期刊
IEEE ACCESS
卷 5, 期 -, 页码 7667-7681出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2017.2673248
关键词
Non-orthogonal multiple access (NOMA); millimeter wave (mmWave) networks; mmWave-NOMA communications; random beamforming
资金
- UK Engineering and Physical Science Research Council [EP/L025272/1]
- European Commission [690750]
- Huawei HIRP Flagship Project [YB201504]
- Chinese National Science and Technology Major Project [2016ZX03001018-002]
- Chinese 111 Project [111-2-14]
- U.S. National Science Foundation [CCF-1420575, CNS-1456793]
- EPSRC [EP/L025272/1] Funding Source: UKRI
This paper investigates the coexistence between two key enabling technologies for fifth generation (5G) mobile networks, non-orthogonal multiple access (NOMA), and millimeter-wave (mmWave) communications. Particularly, the application of random beamforming to mmWave-NOMA systems is considered in order to avoid the requirement that the base station know all the users' channel state information. Stochastic geometry is used to characterize the performance of the proposed mmWave-NOMA transmission scheme by using key features of mmWave systems, i.e., that mmWave transmission is highly directional and potential blockages will thin the user distribution. Two random beamforming approaches that can further reduce the system overhead are also proposed, and their performance is studied analytically in terms of sum rates and outage probabilities. Simulation results are also provided to demonstrate the performance of the proposed schemes and verify the accuracy of the developed analytical results.
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