Does it benefit to have "arbitrary frequency response" interpolated, rather than as "direct points"?

Started by Anonymous in comp.dsp21 hours ago

So I'm trying to design arbitrary frequency response filter by following this: http://www.dspguide.com/ch17/1.htm there it displays one...

So I'm trying to design arbitrary frequency response filter by following this: http://www.dspguide.com/ch17/1.htm there it displays one desired arbitrary frequency response: http://www.dspguide.com/graphics/F_17_1.gif which shows to be made of some sort of different interpolation algorithms applied to certain intervals. Is this (interpolated "desired response") necessary or recommended ...


Why not just make FIRs by hand?

Started by mavavilj in comp.dsp22 hours ago 34 replies

I'm looking to use the overlap-add FFT technique for doing FIR filtering and many of the examples I've seen use some more known FIR design...

I'm looking to use the overlap-add FFT technique for doing FIR filtering and many of the examples I've seen use some more known FIR design method such as the window method for designing the FIR that will be convolved with the input. However, To me it seems like in the overlap-add FFT technique it should be possible to define the FIR by hand by simply drawing the frequency response as values ...


Time-varying overlap-add FFT filtering?

Started by Matti Viljamaa in comp.dsp5 days ago 5 replies

I'm thinking of trialing with overlap-add FFT filtering, but rather than ha= ving a static filter (the filter stays the same after the design)...

I'm thinking of trialing with overlap-add FFT filtering, but rather than ha= ving a static filter (the filter stays the same after the design) I'd like = to implement a time-varying overlap-add FFT filter. So that I can modify th= e gain and frequency characteristics of the filter perhaps in an "adaptive"= way over time. However, my question regarding this is how can I get smooth adjustmen...


Computer made with a zilog chip

Started by Vassilis Spiliopoulos in comp.dsp1 week ago 27 replies

I am going to make a computer or at least attempt to using some CPU chips and breadboards. The initial idea is to link each output pin such...

I am going to make a computer or at least attempt to using some CPU chips and breadboards. The initial idea is to link each output pin such as halt to a led light.And the address buses too and link the inputs to switches.It will be a very basic CPU unit. What are your thoughts on this? -- ----Android NewsGroup Reader---- http://usenet.sinaapp.com/


What does it mean to convert frequency domain into rectangular form?

Started by Anonymous in comp.dsp1 week ago 2 replies

Here: http://www.dspguide.com/ch17/1.htm A description on creating arbitrary magnitude response filter using iFFT is given. There it's also...

Here: http://www.dspguide.com/ch17/1.htm A description on creating arbitrary magnitude response filter using iFFT is given. There it's also said that: "The next step is to take the Inverse DFT to move the filter into the time domain. The quickest way to do this is to convert the frequency domain to rectangular form, and then use the Inverse FFT." What does it mean to convert the frequ...


What does it mean to convert frequency domain into rectangular form?

Started by Anonymous in comp.dsp2 weeks ago 1 reply

Here: http://www.dspguide.com/ch17/1.htm A description on creating arbitrary magnitude response filter using iFFT is given. There it's also...

Here: http://www.dspguide.com/ch17/1.htm A description on creating arbitrary magnitude response filter using iFFT is given. There it's also said that: "The next step is to take the Inverse DFT to move the filter into the time domain. The quickest way to do this is to convert the frequency domain to rectangular form, and then use the Inverse FFT." What does it mean to convert the frequ...


selective fft

Started by amara vati in comp.dsp2 weeks ago 32 replies
FFT

which is the best fft method if want the spectrum only for a selective set of points, say only 10-20% of the points in the entire spectrum. amar

which is the best fft method if want the spectrum only for a selective set of points, say only 10-20% of the points in the entire spectrum. amar


OT: Calculators

Started by Anonymous in comp.dsp2 weeks ago 3 replies

I discovered this when solving one of those trivia questions. The question was to find out what 36 divided by 2.(3)+ 4 can't get the...

I discovered this when solving one of those trivia questions. The question was to find out what 36 divided by 2.(3)+ 4 can't get the division symbol on this PC. Correct answer should be to write this as 36/2 X 3 + 4 =58 a computer would interpret it thus. Type that into a calculator and you will get 58 if you type 36 divided by 2X(3) + 4 where it doesn't matter whether th...


Signal to noise ratio calculation

Started by abhi5491 in comp.dsp2 weeks ago 5 replies

I have implemented RLS algorithm on TMSC6713 DSK.I am confused with calculation of signal to noise ratio. I have achieved snr by two different...

I have implemented RLS algorithm on TMSC6713 DSK.I am confused with calculation of signal to noise ratio. I have achieved snr by two different means and the results are different.Can any one help me finding the right one. All the samples are aligned and equalized Method 1: I gave speech+noise to the adaptive filter.The speech signal was having a long pause in between.So I recorded the ...


Visibility of email addresses when posting in this group

Started by Matti Viljamaa in comp.dsp2 weeks ago 11 replies

So as a newcomer to this group (and this is one of the first Google groups where I'm posting) I've noticed that the posts that I and some others...

So as a newcomer to this group (and this is one of the first Google groups where I'm posting) I've noticed that the posts that I and some others make display my gmail address(es). My questions regarding this are: -Is there a privacy concern? Can my email addresses end up to spam bots from this site (or another Google group for that matter)? -Is there a way to hide the email? -Is there anyt...


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