APPARATUS AND METHODS FOR TRANSMIT POWER CONTROL IN WIRELESS COMMUNICATION SYSTEMS

摘要

Apparatus and methods for transmit power control in wireless communication systems are provided. In one aspect, a wireless communication system includes a transmit chain that generates a transmit signal based on a data signal having a time-varying signal envelope, a power amplifier that amplifies the transmit signal, and a transmit chain controller that generates a first power control signal and a second power control signal that control an adjustable power level of the transmit chain. The transmit chain controller includes an error extractor that generates an error signal based on comparing an output signal power of the power amplifier to the time-varying signal envelope. The transmit chain controller further includes a control signal generator that generates the first power control signal and an adjustment signal based on estimating the error signal, and that generates the second power control signal based on the error signal and the adjustment signal.

主权项

1. A wireless communication system comprising:
a transmit chain configured to generate a transmit signal based on a data signal having a time-varying signal envelope, the transmit chain having an adjustable power level controlled by a plurality of power control signals including a first power control signal and a second power control signal; a power amplifier including an input configured to receive the transmit signal and an output configured to provide an amplified signal; and a transmit chain controller including an error extractor configured to generate an error signal based on comparing a power signal indicating a signal power at the output of the power amplifier to an envelope signal indicating the time-varying signal envelope of the data signal, and a control signal generator configured to generate the first power control signal and an adjustment signal based on estimating the error signal, and to generate the second power control signal based on the error signal and the adjustment signal.