摘要
根据 DAC的幅频特性 ,当输入信号频率接近奈奎斯特采样率时 ,输出信号幅度衰减约 3 .9d B。文中设计了补偿此衰减的数字滤波器 ,并提出一种节省资源的高效实现方法。最后 ,给出了实验结果 。
It can be seen from the amplitude-frequency charactersitic of the digital to analog Converter that the DAC amplitude attenuate about 3.9 dB when the frequency approaches the Naquist frequency.So,the frequency response degraded.A kind of inverse sampling filter is designed in order to compensate this attenuation and some methods is proposed to save the design resource.At last,some experiment results are presented and the availability of the inverse sampling filter is verified.
出处
《遥测遥控》
2004年第4期54-58,共5页
Journal of Telemetry,Tracking and Command
