一种低信噪比下的RFID信号解调方法  

A Method on Demodulation of RFID Signals at Low SNR

作　　者：张焱[1] 张芳[1] 熊刚[1] 

机构地区：[1]中国电子科技集团第三十研究所,四川成都610041

出　　处：《通信技术》2014年第6期600-603,共4页Communications Technology

摘　　要：针对实际环境中RFID信号微弱且易受干扰的情况,提出了一种低信噪比条件下的解调方法,对以前的方法进行了改进,采取了基于自适应拟合的降噪除干扰算法,并设计了一种新的同步结构。通过理论分析和计算机仿真结果表明,该方法能在较低的信噪比容限下,正确地解调出RFID信号,性能优于原有方法,可为低信噪比条件下RFID的信号处理以及远距离RFID技术的应用提供更有效的解决途径。Aiming at the problem of RFID signals being very weak and easily disturbed in actual environment, the paper proposes a new method on demodulation at low SNR. The new method could improve the traditional one based on adaptive noise-reduction, and help design a new synchronization structure. The theoretical analysis and computer simulations show that the proposed algorithm could be used for demodulation RFID signals correctly at lower SNR. This could provide a more efficent way in solving RFID signal processing and long-distance application at low SNR.

关 键 词：低信噪比 无线射频识别信号 自适应 解调 

分 类 号：TN918.91[电子电信—通信与信息系统]