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Live Q&A with Travis Collins - Software-Defined Radio: Principles and Applications

Travis Collins - Watch Now - Duration: 28:17

Live Q&A with Travis Collins for his talk titled "Software-Defined Radio: Principles and Applications"
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ZiglioUK
Score: 0 | 2 years ago | no reply

As a follow-up to this talk, here's a classic talk by Marc Ettus where he uses a GNU-Radio model to simulate various I/Q imbalances
https://youtu.be/PNMOwhEHE6w

marek_klemes
Score: 0 | 2 years ago | 1 reply

The "Low IF" digital radio architectures do not suffer from IQ imbalance and DC offset issues. Those issues apply only to "Zero IF" architectures.

mpuchlik
Score: 0 | 2 years ago | no reply

Zero IF is the AD9361/AD9364 architecture that's why there was a discussion about this.

SlightlyChaotic
Score: 0 | 2 years ago | no reply

Question on slide 14 related to mixing in an FM radio - when I move the dial to change my station, is that adjusting the RF Filter, and is the local oscillator always constant?

mpuchlik
Score: 0 | 2 years ago | no reply

Hello, thank you Travis for this lecture. I am interested how quadrature tracking, RF DC and BB DC corrections work in practice. Are those algorithms are implemented in analog or digital domain? If in digital domain is it done in FPGA or in CPU? Any guidance would be appreciated.
Cheers

SlightlyChaotic
Score: 0 | 2 years ago | no reply

Oh, yeah, and same as @napierm, I'd like the slides if you can put them out for download.

SlightlyChaotic
Score: 0 | 2 years ago | no reply

Thanks, Travis, I periodically heard about SDR's but never had the chance to look into what they were, and the little blurbs I read online, well I just had trouble understanding them. This was very clear, and the nuances to the different types - as well as connecting back to the history - was helpful.

napierm
Score: 1 | 2 years ago | no reply

Will you post your slides?

16:32:46	 From  mnapier : I don't see how to raise my hand, looking....
16:33:10	 From  Michael Kirkhart : Nice to hear you talk again - I attended the GNU Radio conference about 2 weeks ago (on-line).
16:51:44	 From  Fred Harris : I have some papers on I-Q imbalance and DC cancelers as well as image reject canceling algorithms...
16:52:07	 From  Marcin Puchlik : Mr F. Harris, I would be interested
16:53:49	 From  Fred Harris : drop me an email  fjharris@ucsd.edu will send them to you...
16:54:22	 From  Marcin Puchlik : Sure! Thank you so much, I am sending a mail asap :)
16:54:40	 From  Fred Harris : we all the imbalnces and toleranc effects of I-Q analog processing  "Dirty RF"
16:54:55	 From  Fred Harris : spelling...
16:56:21	 From  Fred Harris : We call the imbalances and tolerances effects of I-Q analog processing ( including Image folding), "Dirty RF"
16:57:14	 From  Michael Kirkhart : I believe you are referring to the 5G FR2 bands.
16:58:01	 From  Michael Kirkhart : https://www.electronics-notes.com/articles/connectivity/5g-mobile-wireless-cellular/frequency-bands-channels-fr1-fr2.php

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