基于CDMA技术的新型防碰撞算法  

Novel CDMA-based anti-collision algorithm

作　　者：彭琦[1] 庞宇[1] 

机构地区：[1]重庆邮电大学,重庆400065

出　　处：《数字通信》2014年第2期42-44,72,共4页Digital Communications and Networks

基　　金：国家自然科学基金(61102075);重庆自然科学基金(CSTC2011BB2142)

摘　　要：标签碰撞是射频识别(RFID)技术的常见问题,该问题影响了RFID系统通信过程中数据传输的完整性。在分析已有防碰撞方法的基础上,根据帧时隙分组ALOHA算法,结合码分多址技术,提出了新型的标签防碰撞算法。该算法能够有效减小标签之间的碰撞概率,缩短读写器操作时间,提高吞吐率,很适合应用于具有较大数量标签的RFID系统中。Tag collision is the common problem in radio frequency identification technology, which affects the integrity of the data transmission in the RFID system. By the analysis of the existing anti-collision method, this paper relies on the slot frame group ALOHA technique and presents a new tag anti-collision algorithm combining with the code division multiple ac- cess technology. This algorithm can effectively reduce the collision probability between tags, shorten the time of reading and writing operations, and improve throughput, which is suitable for a number of tags in the RFID system.

关 键 词：射频识别 防碰撞 ALOHA算法 码分多址 

分 类 号：TN929.533[电子电信—通信与信息系统]