Reconditioning equalizer filter for non-constant envelope signals

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.