261 research outputs found
Experimental Wireless Communication Using Chaotic Baseband Waveform
This work was supported by NSFC under Grants 61401354, 61172070, and 61502385, in part by the Key Basic Research Fund of Shaanxi Province under Grant 2016ZDJC0067, in part by the Natural Science Basic Research Plan in Shaanxi Province of China under Grant 2016JQ6015, in part by the Scientific and Technological Innovation Leading Talents Program of Shaanxi Province, and in part by the Foundation of Shaanxi Educational Committee under Grant 17JS086.Peer reviewedPostprin
Radio-wave communication with chaos
This research is supported in part by National Natural Science Foundation of China (61172070), Scientific and Technological Innovation Leading Talents Program of Shaanxi Province, The Key Basic Research Fund of Shaanxi Province (2016ZDJC-01).Peer reviewedPublisher PD
Artificial intelligence enhances the performance of chaotic baseband wireless communication
Funding Information: This work was supported in part by Shaanxi Provincial Special Support Program for Science and Technology Innovation Leader. Dr Bai was supported in part by China Postdoctoral Science Foundation Funded Project (2020M673349), and Open Research Fund from Shaanxi Key Laboratory of Complex System Control and Intelligent Information Processing (2020CP02).Peer reviewedPublisher PD
Waveforms and End-to-End Efficiency in RF Wireless Power Transfer Using Digital Radio Transmitter
We study radio-frequency (RF) wireless power transfer (WPT) using a digital
radio transmitter for applications where alternative analog transmit circuits
are impractical. An important paramter for assessing the viability of an RF WPT
system is its end-to-end efficiency. In this regard, we present a prototype
test-bed comprising a software-defined radio (SDR) transmitter and an energy
harvesting receiver with a low resistive load; employing an SDR makes our
research meaningful for simultaneous wireless information and power transfer
(SWIPT). We analyze the effect of clipping and non-linear amplification at the
SDR on multisine waveforms. Our experiments suggest that when the DC input
power at the transmitter is constant, high peak-to-average power ratio (PAPR)
multisine are unsuitable for RF WPT over a flat-fading channel, due to their
low average radiated power. The results indicate that the end-to-end efficiency
is positively correlated to the average RF power of the waveform, and that it
reduces with increasing PAPR. Consequently, digital modulations such as
phase-shift keying (PSK) and quadrature amplitude modeulation (QAM) yield
better end-to-end efficiency than multisines. Moreover, the end-to-end
efficiency of PSK and QAM signals is invariant of the transmission bit rate. An
in-depth analysis of the end-to-end efficiency of WPT reveals that the
transmitter efficiency is lower than the receiver efficiency. Furthermore, we
study the impact of a reflecting surface on the end-to-end efficiency of WPT,
and assess the transmission quality of the information signals by evaluating
their error vector magnitude (EVM) for SWIPT. Overall, the experimental
observations of end-to-end efficiency and EVM suggest that, while employing an
SDR transmitter with fixed DC input power, a baseband quadrature PSK signal is
most suitable for SWIPT at large, among PSK and QAM signals.Comment: Accepted for publication in IEEE Transactions on Microwave Theory and
Technique
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