TECHNIQUES FOR LINEARIZING PHASE SEPARATELY FROM AMPLITUDE IN A COMMUNICATIONS SYSTEM

摘要

The present disclosure, for example, relates to one or more techniques for linearizing a signal in a communications system. An input signal may be obtained at a beginning of a signal path of a radio frequency (RF) communication device. The RF communication device may estimate subsequent distortion of the input signal due to the signal path. The estimated distortion may include estimated phase distortion and estimated amplitude distortion of the input signal. The RF communication device may adjust phase and amplitude within the signal path to compensate for the estimated phase distortion and the estimated amplitude distortion to produce an adjusted signal. The phase within the signal path of the input signal may be adjusted separately from the amplitude within the signal path of the input signal. The RF communication device may generate a linearized signal at an end of the signal path based at least in part on the adjusted signal.

主权项

1. A method comprising:
obtaining an input signal at a beginning of a signal path of a radio frequency (RF) communication device; estimating subsequent distortion of the input signal due to the signal path, the estimated distortion comprising estimated phase distortion and estimated amplitude distortion of the input signal; adjusting phase and amplitude within the signal path to compensate for the estimated phase distortion and the estimated amplitude distortion to produce an adjusted signal, wherein the phase is adjusted separately from the amplitude, wherein the adjusting the phase and amplitude of the input signal comprises:
adjusting the phase of the input signal with a phase modification circuit of the RF communication device, wherein the adjusting the phase of the input signal with the phase modification circuit comprises:
modifying a phase of a signal in a local oscillator (LO) chain of the RF communication device based on the estimated phase distortion; andapplying the modified LO signal to the input signal; andadjusting the amplitude of the input signal with an amplitude modification circuit of the RF communication device, wherein the amplitude modification circuit is separate from the phase modification circuit; and generating a linearized signal at an end of the signal path based at least in part on the adjusted signal.