摘要
利用阶跃脉冲代替传统时域反射计(TDR) 中的测试矩形脉冲, 可较好地解决距离分辨率的问题。同时利用高斯参数估计、短时间常数定位及测试等方法, 较好地解决了由于双绞线有限带宽, 使阶跃脉冲上升沿在传输过程中出现的“缓升”现象, 给故障参数测试造成的精度不高的问题。仿真结果表明: 采用上述方法以后, 用户双绞线传输系统的故障测试精度有了较大的提高。
Using of the step pulse to replace the rectangle pulse of tradition test, the problem of the distance resolving power is better solved. At the same time, using the Gauss parameter estimation, shorting time constant fixed position and test, to be better to solve the step pulse “slowing rise” in deliver process bring to error of parameter testing because the limit bandwidth. The simulation result indicates: adopting above method, the fault measurement precision of subscriber twisted-pair transmit system has a better impro vement.
出处
《计算机测量与控制》
CSCD
2005年第4期324-326,共3页
Computer Measurement &Control
关键词
通信电缆线路
双绞线电缆
故障
阶跃测试方法
时域反射计
time-domain analysis
Gauss estimation of parameter
pulse “rising slowly”
shorting time-constant
simulation
