1. "It takes lots of power if the antenna is significantly smaller than the wavelength of interest." 04:00 2. He wants to construct a lambda antenna, but what about spatial sampling theorem? 07:30 3. X(omega - omega_c) 13:20 3. "Frequency Division Multiplexing: Frequencies have to be high compared to the message frequency." 25:00 4. Modulation and aliasing? 25:45
How to see conjugate symmetry? 15:45 Multiplying cosine with a function so the product becomes 1 is a bad idea, as with the zeros the function would have to go to infinity. 22:30 Synchronous modulation. 22:50 (You have to be exactly synchronized in phase?) Red and blue Dirac? 26:45
Just checked the MIT OCW playlist and it's there. Maybe you are using a different playlist? MIT OCW's playlist: th-cam.com/play/PLUl4u3cNGP61kdPAOC7CzFjJZ8f1eMUxs.html. Best wishes on your studies!
and then, sidebands appear out of nowhere, by choosing the correct formula, none of these professors actually know, in a technical way, how those sidebands appear in a technical sense. it is called amplitude modulation because when originally thought up the composite showed an amplitude modulation and the changing of the plate voltage of the tube, no one suspected the presence of sidebands until over a decade later. And here we are teaching with composite waveforms to perpetuate the misnaming. It is like the direction of electron current flow, professors just keep teaching what is passed along even if it is wrong, because they can not unlearn what they initially learned. So, do you, after watching this, know where the sidebands came from without resorting to parroting the formulas above....I did not think so.
15:57 for anyone else curious. I believe you are correct Sergio and that the instructor missed the negative sign as e^(jwt) = cos(wt)+j sin(wt) but e^(-jwt) = cos(wt) -j sin(wt).
One thing I hate todays college education, not just this source, but throughout US high education is that the courses can't cover the full content they intended to, mostly because of lack of time. Like this lesson is all great right till the end, when the professor rushes through some good content. It is like right after you build up all the fundamentals, then you lose the product. I often hear professors complain that they have to shrink a two semester course into one, missing a lot of good stuff. The students suffer this way.
The course materials is very much IT technology and the explanation of, And it spams my understanding in the objective analysis due the information containing IT technology in the mere example of a module. Much rather have a business module explanation which gets into the different types of business within a control list in enumerated way,which presents meta data or styles of a business which might determine the provisions in ramifications to create an off sets that has been procured.
Weed plays those tricks on your mind, making you think you have had an epiphany of brilliance, some revelation of pure genius. Really though, you are just confused. Revisit your idea when you are sober and lucid and you realize how dumb your idea was.
What a great exposition of the theory of modulation as well as the history of its use for one of its most widely used applications!
1. "It takes lots of power if the antenna is significantly smaller than the wavelength of interest." 04:00
2. He wants to construct a lambda antenna, but what about spatial sampling theorem? 07:30
3. X(omega - omega_c) 13:20
3. "Frequency Division Multiplexing: Frequencies have to be high compared to the message frequency." 25:00
4. Modulation and aliasing? 25:45
👍
How to see conjugate symmetry? 15:45
Multiplying cosine with a function so the product becomes 1 is a bad idea, as with the zeros the function would have to go to infinity. 22:30
Synchronous modulation. 22:50 (You have to be exactly synchronized in phase?)
Red and blue Dirac? 26:45
Superb explanation, prof. Scientific findings with historical background. A great way to engage the class.
This professor kinda sounds like Heath Ledger's Joker lol
watch NPTEL (IIT Delhi)analog communication lectures by Prof Surendra Prasad.he is absolute gold.
What a great lecture indeed!
Modulation (Part 2) is missing from the playlist, but is available on the mit website.
Just checked the MIT OCW playlist and it's there. Maybe you are using a different playlist? MIT OCW's playlist: th-cam.com/play/PLUl4u3cNGP61kdPAOC7CzFjJZ8f1eMUxs.html. Best wishes on your studies!
DAMN!May the gods bless him
Thank YOU
I used to watch the 1975 course, It was pretty good
but ofc we need something new :)
Thanks MIT because U changed the world
is that old course still up?
I like that they use the metric system :)
and then, sidebands appear out of nowhere, by choosing the correct formula, none of these professors actually know, in a technical way, how those sidebands appear in a technical sense. it is called amplitude modulation because when originally thought up the composite showed an amplitude modulation and the changing of the plate voltage of the tube, no one suspected the presence of sidebands until over a decade later. And here we are teaching with composite waveforms to perpetuate the misnaming. It is like the direction of electron current flow, professors just keep teaching what is passed along even if it is wrong, because they can not unlearn what they initially learned. So, do you, after watching this, know where the sidebands came from without resorting to parroting the formulas above....I did not think so.
A great tutor with awesome explanations. Thanks for the lecture
loved his instruction very social
Excellent lecture from a brilliant sprite ❤
Actually, the antenna length should be lamda/4 or lambda/2.
True, but the point is still valid.
thank you for the lecture .
thanks for the lecture
Thank you
great lecture, thanks!
Really enjoyed this! Thank you!
What are your expecting to get from MIT OpenCourseWare, if not videos like this? Or is the problem the volume?
very nice lecture.
thanks for awesome lecture!
Pardon my ignorance, but doesn't e^(-jwt) = cos(wt)-jsin(wt)? instead of cos+isin?
I think it has something to do with split complex number. Just google it,
15:57 for anyone else curious. I believe you are correct Sergio and that the instructor missed the negative sign as e^(jwt) = cos(wt)+j sin(wt) but e^(-jwt) = cos(wt) -j sin(wt).
Tesla was the inventor of radio.
Uh, no.
Good
👌
One thing I hate todays college education, not just this source, but throughout US high education is that the courses can't cover the full content they intended to, mostly because of lack of time. Like this lesson is all great right till the end, when the professor rushes through some good content. It is like right after you build up all the fundamentals, then you lose the product. I often hear professors complain that they have to shrink a two semester course into one, missing a lot of good stuff. The students suffer this way.
I will be leaving now
It's OK to praise the Lord!
nice lacture
Professor Frink!!
how do you choose R and C value in the circuit?
Just a low pass filter so the corner is about at the highest signal frequency needed: f = 1/ (2*pi*R*C)
His modulation is hot hahah
he can modulate me anytime
when a teacher asks the class questions over and over again and no one can answer it, means you suck at teaching the material
He's kind of smug.
I don't think the lecturer is in touch with his students... Brilliant person, not a great teacher
The course materials is very much IT technology and the explanation of,
And it spams my understanding in the objective analysis due the information containing IT technology in the mere example of a module.
Much rather have a business module explanation which gets into the different types of business within a control list in enumerated way,which presents meta data or styles of a business which might determine the provisions in ramifications to create an off sets that has been procured.
I'm sorry, but how would modulation be used in business?
get a load of this nigga tryna sound smart before even learning to english lmao
Weed plays those tricks on your mind, making you think you have had an epiphany of brilliance, some revelation of pure genius. Really though, you are just confused. Revisit your idea when you are sober and lucid and you realize how dumb your idea was.
The field of study is a particular approach in the academe
Great lecture! Thank you.
Thank you