Patent ID: 8542768

Claim:
A dual channel remote radio head unit for wireless communications comprising: at least two power amplifiers, each receiving an input signal centered on a separate frequency and each providing as an output an amplified representation of the received input signal; at least two feedback sensors, at least one associated with each power amplifier for providing a feedback signal that includes a representation of to the noise characteristics of the associated power amplifier; digital logic for processing signals; a feedback switch, controlled by the digital logic, for selecting one of the feedback signals for connection to the digital logic to enable the digital logic to generate predistortion compensation signals appropriate for each of the power amplifiers based at least in part on the feedback signals; at least two temperature sensors, at least one associated with each power amplifier for providing a temperature signal that represents the temperature of the associated power amplifier; and a temperature switch, controlled by the digital logic, for selecting one of the temperature signals for connection to the digital logic to enable the digital logic to generate predistortion compensation signals appropriate for each of the power amplifiers based at least in part on the temperature signals.