Ambient backscatter: wireless communication out of thin air
Ambient backscatter: wireless communication out of thin air
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DOI：
10.1145/2486001.2486015
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发表时间：
2013-08
期刊：
影响因子：
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通讯作者：
Vincent Liu;Aaron N. Parks;Vamsi Talla;Shyamnath Gollakota;D. Wetherall;Joshua R. Smith
中科院分区：
文献类型：
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作者：
Vincent Liu;Aaron N. Parks;Vamsi Talla;Shyamnath Gollakota;D. Wetherall;Joshua R. Smith
我们介绍了通信系统的设计，该系统使两个设备能够使用环境RF作为唯一的权力来源进行通信。我们的方法利用了现有的电视和蜂窝传输来消除对电线和电池的需求，从而使无处不在的通信可以在空前的尺度和以前无法接近的位置进行通信。为了实现这一目标，我们介绍了环境反向散射，这是一种新的沟通原始的原始传播，设备通过反向散射的环境RF信号进行通信。我们的设计避免了产生无线电波的昂贵过程；反向散射沟通的数量级比传统无线电通信要高。此外，由于它利用了我们周围已经存在的环境RF信号，因此它不需要像传统的反向散射通信那样专用的功率基础架构。为了显示我们的设计的可行性，我们在硬件中原型环境反向散射设备进行了原型环境，并在2.5英尺和1.5英尺的距离内实现了1 kbps的信息速率，分别在户外和室内操作。我们使用硬件原型来实现两个以前无处不在的通信应用程序的概念验证。
We present the design of a communication system that enables two devices to communicate using ambient RF as the only source of power. Our approach leverages existing TV and cellular transmissions to eliminate the need for wires and batteries, thus enabling ubiquitous communication where devices can communicate among themselves at unprecedented scales and in locations that were previously inaccessible. To achieve this, we introduce ambient backscatter, a new communication primitive where devices communicate by backscattering ambient RF signals. Our design avoids the expensive process of generating radio waves; backscatter communication is orders of magnitude more power-efficient than traditional radio communication. Further, since it leverages the ambient RF signals that are already around us, it does not require a dedicated power infrastructure as in traditional backscatter communication. To show the feasibility of our design, we prototype ambient backscatter devices in hardware and achieve information rates of 1 kbps over distances of 2.5 feet and 1.5 feet, while operating outdoors and indoors respectively. We use our hardware prototype to implement proof-of-concepts for two previously infeasible ubiquitous communication applications.