声表面波技术在啁啾扩频超宽带射频识别中的应用(英文)  

Application of SAW Technology in Chirp Spread Spectrum Ultra-wideband RFID System

作　　者：周金[1] 赵启大[1] 

机构地区：[1]南开大学现代光学研究所,天津300071

出　　处：《南开大学学报（自然科学版）》2011年第2期6-11,共6页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：Supported by State Natural Sciences Foundation(60572018);Tianjin Development Plan of Key Science and Technology Program(05YFGPGX04900);Tianjin Key Projects in the National Science and Technology Pillar Program(07ZCKFGX00200)

摘　　要：提出一种新的基于啁啾扩频超宽带技术的声表面波射频识别标签模型,该标签利用了伪随机序列进行编码,并使用了抽样函数作为扩频波形.标签参数符合超宽带无线通信标准,其带宽大于等于500 MHz.该系统具有时延小及发射功率低的优点.此外,提出了多址标签编码方式,取代了中心频率为2.45 GHz、带宽等于82.5 MHz声表面波标签通常使用的通/断编码方式.最后给出了仿真结果.To be relatively new technologies for surface acoustic wave radio frequency identification（SAW RFID）and Ultra-Wideband（UWB）,a novel SAW RFID tag based on UWB chirp spread spectrum（CSS）theory making use of PN codes and Sac spreading specturm waveform was proposed.The tag designation is well in accordance with FCC standards of UWB wireless communications,with its bandwidth larger than 500 MHz. The combination of UWB in SAW RFID has the advantage of short delay due to large bandwidth as well as low energy required for the reader.Moreover,the encoding and detection for UWB SAW tag,which replaced the universally used pulse position and on/off encoding methods in SAW tags with its central frequency of 2.45 GHz and bandwidth of 82.5 MHz,offers an effective way for multi-access SAW RFID tag system.Implementation of UWB CSS SAW RFID tag was demonstrated and corresponding simulation results were given.

关 键 词：射频识别 声表面波 啁啾扩频 超宽带 

分 类 号：TN929.5[电子电信—通信与信息系统]