Closed loop power control for a wireless transmitter

摘要

Embodiments of the present disclosure provide systems and methods for estimating gain and phase error in a wireless transmitter. Embodiments of the present disclosure provide a gain and phase controller that uses a digital gain and phase estimator to jointly estimate both gain and phase. The forward and feedback signals of a wireless transmitter are digitized using analog to digital (ADC) converters. The digital signals are correlated with each other to dynamically extract gain and phase estimates of the loop. The gain and phase estimates are used to correct gain and phase errors in the wireless transmitter.

主权项

1. A wireless transmitter comprising:
an output port; a feedback mechanism coupled to the output port, wherein the feedback mechanism is configured to generate a feedback signal; and a controller configured to:
receive a forward sample of a forward signal transmitted to the output port, andreceive a feedback sample of the feedback signal from the feedback mechanism,wherein the controller comprises an estimator, and wherein the estimator comprises:
a correlation module configured to correlate the forward sample and the feedback sample, andan impairment computation module coupled to an output of the correlation module, wherein the impairment computation module is configured to:
compute an estimated gain error representing a difference in gain between the forward signal and the feedback signal, andcompute an estimated phase error representing a difference in phase between the forward signal and the feedback signal.