by the post amp processing circuitry 10 is corrected via pre distortion within a linear equalizer 114 located upstream of the volterra filter 12 a determination function block 116 for the volterra filter 112 is connected to an input 118 of the volterra filter 112 and is connected to an output 120 of the power amplifier 102 a determination function block 122 for the linear equalizer 114 is operatively connected to the input 124 of the linear equalizer and the output 126 of the post amp processing circuitry 106 compared to the system 10 shown in fig1 the system 100 of fig5 includes one less u201c step u201d of compensation i e sampling adaptation determination and pre distortion specifically the functions of compensation performed by the non linear corrector 24 fig1 and the second linear equalizer 26 of the system 10 of fig1 are performed by the volterra filter 112 fig5 of the system 100 the use of the linear equalizer 114 upstream of the volterra filter 112 has certain benefits especially if the post amp processing circuitry 106 includes a high power filter the high power filter may be a relatively high order filter as such it requires a significant order of volterra filter to compensate for it in general the order of a volterra type filter will increase as the square of the system order whereas a linear equalizer is typically about the same order as the system for which.