摘要
RFID定位技术通过射频信号实现目标的识别与位置确定,是近年来兴起的热门技术之一;然而,针对战地医院等电子干扰大、物理环境复杂、多径衰落明显的应用场合,其性能将受到显著影响;文章就此设计了一种利用扩频技术进行信息传输的RFID实时定位系统,利用伪随机码进行标签信息调制,可有效增强系统的抗多径、抗干扰能力;给出了基于扩频编码的RFID实时定位系统整体设计,研究了标签设计与捕获算法两个技术关键点;理论分析表明,系统抗多径能力显著增强,且定位误差可达2.384m。
The RFID localization is an emerging technology which performs the identification and localization with the radio frequency sig nal. However, its performance will be prominently affected when deploying in the occasions with complicated physical conditions, strong c lectronic interference, and obvious multipath fading, such as field ambulance. Aiming at solving this problem, the spread spectrum technolo gy is introduced into RFID location system with the purpose of improving capacity of resisting disturbance and interference. The system archi tecture, tag design and capturing algorithm are discussed in this paper. The theoretical analysis gives out the result that tolerance of the mul tipath interference of the localization system is obviously improved, with the location error around 2. 384 meters.
出处
《计算机测量与控制》
北大核心
2013年第1期192-194,共3页
Computer Measurement &Control
基金
国家科技支撑项目(2011BAH05)
关键词
RFID
扩频技术
定位
多径干扰
RFID
spread spectrum technology~ location~ muhipath
