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This paper investigates a large-scale cognitive radio network with primary users (PUs) and secondary users (SUs) spatially and randomly distributed. All the PUs need to harvest wireless energy from their associated access points (APs) before transmitting information. To combat the low efficiency of wireless power transfer caused by the severe path-loss, we propose to apply an energy cooperation zone...
By enabling wireless devices to be charged wirelessly and remotely, radio frequency energy harvesting (RFEH) has become a promising technology to power the unattended Internet of Things (IoT) low-power devices. To enable this, in future IoT networks, besides the conventional data access points (DAPs) responsible for collecting data from IoT devices, energy access points (EAPs) should be deployed to...
We consider an energy harvesting (EH) based cooperative relaying network, where two half-duplex relays can alternatively forward source data to the destination. The power-splitting technique is implemented at each relay. That is, part of the received source signal and inter-relay interference is allocated for the EH, while the remaining part is used for the information decoding (ID). The inter-relay...
This paper proposes a traceable and practical approach to measure the modulation error ratio (MER) and the power level of digital radio frequency (RF) TV signals. We use calibrated vector signal generator and sampling oscilloscope as both reference and standard to build the MER measurement system and improve the time-base error correction algorithm to increase the accuracy simultaneously; According...
The fabrication and radio frequency (RF) protection ability of semiconductor junction igniter (SJI) is presented. The SJI consists of two back-to-back PN junctions, with a predesigned size, which is designed to protect against the RF and electrostatic discharge events. The effect of doping density on electromagnetic susceptibility of SJI is studied by two kinds of SJI. In addition, SJI under different...
A traceable method for measuring modulation error of radio frequency signals has been demonstrated in this article. This method uses sampling oscilloscope and two quadrature sinusoidal signals generated simultaneously from a continuous waveform (CW) generator to build the measurement system. It improves correlation algorithms and obtains the measurement results accurately. It provides a traceable...
This paper investigates a wireless-powered communication network (WPCN) setup with one multi- antenna access point (AP) and one single-antenna source. It is assumed that the AP is connected to an external power supply, while the source does not have an embedded energy supply. But the source could harvest energy from radio frequency (RF) signals sent by the AP and store it for future information transmission...
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