A method for real-time generation of slew-rate limited envelopes in envelope tracking transmitters

This paper shows a method for generating slew-rate limited envelopes in order to accomplish the slew-rate restrictions of the envelope driver in envelope tracking transmitters. The proposed algorithm can run in real-time and it is implemented in a digital front-end of a Software Radio system. Simulation results and conclusions are provided to validate the methodology. Moreover, experimental results of an FPGA implementation are also provided.