A Virtual User Pairing Scheme to Optimally Utilize the Spectrum of Unpaired Users in Non-orthogonal Multiple Access

被引:77
作者
Shahab, Muhammad Basit [1 ]
Kader, Md Fazlul [1 ]
Shin, Soo Young [1 ]
机构
[1] Kumoh Natl Inst Technol, WENS Lab, Dept IT Convergence Engn, Gumi 39177, South Korea
基金
新加坡国家研究基金会;
关键词
Conventional multiple access; ergodic sum capacity; non-orthogonal multiple access (NOMA); user pairing; SYSTEMS;
D O I
10.1109/LSP.2016.2619371
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This letter proposes a strategy to efficiently utilize the spectrum of unpaired users in non-orthogonal multiple access (NOMA) systems. This is done by pairing multiple similar gain users to a single distant user in a nonoverlapping frequency band pairing fashion. We consider a case where the number of far users in a cell is larger than the number of near users. Thus, some far users cannot be paired and should get data using conventional multiple access (OMA). In such case, we propose a strategy where a near user can be paired with multiple (two) far users to optimally utilize the spectrum of unpaired users in the NOMA system. Performance of the proposed pairing scheme is evaluated in terms of ergodic sum capacity over independent Rayleigh flat fading channel. Analytical and simulation results show that significant increase in the capacity gain of the system is achieved by using the proposed strategy compared to OMA and conventional NOMA.
引用
收藏
页码:1766 / 1770
页数:5
相关论文
共 9 条
[2]   Impact of User Pairing on 5G Nonorthogonal Multiple-Access Downlink Transmissions [J].
Ding, Zhiguo ;
Fan, Pingzhi ;
Poor, H. Vincent .
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 2016, 65 (08) :6010-6023
[3]   On the Performance of Non-Orthogonal Multiple Access in 5G Systems with Randomly Deployed Users [J].
Ding, Zhiguo ;
Yang, Zheng ;
Fan, Pingzhi ;
Poor, H. Vincent .
IEEE SIGNAL PROCESSING LETTERS, 2014, 21 (12) :1501-1505
[4]   Non-orthogonal Multiple Access (NOMA) with Successive Interference Cancellation for Future Radio Access [J].
Higuchi, Kenichi ;
Benjebbour, Anass .
IEICE TRANSACTIONS ON COMMUNICATIONS, 2015, E98B (03) :403-414
[5]   5G Network Capacity [J].
Li, Qian ;
Niu, Huaning ;
Papathanassiou, Apostolos ;
Wu, Geng .
IEEE VEHICULAR TECHNOLOGY MAGAZINE, 2014, 9 (01) :71-78
[6]  
Saito K., 2015, 2015 IEEE International Magnetics Conference (INTERMAG), DOI 10.1109/INTMAG.2015.7157771
[7]  
Saito K, 2015, IEEE INT CONF COMM, P1161, DOI 10.1109/ICCW.2015.7247334
[8]  
Shahab M. B., 2016, WIREL COMMUN MOBILE
[9]  
Yan C., 2015, P 1EEE 81 VEH TECHN, P1, DOI DOI 10.1109/VTC-SPRING.2015.7146043