Wi-Fi干扰下RFID谐波信号的检测与恢复

Chao Gong;Ping Li;Panlong Yang;Zhao Lv
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引用次数: 0

摘要

在物联网(IoT)领域,射频识别(RFID)技术对于将物理对象连接到数字数据至关重要。谐波技术的引入通过提高灵敏度和实现无线保真(Wi-Fi)网络的通信,扩大了RFID的应用范围。然而,这一趋势面临着挑战,特别是来自强Wi-Fi信号的干扰,这会影响基于rfid的传感系统。本文提出WiFID (Wi-Fi和RFID)算法,使Wi-Fi设备能够感知RFID微弱谐波信号。自适应子载波分配最小化地降低Wi-Fi吞吐量,同时有效地限制RFID谐波传感的干扰。在通用软件无线电外设(USRP)平台上的实验验证表明,WiFID成功地检测到−30 dBm下90%的RFID谐波,而Wi-Fi吞吐量仅降低了4%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Detection and Recovery of RFID Harmonic Signal for Wi-Fi Interference
In the realm of the Internet of things (IoT), radio frequency identification (RFID) technology is essential for linking physical objects to digital data. The introduction of harmonic technology has expanded RFID's applications by improving sensitivity and enabling communication with wireless fidelity (Wi-Fi) networks. However, this trend faces challenges, notably interference from strong Wi-Fi signals, which impacts RFID-based sensing systems. This paper proposes the WiFID (Wi-Fi and RFID) algorithm, which enables Wi-Fi devices to sense weak RFID harmonic signals. Adaptive subcarrier deallocation minimally reduces Wi-Fi throughput while effectively limiting interference with RFID harmonic sensing. Experimental validation on the universal software radio peripheral (USRP) platform demonstrates that WiFID successfully detects 90% of RFID harmonics at −30 dBm, with only a minimal 4% decrease in Wi-Fi throughput.
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