Cheers everyone for all the complementary comments that I receive off you. It makes me happy everytime I know I helped you. As I get various questions regarding all different uses of this, would you be interested in if I started a blog so links that are found could be shared? it could build up a vast array of knowledge to help us all out....?
Great! Last time i tried to learn this stuff, it was 3am in a bar in Amsterdam's Red Light District at IBC 2013. Much Easier! :) Great Tutorial thank you!
I was confused about difference angle and amplitude. After watching your tutorial , i got clear information . now it is transparent to me . Thanks for the tutorial.
What a shot Robert Webber. I have listen many other people but the way you have explained QPSK is just toooooo awesome. It is simply a crystal clear explanation. Hats off !!!!
Thanks. I just started working in Satellite Communications and was completely clueless to what QAM/QPSK was.... now I have a better understanding. You did a great job
Great Video Robert, I spent 10 years as a fixed wireless access engineer working up to 256 QAM for PtMP radio systems for Cellular back haul. I always had an understanding of this, but your video has made it much clearer.
@@WEBBERSPADE wow, time flies, I just worked it out, it was 2000 - 2009! I've since got into KVM over IP (its different, but many of the principles are relevant). I'll share this with my team as I've often tried to explain it to them.
From Wikipedias PSK article, its stated that "Although the root concepts of QPSK and 4-QAM are different, the resulting modulated radio waves are exactly the same". That is what put me off a bit. Thank you for your quick response and incredibly great videos!
Mr. Webber I appreciate the response. The QAM topic was actually postponed because the instructor wanted to cover FM/PM first. I can think of two points of feedback that may improve the videos. First would be including a problem and solution to show how the relevant mathematical principals are applied. The second would be using one of those electric pens so the whole thing can play out on a computer screen. It would make viewing easier in terms of glare and having your arm in the way. Thanks!
Mr. Webber, great explanation! I'm an electrical engineer and was looking for a video to explain in simpler terms (i.e. to non-engineers). Your video was quite informative and was exactly what I was looking for, thank you.
Wow....amazing tutorial! I've gone through so many websites, documents , books in past few days to properly understand QAM but without any luck. After going through your video I feel much better. You're an amazing teacher. Looking forward to check your all others videos too. Thanks.
Hi, Just want to thank you! From Montevideo,Uruguay. The first time I rurally understood qam ,I hope this help me to succeed on my next Modulation course exam.actually studying electrical engineering.
Superb explanation, I have been trying to understand these concepts for quite a bit and this is the best way I have come across and finally got to understand very clearly after watching this lecture
Woooow nice tutorial.I thought that i can't undestand the theory of drawing constelation diagram in my life time.via this tutorial i understood everything about how to draw a constelation diagram...tnx a lot..
Thanks man. As someone who uplinks to satellite every day using QPSK modulated signals, it's nice to understand the science behind it. I get the phase constellation, although I need to find out how you knew that the peaks of the two example waves were '135' and '225' which was then plotted on the polar graph.
Rob, Excellent Video & excellent teaching skills. You may not see yourself good video maker but the way you taught the topic, it was excellent. Thanks for the video.
Thank you for the video! I am currently taking a Communications Theory class and tomorrow we are covering QAM. I feel much more confident going in now, looking forward to check out the second video now.
I just saw this video.. as some of my friends wanted to know about QAM,QPSK. Have to say amazing effort.. and very good explanation... Sorry to be reviewing this critically.. but at one point you say 0 to 16 for 16 QAM ( its 0 to 15) ... just a very minor error .. but you can probly add as a note or so (it is around 24:11) Finally .. thanks from all of us.. great !
