  Simultaneous Wireless Information and Power Transfer (SWIPT) has attracted
significant attention in the communication community. The problem of waveform
design for SWIPT has however never been addressed so far. In this paper, a
novel SWIPT transceiver architecture is introduced relying on the superposition
of multisine and OFDM waveforms at the transmitter and a power-splitter
receiver equipped with an energy harvester and an information decoder capable
of cancelling the multisine waveforms. The SWIPT multisine/OFDM waveforms are
optimized so as to maximize the rate-energy region of the whole system. They
are adaptive to the channel state information and result from a posynomial
maximization problem that originates from the non-linearity of the energy
harvester. Numerical results illustrate the performance of the derived
waveforms and SWIPT architecture.
