一种多天线阅读器定位系统

摘要

The performance of RFID based positioning systems was analyzed, and aiming at their deficiency in positioning accuracy, efficiency, reliability, cost etc., a new positioning system using multiple antenna readers was proposed.The new positioning system uses multiple antenna readers to expand one single reader''s location coverage, and realizes the accurate positioning of target tags by using the received signal strength of antennas.The multiple antenna readers can avoid the signal blind area caused by the shadow effect by selecting the transmitting antenna flexibly.Compared with the single antenna reader positioning system, the positioning system using multiple antenna readers has the outstanding advantages in positioning speed, accuracy and anti-interference property.%分析了基于射频识别(RFID)的定位系统的性能,针对现有的RFID定位系统在定位精度、效率、可靠性、成本等方面的不足,提出了一种采用多天线阅读器的定位系统.该系统利用多天线阅读器可扩大单个阅读器定位的覆盖范围,并可根据各接收天线检测的信号强度等信息实现对目标标签的精确定位.通过灵活选择发射天线,可以避免由于阴影效应而带来的信号盲区现象.和传统的单天线阅读器定位方法相比,多天线阵列阅读器定位系统在定位速度、定位精度和抗干扰性上都具有突出的优势.