I'm glad I could help. How did the class go? Anything you could give me some feedback about? It would be nice to get your views on how this video is helping (that way I can make more to help people further)
Hello Stevphie. The 1/2 and 5/6 are referring to a different part to the OFDM System. It is called the code rate. You´ll have to look into that separate from QAM. Basically it is the ratio of what data is repeated. Data gets repeated incase of errors. So in 1/2, half of all the bits received are actually repeats, and in 5/6, only five sixths are useful data when the other sixth is a repetition of data. Search for CODE RATE in OFDM. Let me know how you get on. Take care
OMG... I am studying electrical engineering and you really explain it so clearly.... Amazing work :) Btw, believe it or not: if you ask many electrical students on how they got QPSK, they will not answer it fully like in this video!!!! These kind of basics are very important
Hello Christian, Thanks for the complement! The shift will be relative to the shape of the wave it is currently processing....... Imaging that I´m travelling on my Sine wave, I start at 0, then I curve up to a peak, then I start to fall down, then (and I use this moment as an example) when I arrive at 0 again, instead of carrying on down to a trough I find that my course has changed and I´m now rising up again. That is difficult to explain in words. Another quick video I think I need to make!
Hello Christian, From what all of my teachers, previous colleagues, and test equipment have stated is yes QPSK and 4QAM are the same thing. Maybe some other people may technically define it as something else. But I've never heard that. If you do, please let me know!
men your arm scared me a few seconds XD but dammit, from a student of telecom engineering i must say THANKS MEN, i'm in my last step and your video clear me a lot of things, really thank you
Robert, great contribution to mankind. We will survive as human race because people like you are around.
Oh stop it, I only did it for fun to see what would happen. not for the 100k+ views!!
+Robert Webber okay then please keep doing these things for fun your way to explain things are awesome god bless you ^-^
I agree. Thanks to people like you this society will be better! Thanks for making the complex stuff in a easy thing like this:)
world is a better place because there's guys like you !
return the favour Sohan! I'm sure you can contribute to sharing the knowledge too!!
Robert this is ever easiest way to understand constellation diagram at the very basic level,thanks buddy to help me, may God bless you
Cheers everyone for all the complementary comments that I receive off you. It makes me happy everytime I know I helped you. As I get various questions regarding all different uses of this, would you be interested in if I started a blog so links that are found could be shared? it could build up a vast array of knowledge to help us all out....?
yes! great idea!!!!!
cheers mate!
One of the only videos out there explaining QPSK from scratch. Awesome video for a first attempt!
Great! Last time i tried to learn this stuff, it was 3am in a bar in Amsterdam's Red Light District at IBC 2013. Much Easier! :) Great Tutorial thank you!
HAHAHA! I know the feeling. Mine was more at the MWC in Barcelona.
I was confused about difference angle and amplitude. After watching your tutorial , i got clear information . now it is transparent to me . Thanks for the tutorial.
The concept of modulation is finally understood after 5 years of attending university lectures on digital communication...thanks Bob.
What a shot Robert Webber. I have listen many other people but the way you have explained QPSK is just toooooo awesome. It is simply a crystal clear explanation. Hats off !!!!
Thank you John. This is the best simple explanation of QAM I have ever come across.
Thanks. I just started working in Satellite Communications and was completely clueless to what QAM/QPSK was.... now I have a better understanding. You did a great job
Great Video Robert, I spent 10 years as a fixed wireless access engineer working up to 256 QAM for PtMP radio systems for Cellular back haul. I always had an understanding of this, but your video has made it much clearer.
Glad I could help. Shame you didn't find this earlier as I made it around 10 years ago!!
@@WEBBERSPADE wow, time flies, I just worked it out, it was 2000 - 2009! I've since got into KVM over IP (its different, but many of the principles are relevant). I'll share this with my team as I've often tried to explain it to them.
@@BenedictBrand do you have LinkedIn? I just tried to find you but couldn't. You can find me if you want? "Robert John Webber".
Thank you for this video. I recently got hired by a company that produces cable test equipment and this is helping a lot.
Thanks for taking the time to start at the fundamentals, I think that is the best way to teach and learn.
i did both bachelor and master in communication engineering, and i haven't met someone who explained QAM the way u did ... Thank u so much
Thanks a lot for the explanation. I have my exam tomorrow and modulations like this will be part of it. Best greetings from germany.
Amazing! Your explanations helped me to pass my graduation exam! Thank you! :D
Awesome Explanation Robert.... I believe you are the outstanding Professor..Thank a lot and keep posting more video..
Great video! After so much time I can finally understand how these things work! Congratulations and keep up the good work!
All my math classes just came together. Awesome explanation man.
