论文标题
关于环境反向散射通信的中断性能
On the Outage Performance of Ambient Backscatter Communications
论文作者
论文摘要
环境反向散射通信（AMBACKCOMS）已被公认为是物联网的光谱和节能技术，因为它允许被动的反向散射设备（BDS）将其信息调节到遗产信号（例如蜂窝信号）中，并反映其相关的接收器，同时从遗产信号中收集能源来为电路运行提供电路运行。 {\ color {black}但是，在AMBACKCOMS的性能分析中，反向散射链接与遗产链接与能量收获者的非线性行为之间的共通道干扰在很大程度上被忽略了。借此两方面，本文为具有多个反向散射链接的Ambackcom系统提供了全面的停电性能分析}，其中一个反向散射链接是机会主义的，以利用给定资源块中传输的旧信号。对于任何选定的反向散射链路，我们提出了一个自适应反射系数（RC），该系数适用于非线性能量收集（EH）模型和选定的反向散射链路的位置，以最大程度地减少反向分散链路的中断概率。为了研究共渠道干扰对反向散射和遗留链接的影响，对于选定的反向散射链接，我们得出了传统链接和反向分散链接的中断概率。此外，我们研究了反向散射系统的最佳和最差的中断性能，其中所选的反向散射链路可在反向散射接收器处最大化或最大程度地减少信噪比差噪声比（SINR）。我们还研究了传统链接的最佳和最差的停电性能，其中所选的反向散射链接分别导致与传统接收器的最低和最高的共通道干扰。
Ambient backscatter communications (AmBackComs) have been recognized as a spectrum- and energy-efficient technology for Internet of Things, as it allows passive backscatter devices (BDs) to modulate their information into the legacy signals, e.g., cellular signals, and reflect them to their associated receivers while harvesting energy from the legacy signals to power their circuit operation. {\color{black} However, the co-channel interference between the backscatter link and the legacy link and the non-linear behavior of energy harvesters at the BDs have largely been ignored in the performance analysis of AmBackComs. Taking these two aspects, this paper provides a comprehensive outage performance analysis for an AmBackCom system with multiple backscatter links}, where one of the backscatter links is opportunistically selected to leverage the legacy signals transmitted in a given resource block. For any selected backscatter link, we propose an adaptive reflection coefficient (RC), which is adapted to the non-linear energy harvesting (EH) model and the location of the selected backscatter link, to minimize the outage probability of the backscatter link. In order to study the impact of co-channel interference on both backscatter and legacy links, for a selected backscatter link, we derive the outage probabilities for the legacy link and the backscatter link. Furthermore, we study the best and worst outage performances for the backscatter system where the selected backscatter link maximizes or minimizes the signal-to-interference-plus noise ratio (SINR) at the backscatter receiver. We also study the best and worst outage performances for the legacy link where the selected backscatter link results in the lowest and highest co-channel interference to the legacy receiver, respectively.
