  This paper proposes a chaotic waveform-based multi-antenna receiver design
for simultaneous wireless information and power transfer (SWIPT). Particularly,
we present a differential chaos shift keying (DCSK)-based SWIPT multiantenna
receiver architecture, where each antenna switches between information transfer
(IT) and energy harvesting (EH) modes depending on the receiver's requirements.
We take into account a generalized frequency-selective Nakagami-m fading model
as well as the nonlinearities of the EH process to derive closed-form
analytical expressions for the associated bit error rate (BER) and the
harvested direct current (DC), respectively. We show that, both depend on the
parameters of the transmitted waveform and the number of receiver antennas
being utilized in the IT and EH mode. We investigate a trade-off in terms of
the BER and energy transfer by introducing a novel achievable `success rate -
harvested energy' region. Moreover, we demonstrate that energy and information
transfer are two conflicting tasks and hence, a single waveform cannot be
simultaneously optimal for both IT and EH. Accordingly, we propose appropriate
transmit waveform designs based on the application specific requirements of
acceptable BER or harvested DC or both. Numerical results demonstrate the
importance of chaotic waveform-based signal design and its impact on the
proposed receiver architecture.
