Intelligent Reflecting Surface Versus Decode-and-Forward: How Large Surfaces are Needed to Beat Relaying?
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 techno...
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| Published in | IEEE wireless communications letters Vol. 9; no. 2; pp. 244 - 248 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
Piscataway
IEEE
01.02.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subjects | |
| Online Access | Get full text |
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| Abstract | 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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| AbstractList | 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. |
| Author | Ozdogan, Ozgecan Bjornson, Emil Larsson, Erik G. |
| Author_xml | – sequence: 1 givenname: Emil orcidid: 0000-0002-5954-434X surname: Bjornson fullname: Bjornson, Emil email: bjornson@liu.se organization: Department of Electrical Engineering (ISY), Linköping University, Linköping, Sweden – sequence: 2 givenname: Ozgecan orcidid: 0000-0001-7397-0946 surname: Ozdogan fullname: Ozdogan, Ozgecan email: ozgecan.ozdogan@liu.se organization: Department of Electrical Engineering (ISY), Linköping University, Linköping, Sweden – sequence: 3 givenname: Erik G. orcidid: 0000-0002-7599-4367 surname: Larsson fullname: Larsson, Erik G. email: erik.g.larsson@liu.se organization: Department of Electrical Engineering (ISY), Linköping University, Linköping, Sweden |
| BackLink | https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296064$$DView record from Swedish Publication Index https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-164680$$DView record from Swedish Publication Index |
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| SubjectTerms | DF relaying Energy dissipation Energy efficiency Intelligent reflecting surface New technology Power efficiency Receivers Reconfigurable intelligent surfaces Relaying Relays Resource description framework Signal to noise ratio Surface waves Transceivers Wireless communication |
| Title | Intelligent Reflecting Surface Versus Decode-and-Forward: How Large Surfaces are Needed to Beat Relaying? |
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