TY - JOUR
T1 - On the Performance of Non-orthogonal Multiple Access Systems With Partial Channel Information
AU - Yang, Zheng
AU - Ding, Zhiguo
AU - Fan, Pingzhi
AU - Karagiannidis, George K.
N1 - Funding Information:
The work of Z. Yang and P. Fan was supported by the National Science Foundation of China (NSFC, No. 61471302), the National Science and Technology Major Project (No. 2016ZX03001018-002), and the 111 Project (No. 111-2-14). The work of Z. Ding was supported by the UK EPSRC under grant number EP/L025272/1. The associate editor coordinating the review of this paper and approving it for publication was Z. Dawy.
Publisher Copyright:
© 2015 IEEE.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - In this paper, a downlink single-cell non-orthogonal multiple access (NOMA) network with uniformly deployed users is considered and an analytical framework to evaluate its performance is developed. Particularly, the performance of NOMA is studied by assuming two types of partial channel state information (CSI). For the first one, which is based on imperfect CSI, we present a simple closed-form approximation for the outage probability and the average sum rate, as well as their high signal-to-noise ratio (SNR) expressions. For the second type of CSI, which is based on second order statistics (SOS), we derive a closed-form expression for the outage probability and an approximate expression for the average sum rate for the special case two users. For the addressed scenario with the two types of partial CSI, the results demonstrate that NOMA can achieve superior performance compared to the traditional orthogonal multiple access (OMA). Moreover, SOS-based NOMA always achieves better performance than that with imperfect CSI, while it can achieve similar performance to the NOMA with perfect CSI at the low SNR region. The provided numerical results confirm that the derived expressions for the outage probability and the average sum rate match well with the Monte Carlo simulations.
AB - In this paper, a downlink single-cell non-orthogonal multiple access (NOMA) network with uniformly deployed users is considered and an analytical framework to evaluate its performance is developed. Particularly, the performance of NOMA is studied by assuming two types of partial channel state information (CSI). For the first one, which is based on imperfect CSI, we present a simple closed-form approximation for the outage probability and the average sum rate, as well as their high signal-to-noise ratio (SNR) expressions. For the second type of CSI, which is based on second order statistics (SOS), we derive a closed-form expression for the outage probability and an approximate expression for the average sum rate for the special case two users. For the addressed scenario with the two types of partial CSI, the results demonstrate that NOMA can achieve superior performance compared to the traditional orthogonal multiple access (OMA). Moreover, SOS-based NOMA always achieves better performance than that with imperfect CSI, while it can achieve similar performance to the NOMA with perfect CSI at the low SNR region. The provided numerical results confirm that the derived expressions for the outage probability and the average sum rate match well with the Monte Carlo simulations.
KW - imperfect channel state information
KW - Non-orthogonal multiple access
KW - second order statistics
KW - uniform distribution
UR - http://www.scopus.com/inward/record.url?scp=84962428218&partnerID=8YFLogxK
U2 - 10.1109/TCOMM.2015.2511078
DO - 10.1109/TCOMM.2015.2511078
M3 - Article
AN - SCOPUS:84962428218
SN - 0090-6778
VL - 64
SP - 654
EP - 667
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 2
M1 - 7361990
ER -