@inproceedings{4af2e90c59da4406a0ed8e6eed2cf7bb,
title = "Downlink Power Allocation in SCMA with Finite-Alphabet Constraints",
abstract = "The power allocation for multi-user sparse code multiple access (SCMA) downlink systems with finite- alphabet constraints is investigated. An explicit expression for the achievable rate for downlink SCMA systems with finite-alphabet inputs is derived, which is applicable to arbitrary number of users. Moreover, a novel power allocation scheme that can ensure users' fairness for multi-user SCMA downlink systems is proposed. In an effort to solve the formulated non-convex optimization problem, a low- complexity polynomial algorithm is proposed, which yields an optimal solution. Simulation results demonstrate that the proposed power allocation algorithm is capable of enhancing the performance significantly compared to the equal power allocation scheme.",
author = "Jingjing Cui and Pingzhi Fan and Xianfu Lei and Zheng Ma and Zhiguo Ding",
note = "Funding Information: ACKNOWLEDGMENT The authors would like to thank the Huawei HIRP Flagship Project (No.YB201504), the National Science and Technology Major Project (No.2016ZX03001018-002) and the National Natural Science Foundation of China (No. 61501382). The authors would also like to thank the open research fund of National Mobile Communications Research Laboratory, Southeast University (No. 2017D15), Sichuan International Science \& Technology Cooperation and Exchange Project (2017HH0035), Fundamental Research Funds for the Central Universities (No. 2682015RC20 \& 2682016CY22). Publisher Copyright: {\textcopyright} 2017 IEEE.; 85th IEEE Vehicular Technology Conference, VTC Spring 2017 ; Conference date: 04-06-2017 Through 07-06-2017",
year = "2017",
month = nov,
day = "14",
doi = "10.1109/VTCSpring.2017.8108679",
language = "British English",
series = "IEEE Vehicular Technology Conference",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2017 IEEE 85th Vehicular Technology Conference, VTC Spring 2017 - Proceedings",
address = "United States",
}