论文标题
支持雷达的环境反向散射通信
Radar-enabled ambient backscatter communications
论文作者
论文摘要
在这项工作中，我们利用雷达混乱（即，响应于雷达发射机发出的信号而产生的地形和/或周围物体产生的回声集合）作为载体信号，以使环境反向散射从源（源（TAG））到达目的地（reader）。拟议的想法依赖于以下事实：由于雷达激发是周期性的，因此雷达混乱本身是随时间缩放的周期性比环境的连贯性时间短。得出方便的信号模型后，我们提出了两个编码/解码方案，这些方案不需要与雷达发射器或雷达波形的知识进行任何协调。在更改驱动标签开关或采用的编码规则的控制信号时，可以在传输率和错误概率方面进行不同的权衡；同样，可以使用来源或未提供的多重访问策略来容纳多个标签。提供了一些说明性的例子。
In this work, we exploit the radar clutter (i.e., the ensemble of echoes generated by the terrain and/or the surrounding objects in response to the signal emitted by a radar transmitter) as a carrier signal to enable an ambient backscatter communication from a source (tag) to a destination (reader). The proposed idea relies on the fact that, since the radar excitation is periodic, the radar clutter is itself periodic over time scales shorter than the coherence time of the environment. Upon deriving a convenient signal model, we propose two encoding/decoding schemes that do not require any coordination with the radar transmitter or knowledge of the radar waveform. Different tradeoffs in terms of transmission rate and error probability can be obtained upon changing the control signal driving the tag switch or the adopted encoding rule; also, multiple tags can be accommodated with either a sourced or an unsourced multiple access strategy. Some illustrative examples are provided.
