摘要
以电力信号为例,用仿真方法分析了影响系统精度的三种因素,即抗混叠滤波器的阶数与带宽、采样频率的高低以及补偿抗混叠滤波器的带内失真的数字滤波的参数。指出宽带低通、过采样、数字滤波方法可以实现高精度频谱分析。
There are three factors to affect the resolution in a frequency spectrum ana-lyzing system. They are the orders and bandwidth of the anti-promiscuous filter, sam-pling frequency and the parameters of the digital filter. This paper discusses the these factors and gives the result of how a high precision could be got with the broadband LPF, over-sampling and digital filter.
出处
《电测与仪表》
北大核心
2002年第6期21-23,26,共4页
Electrical Measurement & Instrumentation