Im 16 and that video finally helped me to completely understand it! Many thanks :)
From Wikipedias PSK article, its stated that "Although the root concepts of QPSK and 4-QAM are different, the resulting modulated radio waves are exactly the same". That is what put me off a bit.
Thank you for your quick response and incredibly great videos!
Wow...Robert. That's super way of explaining. Was dumb about 'QAM'...but no more...Kudos to you.
thank you RObert. It's really helpful.
hey nice explanation
i loved ur that little board its really aowsome
Mr. Webber I appreciate the response.
The QAM topic was actually postponed because the instructor wanted to cover FM/PM first. I can think of two points of feedback that may improve the videos. First would be including a problem and solution to show how the relevant mathematical principals are applied. The second would be using one of those electric pens so the whole thing can play out on a computer screen. It would make viewing easier in terms of glare and having your arm in the way.
Thanks!
Mr. Webber, great explanation! I'm an electrical engineer and was looking for a video to explain in simpler terms (i.e. to non-engineers). Your video was quite informative and was exactly what I was looking for, thank you.
Wow, this stuff is easier than I thought. Thanks for the lecture mate!
Wow....amazing tutorial! I've gone through so many websites, documents , books in past few days to properly understand QAM but without any luck. After going through your video I feel much better. You're an amazing teacher. Looking forward to check your all others videos too. Thanks.
Fantastic!! Clear and concise. Brilliant. Many thanks.
Hi, Just want to thank you! From Montevideo,Uruguay. The first time I rurally understood qam ,I hope this help me to succeed on my next Modulation course exam.actually studying electrical engineering.
Thanks alot for the very simply and easy to understand explanation, I'm new in all this telecommunication stuff. Hope you do more videos
The best explanation of QAM I've ever seen!
Thanks a lot for such a great video. Just one little thing: in 16 QAM it should go from 0 to 15 and not 16. Thanks again for the helpful video. :)
Thanks Robert.My lab teacher could not explain me the QPSK graph.And I was really troubled.Thanks again.
Despite your self declared youth, remarkable explanation.Thanks.
i always hate math and numbers but i love watching people doing it right..great vid bud
Superb explanation, I have been trying to understand these concepts for quite a bit and this is the best way I have come across and finally got to understand very clearly after watching this lecture
Such a great video! I learnt a lot of new things here! Thank you so much for sharing your knowledge!
Woooow nice tutorial.I thought that i can't undestand the theory of drawing constelation diagram in my life time.via this tutorial i understood everything about how to draw a constelation diagram...tnx a lot..
Thanks man. As someone who uplinks to satellite every day using QPSK modulated signals, it's nice to understand the science behind it. I get the phase constellation, although I need to find out how you knew that the peaks of the two example waves were '135' and '225' which was then plotted on the polar graph.
This is an excellent explanation of QAM for students. Really well explained
I am very proud that I can influence you so positively!
Excellent I am major in telecommunication and my final year project is about Qam . Helpful for me thank u . Hope more video
Thank you very much. Your way of explanation is very good. Please keep posting such videos more and more.
Great video Robert. Very simple. Thanks
Great tutorial. Keep doing it for all the concepts in communication... All the very best
Rob,
Excellent Video & excellent teaching skills. You may not see yourself good video maker but the way you taught the topic, it was excellent. Thanks for the video.
That was awesome, beautiful breakdown of how to show qam
excellent. very good explanation and very easy to understand.
Thank you for the video! I am currently taking a Communications Theory class and tomorrow we are covering QAM. I feel much more confident going in now, looking forward to check out the second video now.
I just saw this video.. as some of my friends wanted to know about QAM,QPSK. Have to say amazing effort.. and very good explanation...
Sorry to be reviewing this critically.. but at one point you say 0 to 16 for 16 QAM ( its 0 to 15) ... just a very minor error .. but you can probly add as a note or so (it is around 24:11)
Finally .. thanks from all of us.. great !
Very informative and well presented. Thanks!
