great video presentation. RFSoC is the begining of a new future.
@avinasha237Ай бұрын
At 5:11 I must be cos and Q must be sin, input to the multiplier
@MUTIUBELLO-bm2hjАй бұрын
Thanks very much, great knowledge sharing
@MUTIUBELLO-bm2hjАй бұрын
Thanks for this great knowledge sharing
@PrashantBabu-k6t3 ай бұрын
This is the best video I've seen on frequency folding. The fan fold technique makes it so easy to understand. Thank you for this video!
@thanatosor3 ай бұрын
So that's where they use FPGA
@baghdadiabdellatif15814 ай бұрын
Thank you
@ChaplainDaveSparks5 ай бұрын
I absolutely *LOVED* this presentation! I graduated in 1976 with a BSEE, but all of this was a practical impossibility due to the relative slowness of existing compute power. Imagine trying to implement these ideas with an 8 bit microprocessor (think Z-80) running at a _”leisurely”_ 4 mHz.! And yet … all of the *COMPLEX MATH* was possible, just nothing fast enough to run it! Perhaps we ought to think ahead and create (theoretical) concepts, even if they have to wait *DECADES* to be practical. You know, the old humorous chemical equations that had a block labeled *_”An then a miracle occurs…”_* 😀
@theoryandapplication71975 ай бұрын
thank you very much
@kozlovskyi6 ай бұрын
omg. Finally I got my answers
@panduwilantara30706 ай бұрын
very amazing explanation, now i understand about SDR include I/Q Signal
@terjeoseberg9909 ай бұрын
At 1:40, that’s the weirdest sine wave I’ve ever seen!
@terjeoseberg9909 ай бұрын
At 7:40 I believe that’s only true when you don’t care about the negative frequencies.
@rolaki Жыл бұрын
Thank you
@Frankey2310 Жыл бұрын
Yeah, sorry if it's there and I've just missed it, but but how seems like you left out something major, i.e. HOW does this "digital complex mixer" get I and Q from just the sampled amplitude values? From what I could gather from the source code of uSDX (seemingly the only source on the subject), what it does is sample at 2 * Fs, treating even samples as I, odd as Q, but linearly interpolates the Is, replacing each one with the average of it and the next one. What this clearly does do is shift one of the streams in time by one sample period, so that the synthetic Is coincide with Qs. While the thing does work in the end, - the device does seem to receive SSB, which is the only use for the I/Q data there, as far as I can tell, - I can't possibly see a) how can those I values be correct beyond the simple assumption that both domains are (-1; 1), and, more importantly, b) any basis for the downright strange assumption that a shift by one sample in the array is equivalent to a 90 degree phase shift. This technique, which quacks like a dirty hack for the anemic 8-bit MCU it's written for, is called a "Hilbert transform" in the comments. Whatever. Correct or not, the whole transition from amplitude samples to I, Q pairs doesn't seem like an "implementation detail" you can just omit here, especially when the end result of the formulation is supposed to be a general SDR, and not some special case transceiver.
@phillipneal8194 Жыл бұрын
Excellent presentation. But the devil is in the details. Where do I get an ADC and a DAC breakout board at a cheap enough price( < $20) that will handle 200 MSPS ?
@ananthadattadhruva8689 Жыл бұрын
I am also concerned why you have not talked about AFE series of converter ICs, hope you can include them too.
@ananthadattadhruva8689 Жыл бұрын
Now we also have a different kind of SERDES protocols, such as ESI stream that seems to be having same charecteristics of JESD with deterministic latency.
@ananthadattadhruva8689 Жыл бұрын
I think even if we consider the clock cycles of 1600, and the JESD204 works happily at 4.5Ghz it is at 355ns, and for the LVDS it is around 99ns considering the 1Ghz sample. So yep 4 times slower, so detection capability goes down accordingly.
@tttuberc Жыл бұрын
This video is really helpful for me. Thank you very much
@mwerensteijn Жыл бұрын
Amazing video, very clear explained, thank you!
