Patent ID: 7983632

Claim:
A communication system comprising: a first modulator configured to receive I and Q signals and configured to generate an amplitude and phase modulate signal from the received I and Q signals; circuitry configured to receive the amplitude and phase modulated signal from the first modulator and configured to provide a modulated input signal that comprises the amplitude and phase modulated signal with amplitude modulation removed, wherein the circuitry is communicatively disposed between the first modulator and a phase detector of a translational loop; the translational loop coupled to receive the modulated input signal from the circuitry, the translational loop configured to generate a phase modulated signal in accordance with the modulated input signal and a phase feedback signal derived from the phase modulated signal, the phase modulated signal not including the amplitude modulation; an amplitude modulator coupled to receive the phase modulated signal, configured to amplitude modulate the phased modulated signal and configured to generate an amplitude modulated output signal in accordance with an amplitude control signal, the amplitude modulator comprising a mixer, the mixer comprising commutating switches and transconductor devices, wherein the mixer is tuned to an RF frequency of the amplitude modulated output signal to attenuate harmonics related to a mixing operation of the mixer; and an amplitude modulation control loop configured to generate the amplitude control signal in accordance with the amplitude modulated output signal and the amplitude and phase modulated signal from the first modulator, wherein the translational loop, the amplitude modulator, and the amplitude modulation control loop are part of a polar wireless communication architecture, wherein the translational loop is configured to receive the phase modulated signal before the phase modulated signal has been amplitude modulated by the amplitude modulator, wherein the amplitude modulation control loop is configured to receive the amplitude modulated output signal that has been amplitude modulated by the amplitude modulator, wherein the phase modulated signal is provided to the commutating switches, and wherein the amplitude control signal is provided to the transconductor devices.