低电压差分信号远距离通信电缆参数估计  

Estimation of Long-distance Communication Cable Parameters for Low Voltage Differential Signaling

作　　者：方炜[1,2] 任勇峰 储成群[1] 焦新泉[1] FANG Wei;REN Yong-feng;CHU Cheng-qun;JIAO Xin-quan(National Key Laboratory for Electronic Measurement Technology Taiyuan 030051,China;School of Electrical and Control Engineering North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学电子测试技术国家重点实验室 [2]中北大学电气与控制工程学院,太原030051

出　　处：《科学技术与工程》2018年第19期209-212,共4页Science Technology and Engineering

基　　金：国家自然科学基金(61771434);重点实验室基金(61420010414162001002)资助

摘　　要：建立精确的线缆参数模型对于分析测量数据传输过程中的损耗特性,实现测量数据的高速、远距离可靠传输具有重要意义。在建立百米普通双绞线缆参数模型的基础上,通过最小二乘法估计出线缆的损耗特性。矢量网络分析仪对线缆的测试结果表明,在10~200 MHz的频率范围内,实测曲线与估计曲线的误差小于0.5 d B,估计出的参数模型表征的衰减特性与实测结果具有良好的一致性。该模型为研究低电压差分信号(low voltage differential signaling,LVDS)信号通过双绞线进行高速、远距离、可靠传输提供了理论依据。An accurate parameter model of cable is of great significance to estimate the data transmission loss and realize high speed,long distance,reliable transmission of measured data.Based on the establishment of parameter model for twisted-pair cable with the length 100 m,the least squares method is applied to estimate the loss property.The vector network analyzer is used to carry out the measurement and the result indicates that,within the frequency range of 10~200 MHz,the error of the measured curve and the estimated curve are less than 0.5 dB.The attenuation characteristic of the estimated parameter model keeps good agreement with the measured result.The proposed model provides theoretical basis for analysis of LVDS signal through twisted pair lines during high speed,long distance and reliable transmission.

关 键 词：双绞线 参数模型 衰减特性 数据拟合 

分 类 号：TN919.1[电子电信—通信与信息系统]