TY - JOUR
T1 - Cooperative Double-IRS Aided Communication: Beamforming Design and Power Scaling
AU - Han, Yitao
AU - Zhang, Shuowen
AU - Duan, Lingjie
AU - Zhang, Rui
N1 - Funding Information:
Manuscript received March 9, 2020; accepted April 3, 2020. Date of publication April 8, 2020; date of current version August 7, 2020. This work was supported by the Ministry of Education, Singapore, through its Academic Research Fund Tier 2 under Grant MOE2016-T2-1-173. The associate editor coordinating the review of this article and approving it for publication was J. Tang. (Corresponding author: Lingjie Duan.) Yitao Han is with the Engineering Systems and Design Pillar, Singapore University of Technology and Design, Singapore, and also with the Department of Electrical and Computer Engineering, National University of Singapore, Singapore (e-mail: [email protected]).
Publisher Copyright:
© 2012 IEEE.
PY - 2020/8
Y1 - 2020/8
N2 - Intelligent reflecting surface (iRS) Is a promising technology to support high performance wireless communication. By adaptively configuring the reflection amplitude and/or phase of each passive reflecting element on It, the IRS can reshape the electromagnetic environment In favour of signal transmission. This letter advances the existing research by proposing and analyzing a double-iRS aided wireless communication system. Under the reasonable assumption that the reflection channel from IRS 1 to IRS 2 Is of rank 1 (e.g., line-of-sight channel), we propose a joint passive beamforming design for the two IRSs. Based on this, we show that deploying two cooperative IRSs with In total {K} elements can yield a power gain of order \mathcal {O}(K^{4}) , which greatly outperforms the case of deploying one traditional IRS with a power gain of order \mathcal {O}(K^{2}). Our simulation results validate that the performance of deploying two cooperative IRSs Is significantly better than that of deploying one IRS given a sufficient total number of IRS elements. We also extend our line-of-sight channel model to show how different channel models affect the performance of the double-iRS aided wireless communication system.
AB - Intelligent reflecting surface (iRS) Is a promising technology to support high performance wireless communication. By adaptively configuring the reflection amplitude and/or phase of each passive reflecting element on It, the IRS can reshape the electromagnetic environment In favour of signal transmission. This letter advances the existing research by proposing and analyzing a double-iRS aided wireless communication system. Under the reasonable assumption that the reflection channel from IRS 1 to IRS 2 Is of rank 1 (e.g., line-of-sight channel), we propose a joint passive beamforming design for the two IRSs. Based on this, we show that deploying two cooperative IRSs with In total {K} elements can yield a power gain of order \mathcal {O}(K^{4}) , which greatly outperforms the case of deploying one traditional IRS with a power gain of order \mathcal {O}(K^{2}). Our simulation results validate that the performance of deploying two cooperative IRSs Is significantly better than that of deploying one IRS given a sufficient total number of IRS elements. We also extend our line-of-sight channel model to show how different channel models affect the performance of the double-iRS aided wireless communication system.
KW - Intelligent reflecting surface
KW - channel modelling
KW - passive beamforming
KW - power scaling
UR - http://www.scopus.com/inward/record.url?scp=85089527857&partnerID=8YFLogxK
U2 - 10.1109/LWC.2020.2986290
DO - 10.1109/LWC.2020.2986290
M3 - Journal article
SN - 2162-2337
VL - 9
SP - 1206
EP - 1210
JO - IEEE Wireless Communications Letters
JF - IEEE Wireless Communications Letters
IS - 8
M1 - 9060923
ER -