【作者】 杨彪；

【导师】 江建军；

【作者基本信息】 华中科技大学 ， 微电子学与固体电子学， 2006， 硕士

【摘要】 近年来,射频识别(RFID)技术在物流管理领域的应用日益受到关注,在巨大市场前景的诱惑下,IBM、英特尔、飞利浦、德州仪器等IT巨头纷纷对该领域进行大量投入。而我国电子标签技术正处在起步阶段,RFID产业发展比较落后,对RFID技术的研究,有利于摆脱国外企业的技术垄断、促进我国经济的进一步发展。但是由于硬件开发设计周期长、制作过程复杂、调试不方便、修改调整难,这已成为射频识别技术在我国进一步发展的制约因素,而软件开发速度较快、难度较低,可以在一定程度上缓解该矛盾。因此本文系统研究了一种用软件代替硬件,实现高频射频识别读写器功能的方法。以虚拟仪器技术为基础,运用多种数字信号处理技术,通过软件完成调制/解调、滤波、编码/解码、循环冗余校验、逻辑控制等射频识别读写器功能,并且开发了一套遵循ISO/IEC 18000-3标准Mode 1协议规范的射频识别虚拟仪器系统。测试表明,系统工作时占用带宽2MHz,脉冲上升时间为1.18us,下降时间为831.47ns,中心频率在250KHz到2.7GHz之间可调,占空比和调制精度均可任意设定,各项性能参数均达到了设计目标。结果证明,用软件代替硬件,实现射频识别读写器功能的方法是可行的。RFID技术将与人们的日常生活联系更加密切,人们需求的不断增大将推动技术的更加进步,而用软件取代某些专有硬件实现各种特定功能将日渐成为一种发展趋势。更多还原

【Abstract】 Attention was mainly paid to the application of the Radio Frequency Identification (RFID) technology in the field of the logistics management nowadays. Enticed by the huge market, many Multi-National Corporations have invested more capitals into this area, such as IBM, Intel, Philips, TI, and so on. The electronic tag technology in China is in a start-up stage and the development of RFID industry lags behind developed countries. Research on RFID would greatly help break away from the technology forestall of foreign corporations, and definitely accelerate the economic development. However, due to the long period for design, complicated procedure for manufacturing, inconvenience for debug and difficulty for correction, the lag of the hardware exploration has already restricted the further development of the RFID technology in China. Meanwhile, the development of the software design is much quicker and easier, which would well mitigate this conflict.Therefore, a method was systematically investigated in this paper, using software instead of hardware to realize the basic functions of the RFID reader. A RFID virtual instrument system following the ISO/IEC 18000-3 standard Mode 1 protocol was developed, employing some digital signal processing technologies. Functions of the RFID reader were completed by software, such as modulating/demodulating, filtering, encoding/decoding, cyclic redundancy check logic control, etc..The measurement results show that the capability parameters were achieved to fulfill the designation aim, with the bandwidth of 2 MHz, pulse rising time of 1.18 us, falling time of 831.47 ns, center frequency between 250 KHz and 2.7GHz and free duty ratio and modulation accuracy.It is demonstrated to be available when using software instead of hardware to realize the basic functions of a RFID reader. In the future, the RFID technology will be much closer to our daily life along with people’s sustained requirements, which would dramatically promote the progress of RFID technology. As a result, it will become a development trend to use software to take place of some distinctive hardware for the sake of carrying out some special functions.更多还原