Digital signal processing techniques to compensate for RF imperfections in advanced transmitter architectures

Evolution of wireless standards toward multi communication pipe radios such as cellular, connectivity and broadcast pipes leads to technical challenges. On the transmitter point of view, the main difficulty is achieving standards linearity constraint while maintaining high efficiency of the power amplifier. After a presentation of the state of the art in transmitter architectures including their limitations in relation with modulation schemes, we present how digital signal processing can be implemented to compensate for RF imperfections. We demonstrate that the strategy for developing new transmitter architecture has to be based on a total interaction between digital signal processing and pure radio concepts.