欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
为使标签获得更多能量,提出了一种新的用于无源RFID系统的能量有效的数据编码方法.它在一个码元周期内采用可调的非对等的高低电平持续时间,使高电平持续时间更多.性能分析结果表明,在40 kb/s的典型速率下,该编码使得阅读器到标签的基带信号携带的能量最多可高于Manchester编码84%;在非相干解调的ASK系统中,与Manchester编码具有相同的误码性能.针对该编码,同时还提出了一种新的用于无源标签的快速同步时钟提取方案.采用IIR带通滤波器与锁相环相结合的形式,保留了传统锁相环精准的优点,特别是IIR滤波器的反馈特性,使有部分数据丢失情况下也能快速提取同步.该方案在有10个码元丢失的情况下,仍可保持同步输出;该性能与滤波器参数相关.
英文摘要：
A data coding method for carrying more energy to the passive tag is presented for the RFID system. The basic idea of the coding is to set adjustable and asymmetric high and low level durations within a symbol cycle, and a longer duration for the high level. The performance analysis results show the energy of baseband data transmitted from reader to tags increases by 84% at most, compared with that of Manchester coding at typical 40 kb/s. The coding achieves the same BER performance of ASK system with non-coherent demodulation as Manchester coding. For the coding, a clock recovery scheme in which an IIR filter is combined with a PLL is proposed. The scheme maintains the accurateness of PLL, and especially for the feedback of the IIR filter, it can recover the clock quickly with long data dropouts. The scheme can withstand data dropouts of 10 baud, which is correlated with the parameters of the filter.
同期刊论文项目
同项目期刊论文
期刊信息
位置：