用于移动支付的自适应曼彻斯特解码器设计

发布时间：2018-06-13 00:47

本文选题：限制距离通信 + 曼彻斯特码　；参考：《微电子学与计算机》2017年01期

【摘要】：限制距离通信中进行差分曼彻斯特解码时,由于RC振荡器产生的时钟有较大的偏差,导致误码率升高.本文提出的解码电路首先对解码信号进行滑动平均滤波,去除信号毛刺;在数据变换电路中,将信号方波变换成三角波.针对变换后的三角波,采用自适应的方法设置高电平门限和低电平门限,用来判断采样后的高低电平,同时通过判断三角波的波峰和波谷恢复出时钟和中间数据,进行差分曼彻斯特解码.实验表明,本文电路能在时钟偏移正负30%条件下稳定解码,且电路结构简单,实现成本较低.
[Abstract]:When the differential Manchester decoding is carried out in the limited distance communication, the error rate is increased because the clock produced by the RC oscillator has a large deviation. The decoding circuit proposed in this paper firstly filters the decoded signal by moving average filter to remove the burr of the signal, and in the data conversion circuit, the square wave of the signal is transformed into a triangle wave. For the transformed triangle wave, the high level threshold and the low level threshold are set by adaptive method, which is used to judge the high and low level after sampling. At the same time, the clock and intermediate data are recovered by judging the peak and valley of the triangle wave. The differential Manchester decoding is carried out. The experiments show that the circuit can decode stably under the condition of positive or negative 30% clock offset, and the circuit structure is simple and the cost is low.
【作者单位】：中国科学院深圳先进技术研究院;华中科技大学光电学院;
【分类号】：TN402;;TN923

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