A New Multiple Access Technique for 5G: Power Domain Sparse Code Multiple Access (PSMA)

被引:54
作者
Moltafet, Mohammad [1 ]
Mokari, Nader [1 ]
Javan, Mohammad Reza [2 ]
Saeedi, Hamid [1 ]
Pishro-Nik, Hossein [3 ]
机构
[1] Tarbiat Modares Univ, Elect & Comp Engn Dept, Tehran 14115111, Iran
[2] Shahrood Univ Technol, Dept Elect Engn, Shahrood 3619995161, Iran
[3] Univ Massachusetts, Amherst, MA 01003 USA
关键词
Non-orthogonal multiple access (NOMA); sparse code multiple access SCMA; power domain coded sparse code multiple access (PSMA); resource allocation; successive convex approximation; SYSTEMS; ALLOCATION; SUBCARRIER; NETWORKS; CAPACITY; OFDM;
D O I
10.1109/ACCESS.2017.2775338
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 paper, a new approach for multiple access in the fifth generation (5G) of cellular networks called power domain sparse code multiple access (PSMA) is proposed. In PSMA, we adopt both the power domain and the code domain to transmit multiple users' signals over a subcarrier simultaneously. In such a model, the same sparse code multiple-access (SCMA) codebook can be used by multiple users, where, for these users, the power domain non-orthogonal multiple access (PD-NOMA) technique is used to send signals non-orthogonally. Although the signal of different SCMA codebooks can be detected orthogonally, the same codebook used by multiple users produces interference over these users. With PSMA, a codebook can be reused in the coverage area of each base station more than one time, which can improve the spectral efficiency. We investigate the signal model as well as the receiver and transmitter of the PSMA method. In the receiver side, we propose a message passing algorithm-based successive interference cancellation detector to detect the signal of each user. To evaluate the performance of PSMA, we consider a heterogeneous cellular network. In this case, our design objective is to maximize the system sum rate of the network subject to some system level and QoS constraints such as transmit power constraints. We formulate the proposed resource allocation problem as an optimization problem and solve it by successive convex approximation techniques. Moreover, we compare PSMA with SCMA and PD-NOMA from the performance and computational complexity perspective. Finally, the effectiveness of the proposed approach is investigated using numerical results. We show that by a reasonable increase in complexity, PSMA can improve the spectral efficiency about 50% compared with SCMA and PD-NOMA.
引用
收藏
页码:747 / 759
页数:13
相关论文
共 24 条
[1]   What Will 5G Be? [J].
Andrews, Jeffrey G. ;
Buzzi, Stefano ;
Choi, Wan ;
Hanly, Stephen V. ;
Lozano, Angel ;
Soong, Anthony C. K. ;
Zhang, Jianzhong Charlie .
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 2014, 32 (06) :1065-1082
[2]  
[Anonymous], P IEEE GLOB TEL C DE
[3]  
Au K, 2014, IEEE GLOBE WORK, P900, DOI 10.1109/GLOCOMW.2014.7063547
[4]  
Boyd L., 2004, CONVEX OPTIMIZATION
[5]   Subcarrier-Pair Based Resource Allocation for Cooperative Multi-Relay OFDM Systems [J].
Dang, Wenbing ;
Tao, Meixia ;
Mu, Hua ;
Huang, Jianwei .
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2010, 9 (05) :1640-1649
[6]   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
[7]   A General MIMO Framework for NOMA Downlink and Uplink Transmission Based on Signal Alignment [J].
Ding, Zhiguo ;
Schober, Robert ;
Poor, H. Vincent .
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2016, 15 (06) :4438-4454
[8]   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
[9]   Joint Subchannel Assignment and Power Allocation for OFDMA Femtocell Networks [J].
Duy Trong Ngo ;
Khakurel, Suman ;
Tho Le-Ngoc .
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2014, 13 (01) :342-355
[10]   A Minorization-Maximization Method for Optimizing Sum Rate in the Downlink of Non-Orthogonal Multiple Access Systems [J].
Hanif, Muhammad Fainan ;
Ding, Zhiguo ;
Ratnarajah, Tharmalingam ;
Karagiannidis, George K. .
IEEE TRANSACTIONS ON SIGNAL PROCESSING, 2016, 64 (01) :76-88