可并行识别的超高频RFID系统防碰撞性能研究  

Study of anti-collision performance in parallelizable identification UHF RFID system

作　　者：王必胜[1,2] 张其善[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083 [2]山东科技大学信电学院,山东青岛266510

出　　处：《通信学报》2009年第6期108-113,共6页Journal on Communications

基　　金：广东省重大科技专项计划项目(2008A090300001)~~

摘　　要：对超高频射频识别(RFID)系统的防碰撞问题进行了分析。提出了基于动态帧时隙ALOHA(DFSA)协议与正交可变扩频因子码(OVSF)作为扩频码的码分多址技术相结合的超高频RFID系统,实现了在单一时隙内最多可并行识别m个RFID应答器,m为OVSF扩频码长度。对提出的RFID系统期望的系统吞吐量进行了理论分析,仿真结果表明其防碰撞性能显著超过了现有的基于动态帧时隙ALOHA(DFSA)协议的超高频RFID系统的防碰撞性能。The anti-collision problem of ultra high frequency （UHF） RFID system was analyzed. A novel UHF RFID system, which based on combination of dynamic framed-slotted ALOHA and CDMA technology with orthogoaal variable spread factor （OVSF） code, was presented. The RFID system had an ability to identify at most m tags simultaneously in one time slot, where m was the length of OVSF spread code. The expected system throughput of the presented RFID system was theoretically analyzed. The simulation results show that the anti-collision performance of the presented RFID system outperforms significantly that of current dynamic-framed-slotted-ALOHA （DFSA） UHF RFID system.

关 键 词：射频识别 可并行识别 OVSF码 动态帧时隙ALOHA(DFSA) 

分 类 号：TN929.532[电子电信—通信与信息系统]