Methods and systems for reducing AMPM and AMAM distortion are disclosed and may comprise selectively coupling and impedance matching one of a plurality of tunable antennas to a single programmable output stage comprising a single power amplifier on a chip in a transmitter. A recursive signal processing algorithm with low pass filtering function is used, which entirely takes place at the lower sample rate. The host computer further includes a central processor, a memory unit and an inputoutput interface.