Digital Filtering - Part 3 - Creating highpass, bandpass and band reject filters скачать в хорошем качестве

Digital Filtering - Part 3 - Creating highpass, bandpass and band reject filters

In this video, I explain how to transform a windowed-sinc FIR (finite impulse response) lowpass filter into a highpass, bandpass and band reject (aka notch or bandstop) filter. I walk through the different methods from both a time and frequency domain aspect. All flowgraphs used in this video are available on my Github at https://github.com/JesterNoFool/grc. The original source code for GRC's standard filters can be found in firdes.cc. That file can be found on the Gnu Radio Github at https://github.com/gnuradio/gnuradio/.... The fundamentals on digital filtering can be found in Steven Smith's book: https://www.dspguide.com/ch14/5.htm Video sections: 00:00: Intro 00:24: Overview 00:57: Review of making a lowpass filter 03:42: Transforming a LP into HP using spectral inversion 08:14: Transforming a LP into HP using spectral reversal 12:41: Creating a BP using spectral inversion 15:08: Creating a BP by frequency-shifting a LP filter 18:23: Creating a BP by convolving LP and HP impulse responses 21:00: Creating a BR filter by spectral inversion of a BP filter