The bandwidth of target signal after stretch processing and narrowband filtering, the data sample ratio and computing burden are reduced greatly and the method is easy for engineering implementation.
经拉伸处理和窄带滤波的目标信号带宽大大降低，数据采样率也大大降低，因此计算量减小，利于工程实现。
The audio processing digitization is using the digital filter algorithm to sample and process the audio signal.
音频处理的数字化是利用数字滤波算法对采集到的音频信号进行变换处理来实现的。
The basic theory of IF signal processing, such as sample theory, quartered demodulating technology, filtering, draw-off and interpolating theory is discussed.
然后介绍了数字化中频处理中的采样理论、正交混频解调、滤波抽取等基础理论。
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