Capacity of Backscatter Communication Systems With Tag Selection
Capacity of Backscatter Communication Systems With Tag Selection
复制标题
带标签选择的反向散射通信系统的容量
DOI：
10.1109/tvt.2019.2936648
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发表时间：
2019-10-01
影响因子：
6.8
通讯作者：
Hu, Fengye
中科院分区：
文献类型：
--
作者：
Li, Dong;Peng, Wei;Hu, Fengye
在后向散射通信（BackCom）系统中，系统性能易受双衰落信道的影响。在本文中，我们研究了BackCom系统的容量性能，通过多个标签，其中的标签对应的最大信噪比（SNR）被选择来对抗双衰落。虽然确切的遍历容量不承认一个封闭的形式的表达，我们推导出它的近似利用极值理论，这表明容量的规模为<inline-formula><tex-math notation="LaTeX">$\log \log N$</tex-math></inline-formula>与<inline-formula><tex-math notation="LaTeX">$N$</tex-math></inline-formula>表示的标签的数量。仿真结果验证了近似遍历容量的严密性和容量标度律的正确性。
In backscatter communication (BackCom) systems, the system performance is susceptible to the double fading channels. In this paper, we investigate the capacity performance of BackCom systems via multiple tags, where the tag corresponding to the maximum signal-to-noise ratio (SNR) is selected to combat the double fading. Although the exact ergodic capacity does not admit a closed-form expression, we derive its approximation by exploiting the extreme value theory, which shows that the capacity scales as <inline-formula><tex-math notation="LaTeX">$\log \log N$</tex-math></inline-formula> with <inline-formula><tex-math notation="LaTeX">$N$</tex-math></inline-formula> denoting the number of tags. Simulation results confirm the tightness of the approximate ergodic capacity, and the correctness of the capacity scaling law.