摘要
介绍了一种周期性任意波形总失真度的定义及其评价过程和方法,其特点是已知目标波形的数据序列,借助于周期精确测量技术和相关分析实现基波位置参数的精确测量,平移对齐目标波形与测量序列的对应位置后,使用最小二乘法实现任意波形的最优估计,用时域能量方式计算失真,并对测量系统本身的影响进行了补偿。仿真和实验均验证了该方法的正确性及可行性。该方法可用于任意波发生器产生的任意波形失真度的精确测量和计量校准。
A definition about the total distortion of periodic arbitrary waveform signals （TDPAWS） is presented, and the evaluation method of TDPAWS is introduced, The peculiarity is that the target waveform series is known. By using the periods precise measurement technique and the classical Fourier transform techniques, the base wave parameters are measured accurately. The arbitrary waveform is estimated in best by the least square method. By using the time domain energy method, one can get the TDPAWS that conclude all of the effects, such as the harmonic distortion, the spurious distortion, the noise distortion, and so on, the effect of measurement system to TDPAWS is presented by A/D bits. Meanwhile, in a group of imitation and experiments, both the correctness and the feasibility are proved. The method can be applied to the precise measurement and the test of the TDPAWS, especially in the big TDPAWS.
出处
《计量学报》
EI
CSCD
北大核心
2008年第2期172-177,共6页
Acta Metrologica Sinica
关键词
计量学
失真度
任意波
最小二乘法
评价
Metrology
Distortion
Arbitrary waveforms
Least square method
Evaluation
作者简介
梁志国（1962-），男，黑龙江巴彦人，长城计量测试技术研究所研究员，北京航空航天大学博士研究生，主要从事电学、无线电计量测试的研究。
