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Capacity Bounds and...
Capacity Bounds and Degrees of Freedom for MIMO Antennas
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- Ehrenborg, Casimir (författare)
- Catholic University of Leuven
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- Gustafsson, Mats (författare)
- Lund University,Lunds universitet,Teoretisk elektroteknik,Forskargrupper vid Lunds universitet,Electromagnetic Theory,Lund University Research Groups
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- Capek, Miloslav (författare)
- Czech Technical University in Prague
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(creator_code:org_t)
- 2021
- 2021
- Engelska 13 s.
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Ingår i: IEEE Transactions on Antennas and Propagation. - 0018-926X. ; 69:9, s. 5388-5400
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The optimal spectral efficiency and number of independent channels for MIMO antennas in isotropic multipath channels are investigated when bandwidth requirements are placed on the antenna. By posing the problem as a convex optimization problem restricted by the port Q-factor a semi-analytical expression is formed for its solution. The antennas are simulated by method of moments and the solution is formulated both for structures fed by discrete ports, as well as for design regions characterized by an equivalent current. It is shown that the solution is solely dependent on the eigenvalues of the so-called energy modes of the antenna. The magnitude of these eigenvalues is analyzed for a linear dipole array as well as a plate with embedded antenna regions. The energy modes are also compared to the characteristic modes to validate characteristic modes as a design strategy for MIMO antennas. The antenna performance is illustrated through spectral efficiency over the Q-factor, a quantity that is connected to the capacity. It is proposed that the number of energy modes below a given Q-factor can be used to estimate the degrees of freedom for that Q-factor.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
Nyckelord
- antenna theory
- computational electromagnetics
- degrees of freedom
- eigenvalues and eigenfunctions
- MIMO communication
- optimization
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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