It is truely a brilliant explanation of modulation schemes ... so easy to understand when starting vom BPSK. Thank you so much, other clips just mixed everything or needed previous knowledge.
Nice explanation. Also worth mentioning that this tech also applies on cable. I hope there is an explanation if and how a wifi router regulates the modulations and how much router software can improve the transmissions between devices in a noisy area.
in my head, drawing upon a distant mechanical background, it looks like sending nuts down a bolt, each nut has a '12 o'clock marker' and it depends upon where you put that marker, in phase, out of phase, quarter phase, eighth, then when it comes to amplitude, its like sending a bigger or smaller not on that same bolt.
I've always wondered where you get the phase reference. If you move 1/4 wavelenght away from signal, all phases get shifted by 90 degrees and so on. I think QPSK, QAM and all a like are very clear but like phase shift with distance, it is totally unclear like how you know which signal is I or Q in IQ-modulation/decoding, another phase reference mystery to me.
Why is 90 degrees not on the top? The vector turns counter clockwise beginning on the right. So it needs to be on the top. Please can you change your handwriting?
Thanks for the explanation. I have question about QAM long in my mind, when travelling in the air, amplitude of a wave should be decreasing, I suppose. How can the recipient know the sender's original wave amplitude?
really clear. is it possible to transmit some data at low speek using BPSK while transmitting complementary data at higher speed using #QAM? on the same band
great video, but you said that BPSK is more resilient than QPSK which is actually not correct they have the exact same BER curves, hence for the same amount of power you can send double the data rate using QPSK compared to BPSK, and still have the same error rate.
This, as I understand it is technically "Amplitude Modulation", meaning the receiver determines the info being conveyed based on the Amplitude changes. QAM= Quadrature Amplitude Modulation. I guess the "timing" would be based off of the frequency of the wave. But dont get this confused with FSK
this was legitimately one of the best basic explanations of digital modulation i have seen.
You have explained something so easily that famous professors from MIT have trouble explaining. Great job!!
I’ve been studying ICT for like three and a half years and noone ever explained modulation to me so well. Thank you for this video.
Learned more things in single video than my entire semester
It is truely a brilliant explanation of modulation schemes ... so easy to understand when starting vom BPSK. Thank you so much, other clips just mixed everything or needed previous knowledge.
Glad it was helpful!
The best modulation explanation
Simplest but detailed explanation
I understand this at first time , you are real teacher
If you can't explain it simply, you don't understand it well enough…….thank you very much for making this concept very simple and easy to understand…
Glad it was helpful!
Amazingly explained, thank you!
Thank You So Much. Exactly What I was looking for.
Nice explanation. Also worth mentioning that this tech also applies on cable. I hope there is an explanation if and how a wifi router regulates the modulations and how much router software can improve the transmissions between devices in a noisy area.
can you Americans stop amazin' me ?!! i really can't thank you enough man , and merriest xmass to you
Thank you for the video ! Very helpful and easy to understand 😊☺️
in my head, drawing upon a distant mechanical background, it looks like sending nuts down a bolt, each nut has a '12 o'clock marker' and it depends upon where you put that marker, in phase, out of phase, quarter phase, eighth, then when it comes to amplitude, its like sending a bigger or smaller not on that same bolt.
Well explained. Thank you!
Exactly what i needed. Thank you so much :)
Very good explanation, many thanks
Glad you liked it, Marco! Thanks for watching!
A very nice explanation - thank you :)
brilliant thank you
Thanks! 💟
Brilliant! Just brilliant
Excellent explanation sir
Much appreciated! Thanks for watching!
Great video!
Amazing !
Excelente explicación.
Thanks for watching, Yhoel!
I've always wondered where you get the phase reference. If you move 1/4 wavelenght away from signal, all phases get shifted by 90 degrees and so on.
I think QPSK, QAM and all a like are very clear but like phase shift with distance, it is totally unclear like how you know which signal is I or Q in IQ-modulation/decoding, another phase reference mystery to me.
One world "AWESOME". 👍
Thanks for this excellent video
Very clear! Thanks
nicely done
Great video! Thanks!
When I studied commu decades ago , We only knew probability bit error and highest modulation on baseband was only qpsk.
Why is 90 degrees not on the top? The vector turns counter clockwise beginning on the right. So it needs to be on the top. Please can you change your handwriting?
i think is a erro by the autor. I have the same question. I think Is the same but rotating diagram counterclockwise by 90 degrees
Just a matter of convention.
In Italy all engineers do like you said.
All the Geometers do as in the video.
Conventions :)
This is really good work.
Thanks for the explanation.
I have question about QAM long in my mind, when travelling in the air, amplitude of a wave should be decreasing, I suppose. How can the recipient know the sender's original wave amplitude?
Thank you
Great video
really clear.
is it possible to transmit some data at low speek using BPSK while transmitting complementary data at higher speed using #QAM? on the same band
NICE!!!
Bravo
great video, but you said that BPSK is more resilient than QPSK which is actually not correct they have the exact same BER curves, hence for the same amount of power you can send double the data rate using QPSK compared to BPSK, and still have the same error rate.
Is this considered frequency modulation or “timing” modulation for lack of a better term. It sounds like they all have the same frequency/hertz
This, as I understand it is technically "Amplitude Modulation", meaning the receiver determines the info being conveyed based on the Amplitude changes. QAM= Quadrature Amplitude Modulation. I guess the "timing" would be based off of the frequency of the wave. But dont get this confused with FSK
I think it's actually phase modulation
plz explain constellation switched QAM
I'll be sure to add your suggestion to our queue of questions
Nice explanation.. #HariKrishnaSahu