As a key technology in digital quadrature demodulation system, the direct IF sampling filter with sharp cutting-off transition band can improve the performance of demodulation system.
中频采样是数字正交鉴相系统中的一项关键技术，具有锐截止特性的中频采样滤波器可以改善鉴相系统的性能。
In addition the device offers programmable decimation rates and the digital FIR filter can be adjusted if the default characteristics are not appropriate to the application.
此外，该器件提供可编程抽取率，而且如果数字FIR滤波器的默认特征不适合应用要求，还可对其进行调整。
In addition, the device offers programmable decimation rates, and the digital FIR filter can be adjusted if the default characteristics are not appropriate for the application.
此外，该器件提供可编程抽取率，而且如果数字FIR滤波器的默认特征不适合应用要求，还可对其进行调整。
The analysis shows that there exist some weakness if an analogue filter is taken as a compensator. Therefor a FIR digital filter is designed to replace the analogue filter.
在分析了用模拟滤波器作为补偿器的不足之后，进而提出用FIR数字滤波器取而代之。
The analysis shows that there exist some weakness if an analogue filter is taken as a compensator. Therefor a FIR digital filter is designed to replace the analogue filter.
在分析了用模拟滤波器作为补偿器的不足之后，进而提出用FIR数字滤波器取而代之。
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