O. L. A. López, B. Clerckx and M. Latva-Aho, "Dynamic RF Combining for Multi-Antenna Ambient Energy Harvesting," in IEEE Wireless Communications Letters, vol. 11, no. 3, pp. 493-497, March 2022, doi: 10.1109/LWC.2021.3133623
Dynamic RF combining for multi-antenna ambient energy harvesting
|Author:||López, Onel L. A.1; Clerckx, Bruno2; Latva-Aho, Matti1|
1Centre for Wireless Communications, University of Oulu, 90570 Oulu, Finland
2Department of Electrical and Electronic Engineering, Imperial College London, London SW7 2AZ, U.K.
|Online Access:||PDF Full Text (PDF, 0.6 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2022051736110
Institute of Electrical and Electronics Engineers,
|Publish Date:|| 2022-05-17
Ambient radio frequency (RF) energy harvesting (EH) technology is key to realize self-sustainable, always-on, low-power, massive Internet of Things networks. Typically, rigid (non-adaptable to channel fluctuations) multi-antenna receive architectures are proposed to support reliable EH operation. Herein, we introduce a dynamic RF combining architecture for ambient RF EH use cases, and exemplify the attainable performance gains via three simple phase shifts’ exploration mechanisms, namely, brute force (BF), sequential testing (ST) and codebook based (CB). Among the proposed mechanisms, BF demands the highest power consumption, while CB requires the highest-resolution phase shifters, thus tipping the scales in favor of ST. Finally, we show that the performance gains of ST over a rigid RF combining scheme increase with the number of receive antennas and energy transmitters’ deployment density.
IEEE wireless communications letters
|Pages:||493 - 497|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
213 Electronic, automation and communications engineering, electronics
This work was supported by the Academy of Finland through 6Genesis Flagship
under Grant 318927.
|Academy of Finland Grant Number:||
318927 (Academy of Finland Funding decision)
© The Author(s) 2022. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/.