摘要
现行的Type B型无源射频识别(RFID)系统,采用曼彻斯特编码、ASK调制方式,电子标签从读写器获得的能量受到了限制。为了克服这种缺点,提出一种改进的数据编码方法,延长了编码中高电平的持续时间。性能分析结果表明,使用这种方法可以在相同的解调方式下提高电子标签从读写器获得的能量,并能保证和曼彻斯特编码有相同的误码率。随后用FPGA芯片实现了该编码方法的硬件电路设计。
The Manchester coding method and the ASK modulation are used in the actual passive Radio Frequency IDentification （RFID） system complying with Type B. The energy of the tag from the reader is limited. In order to overcome this shortcoming, an improved data coding method was presented in this paper. In this method the duration of the high level is longer. The performance analysis results show that the tag can get more energy from the reader in this way with the same modulation, and it can achieve the same Bit Error Rate （BER） performance as Manchester coding method. And then a hardware circuit was designed for this coding method with FPGA.
出处
《计算机应用》
CSCD
北大核心
2010年第A01期32-34,共3页
journal of Computer Applications
关键词
射频识别
编码方法
能量
电子标签
误码率
Radio Frequency IDentification （RFID）
coding method
energy
tag
Bit Error Rate （BER）
