A Simple Multicarrier Transmission Technique Combining Transmit Diversity and Data Multiplexing for Non-Orthogonal Multiple Access
| Autor: | Gaojie Chen, Fei Ji, Ronglan Huang, Jie Li, Dehuan Wan, Miaowen Wen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Computer Networks and Communications
Frequency band Computer science Aerospace Engineering medicine.disease Interference (wave propagation) Multiplexing Noma Transmit diversity Signal-to-noise ratio Transmission (telecommunications) Single antenna interference cancellation Automotive Engineering Electronic engineering medicine Electrical and Electronic Engineering Computer Science::Information Theory |
| Zdroj: | IEEE Transactions on Vehicular Technology. 70:7216-7220 |
| ISSN: | 1939-9359 0018-9545 |
| DOI: | 10.1109/tvt.2021.3084325 |
| Popis: | Since the intra-group co-channel interference is introduced intentionally by the non-orthogonal multiple access (NOMA) technique, the reliability of NOMA based networks is limited by far users, while the sum-rate is mainly contributed by near users. In this paper, a NOMA based multiband scheduling policy is proposed to overcome this problem. Unlike conventional NOMA where all users are served in a single frequency band, the proposed scheme divides the entire band into multiple sub-bands, and accommodates the near and far users in different manners by exploring the sub-bands. Particularly, the far users employ repetition-based transmission in all sub-bands, and the maximum ratio combination (MRC) is integrated with successive interference cancellation (SIC) to jointly decode their intended symbols. Closed-form expression of the achievable sum-rate of the proposed scheme is derived, and the outage performance is characterized by the derived upper-bounded outage probability. Numerical results show that the proposed scheme enables NOMA systems to achieve both high reliability and high sum-rate. |
| Databáze: | OpenAIRE |
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