Journal
IEEE WIRELESS COMMUNICATIONS LETTERS
Volume 9, Issue 2, Pages 244-248Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2019.2950624
Keywords
Relays; Resource description framework; Signal to noise ratio; Receivers; Surface waves; Wireless communication; Transceivers; Intelligent reflecting surface; DF relaying
Categories
Funding
- Excellence Center at Linkoping - Lund in Information Technology (ELLIIT)
- Swedish Research Council
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The rate and energy efficiency of wireless channels can be improved by deploying software-controlled metasurfaces to reflect signals from the source to the destination, especially when the direct path is weak. While previous works mainly optimized the reflections, this letter compares the new technology with classic decode-and-forward (DF) relaying. The main observation is that very high rates and/or large metasurfaces are needed to outperform DF relaying, both in terms of minimizing the total transmit power and maximizing the energy efficiency, which also includes the dissipation in the transceiver hardware.
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