摘要
为了在相同尺寸的SAW标签基础上扩大编码容量,拓宽SAW的应用范围,提出了一种基于最小二乘法的参数估计法,改进原有的脉冲位置编码方式。构造声表面波阅读器的信号模型,在起始反射栅时延参数估计算法的基础上,综合考虑单个标签的所有往返时延信息,引入误差向量和目标函数;利用最小二乘法优化目标函数,取消具有参考作用的起始反射栅,建立反射栅参数的数学模型。通过实例分别求得两种方法的时延,得出最小二乘法参数估计法比起始反射栅参数估计法具有更短的响应时间,最后利用蒙特卡洛方法对试验数据结果进行统计分析。结果表明该方法能够有效地提高SAW阅读器的识别速度,具有一定的推广应用价值。
In order to expand the capacity of the SAW tag based on the same size and expand the application range of SAW,a new method of parameter estimation based on least square method was proposed,which improved the original pulse position of encoding. Firstly the paper built the signal model of SAW-RFID reader,considered the all-round trip time delay of single tag comprehensively on the basis of the parameter estimation of first reflector. Then introduced the error vector and the objective function,adopted the least squares method for objective function optimization and cancelled the reference reflector to achieve a mathematic model of the reflector parameters. Through the example to contrast the two methods,the result shows that the time-delay of LS method is shorter than FR method. Finally,conducted the monte carlo simulation to confirm the effectiveness of the new parameter estimation method. The results show that the method can effectively improve the recognition rate of SAW reader,and has a certain application value.
出处
《轻工机械》
CAS
2016年第1期47-50,共4页
Light Industry Machinery
关键词
声表面波标签
脉冲位置编码
最小二乘法参数估计
蒙特卡洛仿真
SAW（surface acoustic wave） tags
pulse position coding
parameters estimation of the least squares
Monte Carlo simulation
作者简介
张二吻（1992），男，安徽宿州人，硕士研究生，主要研究方向为并联平台姿态定位与精度控制。E-mail：erwenzhang@163.com
