Journal on Communications ›› 2021, Vol. 42 ›› Issue (4): 76-88.doi: 10.11959/j.issn.1000-436x.2021099

• Topics: Strategic Technologies to Massive Connecting for the Future Mobile Networks • Previous Articles     Next Articles

Joint time and beam domain non-orthogonal multiple access

Zhaoyang ZHANG, Jiajia WU, Jue WANG, Chu ZHOU   

  1. College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China
  • Revised:2021-03-09 Online:2021-04-25 Published:2021-04-01
  • Supported by:
    The National Natural Science Foundation of China(61725104);The National Natural Science Foundation of China(U20A20158);The National Key Research and Development Program of China(2020YFB1807101);The National Key Research and Development Program of China(2018YFB1801104)

Abstract:

In order to improve the system’s ability to accommodate connected devices, a joint time and beam domain non-orthogonal multiple access (NOMA) scheme was proposed, which was suitable for millimeter wave massive multiple-input multiple-output (MIMO) systems.The correlation and difference of the users’ channel were utilized to realize beam-domain NOMA, and sparse spreading technology was utilized to realize time-domain NOMA.With the optimization goal of improving the communication reliability of the system, optimization problem of the joint domain sparse access matrix design was constructed and solved.Finally, the access matrix was reconstructed based on the channel quality of the joint domain, and the interference cancellation operation was added to the message passing algorithm (MPA), which reduced the decoding complexity and improves the communication reliability.

Key words: millimeter wave, NOMA, beam domain, reliability

CLC Number: 

No Suggested Reading articles found!