DSPRelated.com

Safwan Arekat (@Safwan)

I am a retired physics professor and an electrical engineer. BSEE from University of Texas at Austin. MSc, PhD in Physics from University of Oregon. My interest is in the field of the physics of semiconductor. Recently, I reclaimed my interest in DSP, especially filtering.

Re: Digital signal processing

Reply posted 11 months ago (06/02/2023)
 About DSP:"I was getting close to where I could see the truth. Someday I'll be brave enough to speak it"  Ponyboy, 1967 novel "The Outsiders"About Life:Religion...

Re: LEGO Block Filters

Reply posted 11 months ago (05/22/2023)
Hello Cedron,Yeah.. I guess I am still influenced by academic prejudice. But your opinion is taken to heart, and so is Rick's.Still, there ought to be "authoritative...

Re: LEGO Block Filters

Reply posted 11 months ago (05/22/2023)
Hi Kaz,Yes Kaz, I agree. All the cases you mentioned in Matlab  depend on the Fourier theorems. Other bases like using, for example, the discrete Walsh functions...

Re: LEGO Block Filters

Reply posted 11 months ago (05/22/2023)
Hello Rick Lyons,I gave it some more thought since last night. I must have stumbled upon a version of the Sampling Theorem, one that is applied to periodic transforms...

Re: LEGO Block Filters

Reply posted 11 months ago (05/21/2023)
Hello Rick Lyons,Thank you for your reply. Your question about the "Frequency Sampling Method" has much merit to it. I have not read the book, but I remember the...

Re: LEGO Block Filters

Reply posted 11 months ago (05/21/2023)
Rick Lyons Dear Sir, Firstly, I am honoured you saw fit to reply to my post. I have learned much from your expertise over the past couple of years, and from your...

LEGO Block Filters

New thread started 11 months ago
Hello All,Considering the availability of mature and and advanced linear phase FIR filter design techniques, many might look sideways at "novel claims" for filter...

Re: The Anatomy of a Finite Impulse Response

Reply posted 11 months ago (05/16/2023)
Hi Kaz.   Wholeheartedly!   When concerned with obtaining the frequency response of an FIR, say for an engineering project, I myself have used nothing but the...

Re: The Anatomy of a Finite Impulse Response

Reply posted 11 months ago (05/16/2023)
Hi Kaz,  For some reason I was unable to edit my post here. Maybe because of the figures. Please inspect the attached file IR Example.pdf , it has an example and...

Re: The Anatomy of a Finite Impulse Response

Reply posted 11 months ago (05/15/2023)
Wow! Did not know you could do that on twitter. So, your demonstration even corrected what I said earlier! The phasors do not need to be anti-aligned for quenching...

Re: The Anatomy of a Finite Impulse Response

Reply posted 11 months ago (05/15/2023)
Hi Kaz. Granted, in digital filtering, there is no alternative that comes even close to the DTFT model. I never claimed this. But I was just trying to re-arrange...

Re: The Anatomy of a Finite Impulse Response

Reply posted 11 months ago (05/15/2023)
Hi DanBoschen, The complex phasor concept, with n-fold whole rotations depending on z^-n (I did not realize this), surely adds the dimension needed to cover asymmetrical...

Re: All Pole Transfer Functions

Reply posted 11 months ago (05/15/2023)
I read and downloaded your post "Second Order Discrete-Time System Demonstration". It makes the subject so much more approachable to those not familiar with it,...

The Anatomy of a Finite Impulse Response

New thread started 11 months ago
Hello All,As soon as my early adulthood passion for electrical engineering re-asserted itself, post-retirement, and after decades of teaching and researching physics,...

Re: All Pole Transfer Functions

Reply posted 11 months ago (05/13/2023)
Thanks Neil, I will surely take a look.

Re: All Pole Transfer Functions

Reply posted 11 months ago (05/13/2023)
Dear CharlieRader, I stand corrected. I did not see your point initially. The two zeros in the numerator will add a linear phase shift. Apologies for my earlier...

Re: All Pole Transfer Functions

Reply posted 11 months ago (05/13/2023)
CharlieRader, thanks for your reply. You're right of course. But this does not detract the uniqueness of H(z) due to the perfect pole-zero cancellation of these...

Re: All Pole Transfer Functions

Reply posted 11 months ago (05/12/2023)
Hi Neil,Thank you so much for taking the time to check the filter vs. the standard Butterworth. You simulation is very clear and your conclusion makes a lot of...

All Pole Transfer Functions

New thread started 11 months ago
Hello All,  I think I developed a method for obtaining IIR  low-pass filters. It relies on all-pole z-domain transfer functions. The design is directly made...

Re: Electromagnetic waves question

Reply posted 11 months ago (05/10/2023)
You're right. RF engineers have no need for photon processing. At these frequencies, and with the very large numbers of photons involved, the RF electromagnetic...

Re: Electromagnetic waves question

Reply posted 11 months ago (05/10/2023)
The sensation of colour as decoded by the cone cells in the retina depends on the light photon energy, which is a quantum mechanical effect. The photon gives up...

Re: Electromagnetic waves question

Reply posted 11 months ago (05/10/2023)
Hi Kaz,  I tried to reply to your first question, but for some reason it was not posted. The replies regarding the interference of different light waves are correct...

Re: Electromagnetic waves question

Reply posted 11 months ago (05/09/2023)
Hi Kaz, The replies already given are correct answers, but maybe you mean something else. If you mean by "interaction" that the waves should exchange energy/momentum: Well,...

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