I'm glad I could help. How did the class go? Anything you could give me some feedback about? It would be nice to get your views on how this video is helping (that way I can make more to help people further)
Hey Robert Thanks for the video , It made it easy for me to Understand the the modulation methods ...You are the Best
You are the best Robert Webber!! great explanation! Now I will watch part 2 =P ....thanks a lot
Very interesting Rob and I liked the pace, keep up the good work. This might be a broad question but what was before QAM and how is QAM better?
Great Job! I hope you do more of these stuff.
Nice tutorial. As Amit, I have finally understood how QAM and QPSK modulation mean.
Robert, clear explanation. Thanks a lot
Thanks Robert, I have managed to work it out myself, these are the points on the axis i.e the phase
Hello Rob, Thank you for uploading such a simple to follow video on QAM.
Helped me lot in refreshing my basics.
This is such a good lecture I think it is worthy of re-doing with better lighting & sound
I got the clear picture now and better understanding on it...thanks a lot bro
Hello Stevphie.
The 1/2 and 5/6 are referring to a different part to the OFDM System.
It is called the code rate. You´ll have to look into that separate from QAM. Basically it is the ratio of what data is repeated. Data gets repeated incase of errors. So in 1/2, half of all the bits received are actually repeats, and in 5/6, only five sixths are useful data when the other sixth is a repetition of data. Search for CODE RATE in OFDM. Let me know how you get on.
Take care
OMG... I am studying electrical engineering and you really explain it so clearly.... Amazing work :)
Btw, believe it or not: if you ask many electrical students on how they got QPSK, they will not answer it fully like in this video!!!! These kind of basics are very important
good presentation sir. its very usefull for my final project presentation....finally wonderfull sir.
A very nice and easily understandable explanation
Awesome video, thank you for taking the time to explain.
Very good video, easy to understand. Compliments
You are awesome Robert! Thanks man!
Very nice tutorial. My concepts have now been cleared.
This is a good video to understand QAM thanks robert.
thank you very much... this video cleared my concept of QAM.. thnx for your help... ^_^
Excellent Information shared. Thanks you very much..!!
ROBERT IT'S VERY INFORMATIVE ....U R SUCH A GREAT GENIUS....THANKS A LOT......I REALLY ENJOYED.......
Robert this is excellent explanation.
Thanks. It's a real pleasure to have helped you
Thank you Robert, that was very helpful
WTF know i know the detail about 'polar graph' or constellation diagram. THANKYOU SO MUCH Robert Webber !!!
Very good tutorial, good explanation.
Hello Christian,
Thanks for the complement!
The shift will be relative to the shape of the wave it is currently processing.......
Imaging that I´m travelling on my Sine wave, I start at 0, then I curve up to a peak, then I start to fall down, then (and I use this moment as an example) when I arrive at 0 again, instead of carrying on down to a trough I find that my course has changed and I´m now rising up again. That is difficult to explain in words. Another quick video I think I need to make!
Hello Christian, From what all of my teachers, previous colleagues, and test equipment have stated is yes QPSK and 4QAM are the same thing. Maybe some other people may technically define it as something else. But I've never heard that. If you do, please let me know!
Good Video. It's been very helpful for the 17 year old son.
Awesome explanation!
Thanks for the video.
this is best tut i ever got! good and pretty helpful !!
Great job & straightforward !!!
Great explanation and a very well done video!
Really good explanation... Thanks a lot Robert...
Great!! Finally I understood QAM/QPSK Modulation. Thanks!
Thank a lot for your explanation...very clear!!
its really informative and too much vaulable, Can you please share something related to OFDM basics
Thank you so much for addin this video tutorials onto youtube Robert! I really learned and enjoyed there. Take care!
thanks Robert for the information . Its very informative
Great Vedio. Robert. Thanks you.
great effort sir......this lecture clear all my confusion.........thank you.
Great tutor,you really helped me. Thanks a lot
That makes me very happy. Good luck with your continued learning
Thank you for explaining, this here is the base of WIFI and satellite TV, to put it simply. NOW I can understand it!
men your arm scared me a few seconds XD but dammit, from a student of telecom engineering i must say THANKS MEN, i'm in my last step and your video clear me a lot of things, really thank you
Thanks for the reply, I am going to research this further because I don't really know about binary at all.