 . The system of  claim 31 , wherein said generation of said error signal comprises calculation of a Euclidean distance between a feedback signal and said equalized signal. 
     
     
         33 . The system of  claim 31 , wherein said circuitry is operable to:
 generate a feedback signal from said symbol-domain signal; and   phase adjust said equalized signal based on said feedback signal.   
     
     
         34 . The system of  claim 31 , wherein said generation of said feedback signal comprises convolution of said estimate of said symbols signal with a plurality of tap coefficients. 
     
     
         35 . The system of  claim 31 , wherein said circuitry is operable to determine said tap coefficients based on tap coefficients of a filter of a transmitter from which said received signal was received. 
     
     
         36 . The system of  claim 31 , wherein said generation of said feedback signal comprises processing of said estimate of said symbols via said nonlinearity modeling circuit. 
     
     
         37 . The system of  claim 38 , wherein said nonlinearity modeling circuit models a nonlinearity of a transmitter from which said received partial-response-domain signal was received. 
     
     
         38 . The system of  claim 38 , wherein said nonlinearity modeling circuit models a nonlinearity of a front-end of said electronic receiver.