Title
How Should IRSs Scale to Harden Multi-Antenna Channels?
Abstract
This work extends the concept of channel hardening to multi-antenna systems that are aided by intelligent reflecting surfaces (IRSs). For fading links between a multi-antenna transmitter and a single-antenna receiver, we derive an accurate approximation for the distribution of the input-output mutual information when the number of reflecting elements grows large. The asymptotic results demonstrate that by increasing the number of elements on the IRS, the end-to-end channel hardens as long as the physical dimensions of the IRS grow as well. The growth rate however need not to be of a specific order and can be significantly sub-linear. The validity of the analytical result is confirmed by numerical experiments.
Year
DOI
Venue
2022
10.1109/SAM53842.2022.9827818
2022 IEEE 12th Sensor Array and Multichannel Signal Processing Workshop (SAM)
Keywords
DocType
ISSN
Intelligent reflecting surfaces,channel hardening,large-system analysis
Conference
1551-2282
ISBN
Citations 
PageRank 
978-1-6654-0634-5
0
0.34
References 
Authors
0
6
Name
Order
Citations
PageRank
Ali Bereyhi100.34
Saba Asaad200.34
Chongjun Ouyang300.34
R. Muller41206124.92
Rafael F. Schaefer500.34
H. V. Poor6254111951.66