Spectral efficient designs of MIMO-based CR-NOMA for Internet of Things Networks,International Journal of Communication Systems

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Spectral efficient designs of MIMO-based CR-NOMA for Internet of Things Networks
International Journal of Communication Systems ( IF 1.7 ) Pub Date : 2021-06-03 , DOI: 10.1002/dac.4888
Prabhat Thakur ₁ , Ghanshyam Singh ₁

Affiliation

Due to rapid increase in the wireless-connected Internet-of-things (IoT) devices, the communication among devices is a critical task as it relies on the radio-frequency spectrum, which is a limited resource. Therefore, additional spectral efficient communication designs are required for future IoT networks. By keeping this in mind, we have exploited individually spectral efficient technologies such as the cognitive radio (CR), non-orthogonal multiple access (NOMA), and multiple-input multiple-output (MIMO) simultaneously that is MIMO-based CR-NOMA (MIMO-CR-NOMA) and have proposed as well as analyzed a potential framework for its downlink scenario. The closed-form expressions for the throughput at each user due to the number of transmitting and receiving antennas are derived numerically. Further, we have derived mathematical expressions for the sum throughput of different frameworks such as CR-NOMA, CR-MIMO, and MIMO-CR-NOMA systems. Moreover, the proposed frameworks are simulated, and the relationship between two NOMA users each with multiple antennas is illustrated with simulation results.

中文翻译：

用于物联网的基于 MIMO 的 CR-NOMA 的频谱高效设计

由于无线连接物联网 (IoT) 设备的迅速增加，设备之间的通信是一项关键任务，因为它依赖于有限资源的无线电频谱。因此，未来的物联网网络需要额外的频谱高效通信设计。牢记这一点，我们同时开发了单独的频谱高效技术，例如认知无线电 (CR)、非正交多址 (NOMA) 和多输入多输出 (MIMO)，即基于 MIMO 的 CR-NOMA (MIMO-CR-NOMA) 并提出并分析了其下行链路场景的潜在框架。由于发射和接收天线的数量，每个用户的吞吐量的闭式表达式是从数值上推导出来的。更多，我们推导出了不同框架（如 CR-NOMA、CR-MIMO 和 MIMO-CR-NOMA 系统）的总吞吐量的数学表达式。此外，对所提出的框架进行了仿真，并通过仿真结果说明了每个具有多个天线的两个 NOMA 用户之间的关系。

更新日期：2021-07-06

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