TY - JOUR
T1 - Next-Generation Multiple Access Based on NOMA with Power Level Modulation
AU - Pei, Xinyue
AU - Chen, Yingyang
AU - Wen, Miaowen
AU - Yu, Hua
AU - Panayirci, Erdal
AU - Poor, H. Vincent
N1 - Funding Information:
This work was supported in part by the National Natural Science Foundation of China under Grants U1809211, 61871190, and 62001191; in part by the Natural Science Foundation of Guangdong Province under Grants 2018B030306005 and 2021B1515120067; in part by the Guangdong Provincial Key Laboratory of Short-Range Wireless Detection and Communication, under Grant 2017B030314003; and in part by the Fundamental Research Funds for the Central Universities under Grant 21620351.
Publisher Copyright:
© 1983-2012 IEEE.
PY - 2022/4/1
Y1 - 2022/4/1
N2 - To cope with the explosive traffic growth expected in next-generation wireless networks, it is necessary to design next-generation multiple access techniques that can provide higher spectral efficiency as well as larger-scale connectivity. As a promising candidate, power-domain non-orthogonal multiple access (NOMA) has been widely studied. In conventional power-domain NOMA, multiple users are multiplexed in the same time and frequency band with different preset power levels, which, however, may limit the spectral efficiency under practical finite alphabet inputs. Inspired by the concept of spatial modulation, we propose to solve this problem by encoding extra information bits into the power levels, and exploiting different signal constellations to help the receiver distinguish between them. To convey this idea, termed power selection (PS)-NOMA, clearly, we consider a simple downlink two-user NOMA system with finite input constellations. Assuming maximum-likelihood detection, we derive closed-form approximate bit error rate (BER) expressions for both users. Moreover, the two-user achievable rate region is also characterized. Simulation results verify the analysis and show that the proposed PS-NOMA can outperform conventional NOMA in terms of BER and achievable rate.
AB - To cope with the explosive traffic growth expected in next-generation wireless networks, it is necessary to design next-generation multiple access techniques that can provide higher spectral efficiency as well as larger-scale connectivity. As a promising candidate, power-domain non-orthogonal multiple access (NOMA) has been widely studied. In conventional power-domain NOMA, multiple users are multiplexed in the same time and frequency band with different preset power levels, which, however, may limit the spectral efficiency under practical finite alphabet inputs. Inspired by the concept of spatial modulation, we propose to solve this problem by encoding extra information bits into the power levels, and exploiting different signal constellations to help the receiver distinguish between them. To convey this idea, termed power selection (PS)-NOMA, clearly, we consider a simple downlink two-user NOMA system with finite input constellations. Assuming maximum-likelihood detection, we derive closed-form approximate bit error rate (BER) expressions for both users. Moreover, the two-user achievable rate region is also characterized. Simulation results verify the analysis and show that the proposed PS-NOMA can outperform conventional NOMA in terms of BER and achievable rate.
KW - Bit error rate
KW - achievable rate
KW - finite alphabet input
KW - next-generation multiple access (NGMA)
KW - non-orthogonal multiple access (NOMA)
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U2 - 10.1109/JSAC.2022.3143240
DO - 10.1109/JSAC.2022.3143240
M3 - Article
AN - SCOPUS:85123298447
SN - 0733-8716
VL - 40
SP - 1072
EP - 1083
JO - IEEE Journal on Selected Areas in Communications
JF - IEEE Journal on Selected Areas in Communications
IS - 4
ER -