Advantages of NOMA for Multi-User BackCom Networks
Advantages of NOMA for Multi-User BackCom Networks
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DOI：
10.1109/lcomm.2021.3100337
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发表时间：
2021-05
期刊：
影响因子：
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通讯作者：
Fellow Ieee Zhiguo Ding;L. F. I. H. Vincent Poor
中科院分区：
文献类型：
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作者：
Fellow Ieee Zhiguo Ding;L. F. I. H. Vincent Poor
环境后向散射通信（BackCom）面临着单个BackCom设备可能无意中占用多个正交资源块的挑战。因此，为了避免同信道干扰，传统的方法是在不同的时隙中服务多个BackCom设备，这降低了频谱效率和连接性。这封信表明，使用非正交多址接入（NOMA）可以有效地提高系统的吞吐量和支持大规模连接环境BackCom网络。特别是，两个收发器的设计方法中开发的信中实现不同的系统性能和复杂性之间的权衡。
Ambient backscatter communication (BackCom) is faced with the challenge that a single BackCom device can occupy multiple orthogonal resource blocks unintentionally. As a result, in order to avoid co-channel interference, a conventional approach is to serve multiple BackCom devices in different time slots, which reduces both spectral efficiency and connectivity. This letter demonstrates that the use of non-orthogonal multiple access (NOMA) can efficiently improve the system throughput and support massive connectivity in ambient BackCom networks. In particular, two transceiver design approaches are developed in the letter to realize different tradeoffs between system performance and complexity.