| abstract |
An apparatus is disclosed, comprising means for providing two or more amplifiers (122, 124) for amplifying signals in two or more respective frequency bands, receiving a composite signal comprising first and second predistorted input signals in first and second frequency bands and filtering the composite signal to provide the first predistorted signal for input to a first amplifier (122) of the two or more amplifiers (122, 124) for producing an amplified first output signal and the second predistorted signal for input to a second amplifier (124) of the two or more amplifiers (122, 124) for producing an amplified second output signal. The apparatus may also comprise means for routing (146), at non-overlapping times, the first and second output signals to a common feedback path and for linearizing received first and second input signals based on the respective first and second output signals received on the common feedback path. |