- Recherche et sélection de publications
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On the performance of ESPAR for spatial multiplexing in reception
- Juan Bucheli Garcia #1 #2, Mohamed Kamoun #2, Alain Sibille #1
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| #1 |
Laboratoire traitement et communication de l'information (LTCI)
- Télécm ParisTech
- Institut Mines-Télécom
- Université Paris-Saclay
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| #2 |
Huawei Technologies |
- References
- IEEE Wireless Communications and Networking Conference, Marrakech, Morocco, IEEE, April 2019,
- Abstract
The electronically steerable parasitic array radiator (ESPAR) has been proposed as an inexpensive device for spatial multiplexing in transmission via the so-called beamspace modulation. On the other hand, spatial multiplexing (SM) is well known to allow a linear increase of capacity in MIMO systems with the number of antennas under rich scattering, unlike its corresponding logarithmic increase via signal to noise ratio (SNR). When it comes to ESPAR in reception for SM, nonetheless, the issue at hand is the so-called SNR degradation due to oversampling. In particular, oversampling is required given that, although all parasitic elements can be simultaneously controlled, up to a single simultaneous sample can be conveyed in reception.
The counter intuitive role of the oversampling rate when seen as the number of spatial samples and its negative impact on SNR is studied in the present paper. It is shown that, from a capacity perspective, the ideal number of spatial samples depends on both the SNR and channel conditions. Furthermore, an algorithm for capacity maximization over the set of reactive loads relying on the simultaneous perturbation stochastic approximation method (SPSA) is shown. Particularly, as an extension of previous work, such an algorithm converges to analog maximum ratio combining (A-MRC) when the oversampling rate is equal to one.
- Keywords
- ESPAR, MIMO, Capacity, SPSA, SNR degradation
- Category
- Paper in proceedings
- Research Area(s)
- Computer Science/Networking and Internet Architecture
Engineering Sciences/Electromagnetism
- Identifier(s)
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Bibliographic key JB:WCNC-2019A
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- Last update
- on september 08, 2019 by Alain Sibille
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