Patent ID: 8837635
Filing Date: 2014-09-16
Classification: H03F,H03G

Abstract:
1. A method for controlling a transmit path, including a power amplifier (PA), of a wireless device, comprising: measuring forward signal components at an output of the PA, wherein the forward signal components result from applying an input signal to the transmit path of the wireless device; generating a feedback signal from the measured forward signal components using a feedback path of the wireless device, wherein generating the feedback signal includes generating amplitude and phase information from the measured forward signal components; estimating an error vector magnitude (EVM) using the input signal and the feedback signal; and controlling the transmit path based on the estimated EVM, wherein controlling the transmit path comprises controlling a supply voltage of the PA based on a comparison of the estimated EVM to a desired EVM, and wherein controlling the supply voltage comprises increasing the supply voltage of the PA when the estimated EVM is higher than the desired EVM.