The bistatic backscatter architecture, with its extended range, enables flexible deployment opportunities for backscatter devices. In this paper, we study the placement of power beacons (PBs) in bistatic backscatter networks to maximize the guaranteed coverage distance (GCD), defined as the distance from the reader within which backscatter devices are able to satisfy a given quality-of-service constraint. This work departs from conventional energy source placement problems by considering the performance of the additional backscatter link on top of the energy transfer link. We adopt and optimize a symmetric PB placement scheme to maximize the GCD. The optimal PB placement under this scheme is obtained using either analytically tractable expressions or an efficient algorithm. Numerical results provide useful insights into the impacts of various system parameters on the PB placement and the resulting GCD, plus the advantages of the adopted symmetric placement scheme over other benchmark schemes.

中文翻译：

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功率信标放置可最大限度地保证双基地反向散射网络的覆盖范围


双基地反向散射架构具有扩展的范围，为反向散射设备提供了灵活的部署机会。在本文中，我们研究了双基地反向散射网络中功率信标 (PB) 的放置，以最大限度地提高保证覆盖距离 (GCD)，保证覆盖距离定义为反向散射设备能够满足给定服务质量时距阅读器的距离约束。这项工作通过考虑能量传输链路顶部的附加反向散射链路的性能，偏离了传统的能源放置问题。我们采用并优化对称PB放置方案来最大化GCD。该方案下的最佳 PB 放置是使用易于分析的表达式或有效的算法获得的。数值结果提供了关于各种系统参数对 PB 布局和由此产生的 GCD 的影响的有用见解，以及所采用的对称布局方案相对于其他基准方案的优势。