Research Article
Bidirectional Backscatter NOMA Schemefor Efficient CDRT Systems
@INPROCEEDINGS{10.1007/978-3-031-86196-3_18, author={Rongfei Hu and Yao Xu and Jianyue Zhu and Jichong Guo and Shaobo Jia and Yi Lou and Chengzhao Shan}, title={Bidirectional Backscatter NOMA Schemefor Efficient CDRT Systems}, proceedings={Wireless and Satellite Systems. 14th EAI International Conference, WiSATS 2024, Harbin, China, August 23--25, 2024, Proceedings, Part I}, proceedings_a={WISATS}, year={2025}, month={3}, keywords={Non-orthogonal multiple access Coordinated direct and relay transmission Backscatter communication Ergodic sum capacity}, doi={10.1007/978-3-031-86196-3_18} }- Rongfei Hu
Yao Xu
Jianyue Zhu
Jichong Guo
Shaobo Jia
Yi Lou
Chengzhao Shan
Year: 2025
Bidirectional Backscatter NOMA Schemefor Efficient CDRT Systems
WISATS
Springer
DOI: 10.1007/978-3-031-86196-3_18
Abstract
Non-orthogonal multiple access (NOMA) based coordinated direct and relay transmission (CDRT) is recognized as one of the enabling technologies for effectively enhancing spectral efficiency and coverage range in mobile communication systems. However, most conventional NOMA based CDRT schemes only support cellular data transmission. To simultaneously support both cellular and Internet of Things (IoT) data transmission and further improve the spectral efficiency of the system, this paper proposes a novel bidirectional backscatter NOMA scheme for CDRT systems. Specifically, the proposed scheme utilizes both uplink NOMA and downlink NOMA to facilitate the sharing of spectrum and time resources between cellular information and IoT data reflected by users. To accurately characterize the effectiveness of the proposed scheme, the closed-form expressions for the ergodic sum capacity (ESC) are derived. Simulation experiments validate the correctness of theoretical analysis and demonstrate that the proposed scheme can achieve better ESC performance than the conventional NOMA based CDRT and orthogonal multiple access.
