adaptive feedforward amplifier

which class power amplifier best suits in order to design Ku band downlink transmitters?. is there any reference how to design a feedforward linearization architecture? for the moment there is a design for adaptive feedforward amplifier for UMTS downlink transmitters. i need to design for Ku band downlink transmitters. is there any reference to design feedforward linearization architecture? here i attach the journal regarding UMTS downlik transmitters. pls help

from where ,you download it .
good paper