Double-Active-IRS Aided Wireless Communication: Deployment Optimization and Capacity Scaling

被引:14
作者
Kang, Zhenyu [1 ]
You, Changsheng [2 ]
Zhang, Rui [1 ,3 ]
机构
[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117583, Singapore
[2] Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
[3] Chinese Univ Hong Kong Shenzhen, Shenzhen Res Inst Big Data, Sch Sci & Engn, Shenzhen 518172, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Wireless communication; Reflection; Array signal processing; Signal to noise ratio; Resource management; Optimization; Azimuth; Intelligent reflecting surface (IRS); active IRS; double IRS; capacity scaling order;
D O I
10.1109/LWC.2023.3294258
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this letter, we consider a double-active-intelligent reflecting surface (IRS) aided wireless communication system, where two active IRSs assist the communication from a base station (BS) to multiple users via double-reflection links. Under the assumption of fixed per-element amplification power for each active-IRS element, we formulate a rate maximization problem subject to practical constraints on the reflection design, elements allocation, and placement of active IRSs. To solve this non-convex problem, we first obtain the optimal active-IRS reflections and BS beamforming, based on which we then jointly optimize the active-IRS elements allocation and placement by using the alternating optimization (AO) method. Moreover, we show that given the fixed per-element amplification power, the received signal-to-noise ratio (SNR) at the user increases asymptotically with the square of the number of reflecting elements; while given the fixed number of reflecting elements, the SNR does not increase with the per-element amplification power when it is asymptotically large. Finally, numerical results validate the proposed algorithm and compare the rate performance to benchmark systems.
引用
收藏
页码:1821 / 1825
页数:5
相关论文
共 11 条
[1]   Present and Future of Reconfigurable Intelligent Surface-Empowered Communications [Perspectives] [J].
Basar, Ertugrul ;
Poor, H. Vincent .
IEEE SIGNAL PROCESSING MAGAZINE, 2021, 38 (06) :146-152
[2]   Cooperative Double-IRS Aided Communication: Beamforming Design and Power Scaling [J].
Han, Yitao ;
Zhang, Shuowen ;
Duan, Lingjie ;
Zhang, Rui .
IEEE WIRELESS COMMUNICATIONS LETTERS, 2020, 9 (08) :1206-1210
[3]   An Amplifying Reconfigurable Reflectarray Antenna [J].
Kishor, Krishna Kumar ;
Hum, Sean Victor .
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2012, 60 (01) :197-205
[4]   Active-IRS Aided Wireless Network: System Modeling and Performance Analysis [J].
Li, Yunli ;
You, Changsheng ;
Chun, Young Jin .
IEEE COMMUNICATIONS LETTERS, 2023, 27 (02) :487-491
[5]   Reconfigurable Intelligent Surfaces: Principles and Opportunities [J].
Liu, Yuanwei ;
Liu, Xiao ;
Mu, Xidong ;
Hou, Tianwei ;
Xu, Jiaqi ;
Di Renzo, Marco ;
Al-Dhahir, Naofal .
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS, 2021, 23 (03) :1546-1577
[6]   Active Reconfigurable Intelligent Surface-Aided Wireless Communications [J].
Long, Ruizhe ;
Liang, Ying-Chang ;
Pei, Yiyang ;
Larsson, Erik G. .
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2021, 20 (08) :4962-4975
[7]   Intelligent Reflecting Surface-Aided Wireless Communications: A Tutorial [J].
Wu, Qingqing ;
Zhang, Shuowen ;
Zheng, Beixiong ;
You, Changsheng ;
Zhang, Rui .
IEEE TRANSACTIONS ON COMMUNICATIONS, 2021, 69 (05) :3313-3351
[8]   Wireless Communication Aided by Intelligent Reflecting Surface: Active or Passive? [J].
You, Changsheng ;
Zhang, Rui .
IEEE WIRELESS COMMUNICATIONS LETTERS, 2021, 10 (12) :2659-2663
[9]   Wireless Communication via Double IRS: Channel Estimation and Passive Beamforming Designs [J].
You, Changsheng ;
Zheng, Beixiong ;
Zhang, Rui .
IEEE WIRELESS COMMUNICATIONS LETTERS, 2021, 10 (02) :431-435
[10]   Double-IRS Assisted Multi-User MIMO: Cooperative Passive Beamforming Design [J].
Zheng, Beixiong ;
You, Changsheng ;
Zhang, Rui .
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2021, 20 (07) :4513-4526