Research Article
Improved Proportional Fair Scheduling Mechanism with Joint Gray-Mapping Modulation for NOMA
@INPROCEEDINGS{10.1007/978-3-319-66625-9_35, author={Jing Guo and Xuehong Lin and Zhisong Bie}, title={Improved Proportional Fair Scheduling Mechanism with Joint Gray-Mapping Modulation for NOMA}, proceedings={Communications and Networking. 11th EAI International Conference, ChinaCom 2016, Chongqing, China, September 24-26, 2016, Proceedings, Part I}, proceedings_a={CHINACOM}, year={2017}, month={10}, keywords={Non-orthogonal multiple access Proportional fair Power allocation Successive interference cancellation}, doi={10.1007/978-3-319-66625-9_35} }- Jing Guo
Xuehong Lin
Zhisong Bie
Year: 2017
Improved Proportional Fair Scheduling Mechanism with Joint Gray-Mapping Modulation for NOMA
CHINACOM
Springer
DOI: 10.1007/978-3-319-66625-9_35
Abstract
Non-orthogonal multiple access (NOMA) is a promising technique with high spectral efficiency to meet requirements for 5G. This paper mainly introduces key algorithms of NOMA with successive interference cancellation (SIC). Far-UEs and Near-UEs are co-scheduled as a group on the same resource block with different power allocation. To seek a good trade-off between computational complexity and system capacity, an improved method of proportional fair (PF) scheduling with joint Gray-mapping modulation is proposed. The results show that NOMA with SIC significantly enhances the system performance and spectral efficiency compared to conventional orthogonal multiple access (OMA), bringing 22.59% and 21.26% gain in cell average and cell edge throughput respectively. And using the Gray-mapped composite constellation and reducing signalling overhead with the improved pre-fixed power allocation method, which is promote to practical use, brings negligible performance loss.
