Energy efficient transmission in dynamic PDMA‐based systems with RF energy harvesting

2020 ◽  
Vol 31 (4) ◽  
Author(s):  
A. Hooshiary ◽  
P. Azmi ◽  
N. Mokari
Keyword(s):  
Energy Harvesting ◽  
Energy Efficient ◽  
Rf Energy Harvesting ◽  
Rf Energy ◽  
Efficient Transmission

scholarly journals An Energy-Efficient UWB Transmitter with Wireless Injection Locking for RF Energy-Harvesting Sensors

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1426 ◽  
Author(s):  
Jun-Tae Kim ◽  
Bo-Ram Heo ◽  
Ickjin Kwon
Keyword(s):  
Energy Consumption ◽  
Energy Harvesting ◽  
Power Consumption ◽  
Energy Efficient ◽  
Rf Energy Harvesting ◽  
Locking Range ◽  
Current Consumption ◽  
Power Operation ◽  
Ultralow Power ◽  
Rf Energy

An ultralow-power ultrawideband (UWB) transmitter with an energy-efficient injection-locked radio frequency (RF) clock harvester that generates a carrier from an RF signal is proposed for RF energy-harvesting Internet-of-Things (IoT) sensor applications. The energy-efficient RF clock harvester based on the injection-locked ring oscillator (ILRO) is proposed to achieve optimal locking range and minimum input sensitivity to obtain an injection-locked 450 MHz clock in ultralow-power operation. A current-starved inverter-based delay stage is adopted that allows delay adjustment by bias voltage to minimize dynamic current consumption while maintaining a constant delay regardless of changes in process, supply voltage, and temperature (PVT). To minimize static current consumption, a UWB transmitter based on a digital-based UWB pulse generator and a pulse-driven switching drive amplifier is proposed. The proposed injection-locked RF clock harvester achieves the best RF input sensitivity of −34 dBm at a power consumption of 2.03 μW, enabling energy-efficient clock harvesting from low RF input power. In ultralow-power operation, a 23.8% locking range is achieved at the RF injection power of −15 dBm to cope with frequency changes due to PVT variations. The proposed UWB transmitter with RF clock harvester achieves the lowest energy consumption per pulse with an average power consumption of 97.03 μW and an energy consumption of 19.41 pJ/pulse, enabling operation with the energy available in RF energy-harvesting applications.

scholarly journals Energy efficient coordinated precoding design for a multicell system with RF energy harvesting

2015 ◽  
Vol 2015 (1) ◽  
Author(s):  
Shiwen He ◽  
Yongming Huang ◽  
Wenyang Chen ◽  
Shi Jin ◽  
Haiming Wang ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Energy Efficient ◽  
Rf Energy Harvesting ◽  
Rf Energy

scholarly journals Energy-Efficient Sub-Carrier and Power Allocation in Cloud-Based Cellular Network With Ambient RF Energy Harvesting

IEEE Access ◽  
2017 ◽  
Vol 5 ◽  
pp. 1340-1352 ◽  
Author(s):  
Yisheng Zhao ◽  
Victor C. M. Leung ◽  
Chunsheng Zhu ◽  
Hui Gao ◽  
Zhonghui Chen ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Power Allocation ◽  
Energy Efficient ◽  
Cellular Network ◽  
Rf Energy Harvesting ◽  
Rf Energy
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