@aravindammu89 Жыл бұрын
Saw ur comment in bh registration video . Im aslo from kerala ...planning to get BH series number . Have u got BH Number
@gooblygob Жыл бұрын
What is the benchmark for an acceptable synchronous delay? Is it measured w.r.t to the sample rate? In your measurement, 27 ps time delay is 10% of the sample period, how do we know that's good enough. What are the results of out of sync data in time and frequency domain. Thanks
@AbuSous2000PR2 жыл бұрын
this is a massive technology i hope we keep it in the US
@ahmednor58062 жыл бұрын
🙏🌹
@randomguyonthenet2 жыл бұрын
Great video i was searching this for month's THX
@phillipneal81942 жыл бұрын
Nice presentation. Very clear.
@phillipneal81942 жыл бұрын
This is wonderful. I just found it on youtube. Thank you very much.
@robc38632 жыл бұрын
Looking for a detailed overview of the Tyloe quadrature demodulator that shows how the recombination of the 4 samples, 0/270, 90/180, results in the I and Q signals.
@thomaskosvic61032 жыл бұрын
The term bandwidth is used profusely in this presentation but is not defined mathematically or graphically in this presentation as far as I can see.
@zarathustra4982 жыл бұрын
Great video, its incredible how a deep understanding of a complex system by a skilled operator can do wonders. Check out the story of Zoltan Dani who modified an outdated radar system to "see" the stealth aircraft.
@robv38722 жыл бұрын
very good!
@copycarvers3 жыл бұрын
is there anyone who can help me how to design a GNSS/GPS receiver using Simulink or GNU Radio
@kumark3533 жыл бұрын
Excellent presentation of software Radio with much needed basics
@zhenyang72013 жыл бұрын
Very cool. Does it support PXI RF transceivers?
@adornesallyanne40643 жыл бұрын
elhh0 vyn.fyi
@samihawasli74083 жыл бұрын
Great presentation! As a front end guy I got roped into helping with the digital side of things. Your talk really helped to clarify a few things. Question though: On slide 11. If the situation were revered and we were working with a D/A, would the exact same thing happen? The D/A Fs = 40 Mhz, and we are trying to produce 30 Mhz, we would see an alias at 10 MHz?
@terjeoseberg9909 ай бұрын
Yes.
@antronx73 жыл бұрын
Wow, this ain't your typical RTLSDR usb stick.
@hariwi393 жыл бұрын
Clear explanation of presentation, thanks
@mrjoehimself3 жыл бұрын
best radar video on youtube, hands down
@mahendraprasadyadav8063 жыл бұрын
Speed of light wrong said
@chihokang88393 жыл бұрын
Thanks a lot. This is the best explanations on SDR that I've ever seen. This is the real deal.
@russelm51073 жыл бұрын
Perfect and Simple and Humble and to this and to tan and con and the back! Perfect Okay!
@henkvisser39253 жыл бұрын
Excellent presentation!
@TheAwakeForever3 жыл бұрын
买不到
@huutruongle3 жыл бұрын
It's a most perfect fundamental SDR presentation I've ever seen. Thanks for your contribution.
@deqortestowy3 жыл бұрын
Very nice presentation but... 5:12: there is a mistake in the first formula. You say: cos(f1)sin(f2) = 1/2*{sin(f1-f2) + sin(f1+f2)} which is wrong. It should be: cos(f1)sin(f2) = 1/2{sin(f2-f1) + sin(f1+f2)}. Second one is OK. Both formula should be presented in this way: cos(f1)sin(f2) = 1/2{sin(f2-f1) + sin(f2-f1)} cos(f1)cos(f2)=1/2{cos(f2-f1) + cos(f2+f1)}
@elnoggernog7 ай бұрын
Actually this is not really wrong since a negative frequency in the cos is the same as a cos with the positive frequency. Negative frequencies get "mirrored" up in the spektrum. Its only better to undertand in this case.