Hybrid virtual polarimetric massive MIMO measurements at 1.35 GHz
Résumé
The polarimetric massive multiple‐input multiple‐output (MIMO) radio channel of an indoor line‐of‐sight scenario is investigated at 1.35 GHz using a real‐time radio channel sounder. The 8 × 12 massive MIMO transmitter is constructed using a hybrid architecture including a vertical uniform linear array translated at different horizontal positions forming a virtual, yet realistic, uniform rectangular array. The performance of the system is evaluated with six users distributed in the room for different polarisation schemes and receiver orientations using propagation channel‐based metrics (such as receiver spatial correlation and Rician factor) and system‐oriented metrics such as sum‐rate capacity and signal to interference and noise ratio. The results show a clear dependence of the performance to the polarisation schemes and receiver orientation and showing that when facing the array, cross‐polarisation can be very beneficial. Furthermore, it is concluded that the additional degree of freedom brought by the polarisation diversity can contribute to improve spectral efficiency (∼20% depending on the configuration), paving the way for further capacity enhancements in massive MIMO systems. It was also found that the receiver spatial correlation can be modelled using a Burr distribution.
Mots clés
MIMO systems
Rician channels
MIMO communication
wireless channels
antenna arrays
indoor radio
yet realistic array
uniform rectangular array
different polarisation schemes
receiver orientation
propagation channel‐based metrics
receiver spatial correlation
system‐oriented metrics
sum‐rate capacity
signal
cross‐polarisation
massive MIMO systems
hybrid virtual polarimetric massive MIMO measurements
polarimetric massive multiple‐input
line‐of‐sight scenario
GHz
real‐time radio channel sounder
8 × 12 massive MIMO transmitter
hybrid architecture
vertical uniform linear array
different horizontal positions
virtual array
frequency 1.35 GHz
multiple‐output radio channel
Domaines
Sciences de l'ingénieur [physics]| Origine | Fichiers produits par l'(les) auteur(s) |
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