摘要
在RFID系统中,当多个标签同时处在阅读器的读写范围内时,如果没有相应的防冲突机制,会导致标签到阅读器的通信冲突,使得从标签返回的数据难以被阅读器正确识别.防冲突算法是阅读器快速、正确获取标签数据的关键.详细论述了射频识别技术中的关键问题:防碰撞技术,提出了一种基于二进制防碰撞算法的改进树形算法。在介绍Manchester编码原理的基础上,对该改进算法的命令、原理进行了较为系统的论述,经验证该算法提高了阅读器辨认标签的速度,辨认准确性也大大提高,在电子标签数量较大的情况下比传统的二进制及动态二进制防碰撞算法优势更加明显。
In the RFID system,tag-to-reader communication collision occurs when more than one tag responds to a reader s interrogation at the same time.Without any coordination among the reader and the tags,the responses from the tags will become illegible to the reader。This article introduced the anti—collision algorithm in radio frequency identification system and brought forward a new binary-tree algorithm.The command and principle of this new binary-tree algorithm is analyzed in detail based on the coding of Manchester.It is verified that this new algorithm could identify all tags rapidly.So this algorithm has more obvious advantages than the binary search algorithm and the dynamic binary search algorithm in the more tags.
出处
《电子技术（上海）》
2008年第12期68-70,共3页
Electronic Technology
关键词
射频识别
防碰撞算法
二进制算法
标签识别
Radio Frequency Identification
anti-collision algorithm
binary algorithm
tag identification
