Xu, Tianheng; Xu, Yinjun; Zhou, Ting; Chen, Xianfu; Hu, Honglin

CHINA COMMUNICATIONS

2023, 20,

Xu, Tianheng; Xu, Yinjun; Zhou, Ting; Chen, Xianfu; Hu, Honglin

With the continuous development of wire-less communication technology, the number of access devices continues to soar, which poses a grate chal-lenge to the already scarce spectrum resources. Mean-while, 6G will be an era of air-space-terrestrial-sea integration, and satellite spectrum resources are also very tight in the context of giant constellations. In this paper, we propose a Non-Orthogonal Multiple Access (NOMA) based spectrum sensing scheme for the fu-ture satellite-terrestrial communication scenarios, and design the transceiver from uplink and downlink sce-narios, respectively. In order to better identify the user's transmission status, we obtain the feature val-ues of each user through feature detection to make decision. We combine these two technologies to de-sign the transceiver architecture and deduce the thresh-old value of feature detection in the satellite-terrestrial communication scenario. Simulations are performed in each scenario, and the results illustrate that the pro-posed scheme combining NOMA and spectrum sens-ing can greatly improve the throughput with a similar detection probability as Orthogonal Multiple Access (OMA).