A Novel Microwave Architecture for Passive Sensing Applications

Davi V. Q. Rodrigues, Dongyang Tang, Changzhi Li
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引用次数: 4

Abstract

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.
一种用于被动传感的新型微波结构
在过去几年中,射频信号在无源室内应用中的应用获得了极大的兴趣。通过利用无处不在的Wi-Fi信号,可以在与接收信号强度(RSS)、信道状态信息(CSI)或无源Wi-Fi雷达(PWR)技术相关的测量分析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接入点进行特殊修改,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,提出了一种用于被动传感应用的新型微波结构。利用非合作发射机反射的射频信号和直接信号,可以提供运动目标的多普勒信息。实验结果验证了该方法对小幅度运动的远程检测的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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