Abstract
A new concept of simultaneous wireless information and power transfer (SWIPT) is proposed, based on multiplexing a continuous-phase modulated (CPM) information transfer signal and a multitone power transfer (PT) signal. The tones of the PT signal have frequencies falling into low-power sub-bands and/or spectral null frequencies of the CPM signal. Therefore, the interference of the PT signal to the CPM signal is minimized and, simultaneously, the CPM and PT signals can be separated by the corresponding complementary filters in the receiver. Numerical evaluations show that the proposed PT signal design practically entails a negligible loss of CPM detection performance.
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