Nonorthogonal Random Access for 5G Mobile Communication Systems
- Title
- Nonorthogonal Random Access for 5G Mobile Communication Systems
- Author
- Hu Jin
- Keywords
- 5G mobile communications; uplink NOMA; random access; successive interference cancellation
- Issue Date
- 2018-08
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Citation
- IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v. 67, NO. 8, article no. 8336899, Page. 7867-7871
- Abstract
- This correspondence paper proposes two nonorthogonal random access (NORA) techniques for 5G mobile communication networks, where user equipments (UEs) make use of the channel inversion technique such that their received power at the base station (BS) can be one of the two target values. It enables the BS to decode two packets simultaneously with the successive interference cancelation (SIC) technique if a different power level is chosen. We propose two NORA systems; that is, UEs choose one of the two target power levels based on the channel gain or the region where they are. The performance of the proposed systems is analyzed in terms of access delay, throughput, and energy efficiency. Through analysis and extensive computer simulations, we show that the maximum throughput of the proposed NORA techniques can exceed 0.7, which is a significant improvement compared to the maximum throughput of conventional random access 0.368.
- URI
- https://ieeexplore.ieee.org/document/8336899/https://repository.hanyang.ac.kr/handle/20.500.11754/178627
- ISSN
- 0018-9545;1939-9359
- DOI
- 10.1109/TVT.2018.2825462
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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