Coding Efficiency of RF Pulse-Width-Modulation for Mobile Communications

The paper discusses the RF-PWM for mobile communication applications focusing on maximal achievable coding efficiency. Coding efficiency is one of the most crucial parameters for modulation concepts for switch mode amplification. It is shown that the achievable efficiency is mostly dependent on the chosen modulator waveform and the magnitude probability density function of the wanted signal. The paper determines the theoretical limits and unveils surprising benefits of unipolar waveforms. At the end the results are applied to realistic communication test signals with various system parameter sets.