TY - JOUR
T1 - On Downlink NOMA in Heterogeneous Networks with Non-Uniform Small Cell Deployment
AU - Han, Tao
AU - Gong, Jie
AU - Liu, Xiong
AU - Islam, S. M.Riazul
AU - Li, Qiang
AU - Bai, Zhiquan
AU - Kwak, Kyung Sup
N1 - Funding Information:
This work was supported in part by the National Natural Science Foundation of China under Grants 61471180 and 61771291, in part by the Key Research and Development Plan of Shandong Province under Grant 2018GGX101009, in part by the EU FP7-PEOPLE-IRSES under Grant 610524, in part by the Ministry of Science, ICT (MSIT), South Korea, supervised by the IITP through the ITRC support program under Grant IITP-2018-2014-1-00729, and in part by the China International Joint Research Center of Green Communications and Networking under Grant 2015B01008.
Publisher Copyright:
© 2013 IEEE.
PY - 2018/6/26
Y1 - 2018/6/26
N2 - Compared to orthogonal multiple access (OMA), non-orthogonal multiple access (NOMA) can achieve higher spectral efficiency by exploiting the power domain multiplexing. In this paper, we investigate the performance of NOMA in a two-tier heterogeneous network (HetNet) with non-uniform small cell deployment, where critical performance metrics like coverage probability and achievable rate are analyzed. First, a NOMA-based HetNet model is established, where users are paired based on the proposed user pairing scheme. Then the distribution of the order statistics for the distances between different NOMA users and the serving base station (BS) is presented considering the channel qualities from the NOMA users to the BSs. On this basis, we analytically demonstrate the impact of various network parameters on the coverage probability and achievable rate of NOMA users, such as signal-to-interference-plus-noise ratio threshold and BS density. Furthermore, an analysis is presented to provide insight into the energy efficiency of the considered system. Finally, extensive simulation and comparisons are conducted, which validate the advantages of NOMA over OMA in the considered HetNet environment.
AB - Compared to orthogonal multiple access (OMA), non-orthogonal multiple access (NOMA) can achieve higher spectral efficiency by exploiting the power domain multiplexing. In this paper, we investigate the performance of NOMA in a two-tier heterogeneous network (HetNet) with non-uniform small cell deployment, where critical performance metrics like coverage probability and achievable rate are analyzed. First, a NOMA-based HetNet model is established, where users are paired based on the proposed user pairing scheme. Then the distribution of the order statistics for the distances between different NOMA users and the serving base station (BS) is presented considering the channel qualities from the NOMA users to the BSs. On this basis, we analytically demonstrate the impact of various network parameters on the coverage probability and achievable rate of NOMA users, such as signal-to-interference-plus-noise ratio threshold and BS density. Furthermore, an analysis is presented to provide insight into the energy efficiency of the considered system. Finally, extensive simulation and comparisons are conducted, which validate the advantages of NOMA over OMA in the considered HetNet environment.
KW - achievable rate
KW - coverage probability
KW - heterogeneous network
KW - Non-orthogonal multiple access
UR - http://www.scopus.com/inward/record.url?scp=85048471168&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2018.2845440
DO - 10.1109/ACCESS.2018.2845440
M3 - Article
AN - SCOPUS:85048471168
VL - 6
SP - 31099
EP - 31109
JO - IEEE Access
JF - IEEE Access
SN - 2169-3536
M1 - 8375949
ER -
