摘要
在射频识别系统中,标签数目的精确估算对于动态帧时隙ALOHA反碰撞算法起着关键的作用。基于与已往只能使用查表法和曲线拟合法不同,通过理论推导直接给出了碰撞因子与空闲、成功和碰撞时隙概率之间的数学表达式,给出了一种基于碰撞因子的标签估算方法。该方法计算简单,避免了硬件成本和拟合误差方面的缺点。MATLAB仿真证明,该方法对标签估算准确度以及标签识别速度有较大提高。
In RFID systems,the estimating tags quantity is the key of dynamic framed slotted ALOHA algorithm.Unlike the table lookup and curve-fitting method,this paper directly gave a mathematical expression through theoretical calculation,which described the relation between the collision factor and the quantities of idle,success,collision slots.It proposed a tag quantity estimation using a collision factor based on the expression.This method is simple and don＇t have the hardware cost or fitting error.Simulation indicates that the proposed method improves the accuracy of tags estimation and the speed of tag identification.
出处
《计算机应用研究》
CSCD
北大核心
2011年第11期4131-4133,共3页
Application Research of Computers
关键词
反碰撞
无线射频识别技术
碰撞因子
标签估算
ALOHA算法
anti-collision
radio frequency identification（RFID）
collision factor
tags quantity estimation
ALOHA algorithm
