Patent ID: 8787438

Claim:
A reconditioning equalizer method for use with non-constant envelope signals to enhance the performance of a transmitter, the reconditioning equalizer method comprising: delay-and-gain adjusting a main input baseband signal to produce a primary delay-and-gain-adjusted main baseband signal; peak-reduction filtering the main input baseband signal to produce a peak-reduced main baseband signal; injecting an in-band-and-out-of-band-adjusted baseband signal into the main baseband signal in a feedforward loop, wherein the injecting comprises: delaying the main baseband signal, gain-adjusting the delayed main baseband signal to produce a second delay-and-gain-adjusted main baseband signal, subtracting the second delay-and-gain-adjusted main baseband signal from the peak-reduced main baseband signal, correlating the main baseband signal and the result of the subtraction of the second delay-and-gain-adjusted main baseband signal from the peak-reduced main baseband signal to calculate the amount of delay adjustment in the delaying and the amount of gain adjustment in the gain-adjusting, low-pass filtering the result of the subtraction of the second delay-and gain-adjusted main baseband signal from the peak-reduced main baseband signal to adjust in-band and out-of-band components in the baseband signal, adjusting the gain of the filtered subtraction of the second delay-and-gain-adjusted main baseband signal from the peak-reduced main baseband signal for injection into the primary delay-and-gain-adjusted main baseband signal, and summing the primary delay-and-gain-adjusted main baseband signal and the low-pass-filtered and gain-adjusted subtraction of the second delay-and-gain-adjusted main baseband signal from the peak-reduced main baseband signal to produce a modified main baseband signal; adjusting the gain of the modified main baseband signal to produce an output; and using the main baseband signal, the output of the low pass filter, the output of the reconditioning equalizer filter, and external input to control the peak-reduction filtering, the correlating, the delay-and-gain adjusting, and the adjusting the gain of the filtered subtraction.