TY - GEN
T1 - Multiuser MIMO with Large Intelligent Surfaces: Communication Model and Transmit Design
AU - Williams, Robin Jess
AU - Espinosa, Pablo Ramirez
AU - De Carvalho, Elisabeth
AU - L. Marzetta, Thomas
PY - 2021/6/23
Y1 - 2021/6/23
N2 - This paper proposes a communication model for multiuser multiple-input multiple-output (MIMO) systems based on large intelligent surfaces (LIS), where the LIS is modeled as a collection of tightly packed antenna elements. The LIS system is first represented in a circuital way, obtaining expressions for the radiated and received powers, as well as for the coupling between the distinct elements. Then, this circuital model is used to characterize the channel in a line-of-sight propagation scenario, rendering the basis for the analysis and design of MIMO systems. Due to the particular properties of LIS, the model accounts for superdirectivity and mutual coupling effects along with near field propagation, necessary in those situations where the array dimension becomes very large. Finally, with the proposed model, the matched filter transmitter and the weighted minimum mean square error precoding are derived under both realistic constraints: limited radiated power and maximum ohmic losses.
AB - This paper proposes a communication model for multiuser multiple-input multiple-output (MIMO) systems based on large intelligent surfaces (LIS), where the LIS is modeled as a collection of tightly packed antenna elements. The LIS system is first represented in a circuital way, obtaining expressions for the radiated and received powers, as well as for the coupling between the distinct elements. Then, this circuital model is used to characterize the channel in a line-of-sight propagation scenario, rendering the basis for the analysis and design of MIMO systems. Due to the particular properties of LIS, the model accounts for superdirectivity and mutual coupling effects along with near field propagation, necessary in those situations where the array dimension becomes very large. Finally, with the proposed model, the matched filter transmitter and the weighted minimum mean square error precoding are derived under both realistic constraints: limited radiated power and maximum ohmic losses.
KW - Beamforming
KW - holographic MIMO
KW - large intelligent surfaces
KW - super-directivity
UR - http://www.scopus.com/inward/record.url?scp=85115728732&partnerID=8YFLogxK
U2 - 10.1109/ICC42927.2021.9500830
DO - 10.1109/ICC42927.2021.9500830
M3 - Article in proceeding
SN - 978-1-7281-7123-4
T3 - I E E E International Conference on Communications
SP - 1
EP - 6
BT - ICC 2021 - IEEE International Conference on Communications
PB - IEEE
T2 - 2021 IEEE International Conference on Communications Workshops (ICC Workshops)
Y2 - 14 June 2021 through 23 June 2021
ER -