Live Q&A Discussion - Frequency Domain Signal Processing
John Edwards - Watch Now!
11:00:57 From Evan : Two questions: 1. Are cascaded integrator comb filters the type typically used for on-chip sigma-delta data converters (decimator for ADC, interpolator for DAC)? 2. Overlap-add vs overlap-save, is there a difference in effective filter response, since overlap-add isn't exactly the same operation as the fully time-domain convolution operation? 11:02:19 From mnapier : Lenard I would be interested in that paper. 11:04:00 From Chris Bore : In medical radar applications, using VNA (Vector Network Analyzer) the measurements are of CW signals, in I and Q (amplitude and phase, or complex phasor) - but most commonly FFTed to time domain pulse because that is what the radar engineers are used to - tell me that makes no sense? 11:04:56 From Michael Kirkhart : Might this be the app note? 11:05:00 From Michael Kirkhart : http://xanthippi.ceid.upatras.gr/people/psarakis/courses/DSP_APL/demos/APR8-sigma-delta.pdf 11:05:49 From Jonathan Bramwell : When filtering in the frequency domain should you window the time domain data prior to fft. and does the choice of windowing function effect the filter response? 11:06:17 From Ali Ficici : I have designed CIC filters for large interpolation or decimation rates. They are efficient but the BW of the signal needs to be fairly small compared to fs because of the droop in the filter. 11:07:26 From Evan : thanks! 11:13:10 From Timothy Young : Thanks for a great talk! 11:19:42 From christophe Blouet : the FFT should provide you accurate frequency and phase, the phase gives very good information on the timing 11:20:04 From christophe Blouet : and it's possible to go beyond FFT resolution 11:20:07 From Michael Kirkhart : No problem speakers to learn to say "let's take this offline' quicker 11:28:47 From Leo : Very interesting session 11:28:50 From Leo : thank you very much 11:29:00 From Ali Ficici : thanks John! 11:29:15 From Arthur Lobo : Thank you