A Novel Microwave Architecture for Passive Sensing Applications
A Novel Microwave Architecture for Passive Sensing Applications
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DOI：
10.1109/rws53089.2022.9719929
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发表时间：
2022-01
期刊：
影响因子：
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通讯作者：
Davi V. Q. Rodrigues;Dongyang Tang;Changzhi Li
中科院分区：
文献类型：
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作者：
Davi V. Q. Rodrigues;Dongyang Tang;Changzhi Li
射频信号在无源室内应用中的使用在过去几年中获得了极大的兴趣。通过利用无处不在的Wi-Fi信号，可以在分析与接收信号强度（RSS）、信道状态信息（CSI）或与无源Wi-Fi雷达（PWR）技术相关联的测量之后检索目标的多普勒信息。然而，基于RSS和CSI的策略需要高计算成本的数字信号处理和/或对Wi-Fi接入点的特殊修改，而基于PWR的方法依赖于参考信道和干扰去除算法来提供多普勒信息。在这项工作中，提出了一种新的微波架构的无源传感应用。通过利用反射的RF信号和来自非合作发射机的直接信号，所提出的架构可以提供运动目标的多普勒信息。实验结果证实了该方案的有效性的小幅度运动的远程检测。
The use of radio-frequency signals for passive indoor applications has gained significant interest over the last years. By leveraging ubiquitous Wi-Fi signals, the Doppler information of a target can be retrieved after the analysis of measurements associated with the received signal strength (RSS), the channel state information (CSI), or with passive Wi-Fi radar (PWR) techniques. However, RSS and CSI-based strategies require digital signal processing of high computational cost and/or special modifications to the Wi-Fi access point, while PWR-based approaches rely on a reference channel and interference removal algorithms to provide Doppler information. In this work, a novel microwave architecture for passive sensing applications is proposed. By taking advantage of the reflected RF signals and the direct signals from a non-cooperative transmitter, the proposed architecture can provide the Doppler information of a moving target. Experimental results confirm the effectiveness of the proposed scheme for the remote detection of small amplitude motion.