Integrated SWIPT Receiver with Memory Effects: Circuit Analysis and Information Detection
arxiv(2024)
Abstract
Wireless power transfer has been proposed as a key technology for the
foreseen machine type networks. A main challenge in the research community lies
in acquiring a simple yet accurate model to capture the energy harvesting
performance. In this work, we focus on a half-wave rectifier and based on
circuit analysis we provide the actual output of the circuit which accounts for
the memory introduced by the capacitor. The provided expressions are also
validated through circuit simulations on ADS. Then, the half-wave rectifier is
used as an integrated simultaneous wireless information and power transfer
receiver where the circuit's output is used for decoding information based on
amplitude modulation. We investigate the bit error rate performance based on
two detection schemes: (i) symbol-by-symbol maximum likelihood (ML); and (ii)
ML sequence detection (MLSD). We show that the symbol period is critical due to
the intersymbol interference induced by circuit. Our results reveal that MLSD
is necessary towards improving the error probability and achieving higher data
rates.
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