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On the Position of ...
On the Position of Intelligent Reflecting Surfaces
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- Ibrahim, Emad (författare)
- Luleå tekniska universitet,Signaler och system
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- Nilsson, Rickard (författare)
- Luleå tekniska universitet,Signaler och system
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- van de Beek, Jaap, Professor, 1967- (författare)
- Luleå tekniska universitet,Signaler och system
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(creator_code:org_t)
- IEEE, 2021
- 2021
- Engelska.
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Ingår i: 2021 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit). - : IEEE. ; , s. 66-71
- Relaterad länk:
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https://ltu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We study the positional impact of an intelligent reflecting surface (IRS) on the achievable rate for single and multiple antenna systems. We show that in IRS-aided single antenna systems, it is always best to place the IRS as close as possible to the transmitter or receiver since the large-scale fading for IRS-reflected links is the main factor that characterizes the performance gain. However, for IRS-aided multiple antenna systems, the propagation environment has an important role in characterizing the efficient regions of IRS placement. In the case of a line-of-sight environment, the channel matrix turns out to be rank-deficient. Thus, both far and near IRS placements result in significant achievable rate improvements where the former provides a substantial additional degree-of-freedom, while the latter results in a power gain. Furthermore, as the wireless channel becomes richer with multipath, the rank of the channel matrix increases. Thus, the efficient far placement regions gradually shrink until they disappear in the case of a Rayleigh fading channel where IRS near placements become more efficient than far placements as they result in higher power gains.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Nyckelord
- Intelligent reflecting surface
- Position analysis
- Signalbehandling
- Signal Processing
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)