Patent ID: 9559808
Date: 2017-01-31
CPC Classifications: H03F,H03G,H04L

Claim:
1. A wireless communication system comprising: a transmit chain that receives a digital in-phase signal and a digital quadrature-phase signal and that generates a transmit signal, the transmit chain having an adjustable power level controlled by one or more power control signals including a coarse power control signal and a fine power control signal that provides a finer power adjustment of the transmit chain relative to the coarse power control signal; a power amplifier that amplifies the transmit signal; and a transmit chain controller including a reference generator that combines the digital in-phase signal and the digital quadrature-phase signal and generates a reference signal corresponding to an instantaneous value of an envelope of the combined digital in-phase signal and digital quadrature-phase signal, the transmit chain controller further including an error extractor that generates an error signal based on the reference signal and an output power of the power amplifier, a control signal generator that generates the one or more power control signals based on the error signal, an error estimator that generates an estimate signal based on the error signal, and a logic element that generates the coarse power control signal and an adjustment signal based on the estimate signal.