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High capacity wireless systems
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This research area is focused on radio telecommunication systems beyond the
fifth generation that
can guarantee pervasive, high speed connectivity with high energy efficiency.
The key technologies, enabling the expected performance growth of wireless
systems, have to be searched in the fields radio resource allocation,
interference and cooperation management, multiple antennas, new RANs
architectures. We have static simulation tools,
more suitable for network analysis (coverage and capacity), and dynamic simulation tools, for tracking
the time-variant behavior of the network.
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Resource Management |
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OFDMA and multi-carrier systems |
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In OFDMA systems, dynamic radio resource allocation can modify the assignment of
sub-channels (in frequency), modulation profiles, and transmitted power of each
user.
We have developed innovative resource allocation strategies also enhanced by the
awareness of interference relations among the terminals. |
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Applications to
D2D |
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Applications to
NB-IoT |
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Modeling |
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Interesting is the activity in the modelling and estimation of the
inter-cellular interference in the presence of adaptive resource allocation
strategies, also in terms of dynamical, temporal fluctuations. The goal of
this research field is the theoretical evaluation of the network capacity in the presence of
power control, radio resource allocation
algorithms and inter-cellular interference.
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High capacity point-to-point links |
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New strategies for increasing the point-to-point link capacity
are under investigation, with high potential application to the cellular back-hauling
with spectral efficiency greater than 16 bit/s/Hz [13b][17b].
The study has been extended to the analysis of equalization architectures for
MIMO links in presence of impairments like phase noise or frequency offsets. |
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Full Duplex |
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Full-Duplex (FD) radio technology, which enables concurrent transmission and
reception in the same spectrum at the same time, has been implemented
experimentally only for short-range transmissions and it is affected by numerous
limitations. In order to relax the constraints on self-interference
cancellation, we have proposed a Partial-Duplex (PD) approach [17e],
which consists of a communication link with the capability of supporting
connection in both directions at the same time in a portion of the bandwidth
(FD) and with a frequency division for uplink and downlink in the rest of the
band (HD). In this context, we are investigating performance limits [18g]
and encoding solutions [17g]. |
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Information Transmission Group
Dipartimento di Elettronica, Informazione e Bioingengeria (DEIB) Politecnico
di Milano
P.zza Leonardo da Vinci 32, 20133 Milano - Italy
e-mail: luca.reggiani@polimi.it |
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Last updated Jan. 2020 |