A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
RIS‐Aided Massive MIMO Antennas*
In this chapter, we propose and study an antenna structure where a (not large) array of radiating elements is placed at short distance in front of a passive reconfigurable intelligent surface (RIS). In this new structure, we detail a channel estimation procedure using different configurations of the RIS elements and derive a closed‐form expression for the hardening lower‐bound of the downlink performance. Next, we formulate an optimization problem, with respect to the phase shifts of the RIS, aimed at minimizing the channel cross‐correlations while preserving the channel individual norms. The numerical analysis shows that the proposed structure is capable of overcoming the performance of a conventional massive MIMO system without the RIS.
RIS‐Aided Massive MIMO Antennas*
In this chapter, we propose and study an antenna structure where a (not large) array of radiating elements is placed at short distance in front of a passive reconfigurable intelligent surface (RIS). In this new structure, we detail a channel estimation procedure using different configurations of the RIS elements and derive a closed‐form expression for the hardening lower‐bound of the downlink performance. Next, we formulate an optimization problem, with respect to the phase shifts of the RIS, aimed at minimizing the channel cross‐correlations while preserving the channel individual norms. The numerical analysis shows that the proposed structure is capable of overcoming the performance of a conventional massive MIMO system without the RIS.
RIS‐Aided Massive MIMO Antennas*
Wu, Qingqing (editor) / Duong, Trung Q. (editor) / Ng, Derrick Wing Kwan (editor) / Schober, Robert (editor) / Zhang, Rui (editor) / Buzzi, Stefano (author) / D'Andrea, Carmen (author) / Interdonato, Giovanni (author)
2023-12-27
22 pages
Article/Chapter (Book)
Electronic Resource
English
An adaptive hybrid MIMO scheme with fixed antennas
| IEEE | 2006
Comparative Analysis of Data Detection Techniques for 5G Massive MIMO Systems
| DOAJ | 2020