基于无线射频识别技术的智能借还书系统设计  

Design of intelligent book borrowing and returning system based on RFID technology

作　　者：邱芬[1] QIU Fen(School Science and Technology,Nanchang University,Nanchang 330029,China)

机构地区：[1]南昌大学科学技术学院,江西南昌330029

出　　处：《现代电子技术》2021年第24期119-122,共4页Modern Electronics Technique

基　　金：江西省教育厅科学技术研究项目(GJJ151501);江西省教育厅科学技术研究项目(GJJ208713)

摘　　要：针对当前图书管理系统功耗大、无线信道资源利用率低的现状,文中对无线射频识别(RFID)中的标签防碰撞模型进行研究。考虑到现有的基于码分多址(CDMA)的碰撞模型会受到非正交导致的码间干扰影响问题,文中引入基于交织器的IDMA算法。该算法以IDMA作为区分标签的唯一方式,在同一时间内,可以在同一频率进行数据通信,有效地避免密集标签环境下无线信道的冲突概率。然后在该算法的基础上设计一套智能化的借还书系统,所设计系统功能完备,包括读者、管理员、RFID三个子系统。最后,对基于IDMA的防碰撞模型进行仿真。仿真结果表明,该方法在相同信噪比下的平均误码比特率明显优于CDMA算法,识别1000个射频标签所需要的时隙相较于CDMA算法降低了32.6%。In allusion to the current situation of high power consumption and low utilization of wireless channel resources in the existing library management system,the tag anti⁃collision model in radio frequency identification(RFID)is studied.In consideration of the problem that the existing collision model based on code division multiple access(CDMA)can be affected by the inter symbol interference caused by non orthogonal,the interleaver⁃based IDMA algorithm is introduced in this paper.As the only way to distinguish tags,IDMA algorithm can be used to communicate at the same frequency at the same time,which effectively avoids the conflict probability of wireless channel under the dense tag environment.An intelligent book borrowing and returning system is designed based on the IDMA algorithm,which has complete functions,including reader,administrator and RFID subsystems.Finally,the simulation experiment of the anti⁃collision model based on IDMA is conducted.The simulation results show that the average bit error rate of this algorithm is better than that of CDMA algorithm under the same signal to noise ratio,and the time slot required by this algorithm to identify 1000 RFID tags is reduced by 32.6%in comparison with CDMA algorithm.

关 键 词：借还书系统 无线射频识别 系统设计 图书管理 IDMA 电子标签 防碰撞模型 

分 类 号：TN915-34[电子电信—通信与信息系统] TP311[电子电信—信息与通信工程]