Page 11 - ITU Journal Future and evolving technologies Volume 2 (2021), Issue 6 – Wireless communication systems in beyond 5G era

ITU Journal on Future and Evolving Technologies, Volume 2 (2021), Issue 6

Massive distributed IRS aided wireless communication with ON/OFF

selection

Pages 83–92
Riku Ohmiya, Tomoki Murakami, Masaaki Nishino, Yoghitha Ramamoorthi, Masashi Iwabuchi,
Tomoaki Ogawa, Yasushi Takatori

The mobile communication system beyond fifth-generation (beyond 5G) is required to maintain higher
transmission capacity and reliability than existing 5G systems. To meet these requirements, one
promising solution is to incorporate an Intelligent Reflecting Surface (IRS). The IRS involves
reconfiguring the wireless propagation environment and exploiting the radio resources, not only in the
conventional frequency and time domains but also in the spatial domain by controlling the reflection
amplitude and phase of the incident electromagnetic signal. However, increased deployment of IRSs
brings about interference and greater complexity. Therefore, in this paper, we propose an ON/OFF IRS
selection method on massive IRS aided wireless communications that can simultaneously achieve
interference suppression and capacity improvement. In addition, the proposed method reduces
operational complexity using a simple 1-bit control. The results of computer simulation and experiment
show that the proposed method can improve the desired channel capacity beyond directly Single-Input
Single-Output (SISO) communication without IRS while maintaining the interference level of an
interfered receiver below a certain threshold.
View Article

– ix –