Impact of Mutual Coupling on Power-Domain Non-Orthogonal Multiple Access (NOMA)

被引:6
作者
Thet, Nann Win Moe [1 ]
Khan, Sana [1 ]
Arvas, Ercument [2 ]
Ozdemir, Mehmet Kemal [2 ]
机构
[1] Istanbul Medipol Univ, Grad Sch Engn & Nat Sci, TR-34810 Istanbul, Turkey
[2] Istanbul Medipol Univ, Sch Engn & Nat Sci, TR-34810 Istanbul, Turkey
来源
IEEE ACCESS | 2020年 / 8卷 / 08期
关键词
NOMA; Mutual coupling; Three-dimensional displays; Array signal processing; Linear antenna arrays; Symmetric matrices; Non-orthogonal multiple access (NOMA); multi-user beamforming; millimeter wave; sum-rate; mutual coupling (MC); uniform linear array (ULA); uniform circular array (UCA); 3D UCA; MIMO; ANTENNA; ARRAYS; NETWORKS;
D O I
10.1109/ACCESS.2020.3030110
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This paper investigates the impact of mutual coupling (MC) on the achievable sum-rate of power-domain non-orthogonal multiple access (NOMA) system in both uplink (UL) and downlink (DL) transmissions. We assume a single-antenna user NOMA system with directional beamforming in the millimeter wave (mmW) channel. Due to the electromagnetic interaction between the antenna elements, called mutual coupling, at the base station (BS), the steering vector of the channel is affected. Consequently, this leads to distorted antenna pattern pointing towards different directions and reduction in channel gain, based on antenna array structure. In this paper, different antenna geometries and configurations, such as one-dimensional (1D) uniform linear array (ULA), two-dimensional (2D), and three-dimensional (3D) uniform circular array (UCA), are implemented at the BS, where induced electromotive force (EMF) and method of moment (MOM) techniques are used to generate the MC coefficients. We first examine the antenna patterns affected by MC, followed by channel gains of user terminals (UT)s. Then sum-rate of the NOMA system is modified in the presence of MC. Furthermore, mutual coupling is compensated successfully for both UL and DL systems for the given antenna structures. Simulation results show that mutual coupling degrades the sum-rate performance of the NOMA system in all three array structures, especially in the UCA structure due to the smaller spacing of the array element in a circular shape, resulting in symmetric mutual coupling from both sides of the circle. On the other hand, it is also shown that compensating the mutual coupling effect by the MOM technique in the case of unknown MC or matrix inversion in the case of known MC significantly improves the system sum-rate in all scenarios.
引用
收藏
页码:188401 / 188414
页数:14
相关论文
共 41 条
[1]   Directions of arrival estimation with planar antenna arrays in the presence of mutual coupling [J].
Akkar, Salem ;
Harabi, Ferid ;
Gharsallah, Ali .
INTERNATIONAL JOURNAL OF ELECTRONICS, 2013, 100 (06) :818-836
[2]   A Tutorial on Nonorthogonal Multiple Access for 5G and Beyond [J].
Aldababsa, Mahmoud ;
Toka, Mesut ;
Gokceli, Selahattin ;
Kurt, Gunes Karabulut ;
Kucur, Oguz .
WIRELESS COMMUNICATIONS & MOBILE COMPUTING, 2018,
[3]  
[Anonymous], 2017, MILLIMETER WAVE COMM
[4]  
[Anonymous], 2016, ANTENNA THEORY ANAL
[5]  
Chen W., 2019, INT J AEROSP ENG, V2019, P1
[6]   Impact of antenna coupling on 2 x 2 MIMO communications [J].
Clerckx, Bruno ;
Craeye, Christophe ;
Vanhoenacker-Janvier, Danielle ;
Oestges, Claude .
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 2007, 56 (03) :1009-1018
[7]   BROADCAST CHANNELS [J].
COVER, TM .
IEEE TRANSACTIONS ON INFORMATION THEORY, 1972, 18 (01) :2-+
[8]   NOMA Meets Finite Resolution Analog Beamforming in Massive MIMO and Millimeter-Wave Networks [J].
Ding, Zhiguo ;
Dai, Linglong ;
Schober, Robert ;
Poor, H. Vincent .
IEEE COMMUNICATIONS LETTERS, 2017, 21 (08) :1879-1882
[9]   Effect of mutual coupling on the interference rejection capabilities of linear and circular arrays in CDMA systems [J].
Durrani, S ;
Bialkowski, ME .
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2004, 52 (04) :1130-1134
[10]   Effect of mutual coupling and configuration of concentric circular array antenna on the signal-to-interference performance in CDMA systems [J].
Fallahi, R. ;
Roshandel, M. .
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER, 2007, 76 :427-447