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!
@cosmic_husky9 жыл бұрын
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
@felixdiaz4438 Жыл бұрын
👍
@cosmic_husky9 жыл бұрын
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
@naveengupta212 Жыл бұрын
Superb explanation, prof. Scientific findings with historical background. A great way to engage the class.
@aldritch_lol4 жыл бұрын
This professor kinda sounds like Heath Ledger's Joker lol
@BoyanSotirov Жыл бұрын
What a great lecture indeed!
@MohamedElsheikh2211 жыл бұрын
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
@manuelillanes16355 жыл бұрын
is that old course still up?
@KakashiChidori6165 жыл бұрын
watch NPTEL (IIT Delhi)analog communication lectures by Prof Surendra Prasad.he is absolute gold.
@sunnyboy8665 жыл бұрын
A great tutor with awesome explanations. Thanks for the lecture
@soufianefariss7 жыл бұрын
DAMN!May the gods bless him
@Moonsabie11 жыл бұрын
loved his instruction very social
@jarrodanderson21243 жыл бұрын
Excellent lecture from a brilliant sprite ❤
@hmopa8 жыл бұрын
thank you for the lecture .
@maxflix967 жыл бұрын
I like that they use the metric system :)
@abelashenafi62917 жыл бұрын
thanks for the lecture
@TheAhmedMAhmed10 жыл бұрын
great lecture, thanks!
@waspenxgmail2 жыл бұрын
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.
@JuliaLing3 жыл бұрын
Really enjoyed this! Thank you!
@hacihocni61564 жыл бұрын
Thank you
@joelc.corbin29955 ай бұрын
Modulation (Part 2) is missing from the playlist, but is available on the mit website.
@mitocw4 ай бұрын
Just checked the MIT OCW playlist and it's there. Maybe you are using a different playlist? MIT OCW's playlist: kzbin.info/aero/PLUl4u3cNGP61kdPAOC7CzFjJZ8f1eMUxs. Best wishes on your studies!
@motjones2341 Жыл бұрын
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.
@Ironbonekorea5 жыл бұрын
thanks for awesome lecture!
@ayanmosh10 жыл бұрын
Pardon my ignorance, but doesn't e^(-jwt) = cos(wt)-jsin(wt)? instead of cos+isin?
@dhanamkoilraj96087 жыл бұрын
I think it has something to do with split complex number. Just google it,
@mattpopovich5 жыл бұрын
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).
@hemantabrahma74945 жыл бұрын
very nice lecture.
@SeverSpanulescu3 жыл бұрын
Actually, the antenna length should be lamda/4 or lambda/2.
@jonahansen Жыл бұрын
True, but the point is still valid.
@PeterPinch11 жыл бұрын
What are your expecting to get from MIT OpenCourseWare, if not videos like this? Or is the problem the volume?
@Er.Sunil.Pedgaonkar Жыл бұрын
Good
@PrinceSingh-vo3gp9 жыл бұрын
nice lacture
@sonjak82654 жыл бұрын
Tesla was the inventor of radio.
@jonahansen Жыл бұрын
Uh, no.
@BillyBonin8 жыл бұрын
Professor Frink!!
@felixdiaz4438 Жыл бұрын
👌
@plan10111 жыл бұрын
I will be leaving now
@jonahansen Жыл бұрын
It's OK to praise the Lord!
@corblaak80518 жыл бұрын
His modulation is hot hahah
@JackLe11278 жыл бұрын
he can modulate me anytime
@cyrilbatolo26566 жыл бұрын
how do you choose R and C value in the circuit?
@jonahansen Жыл бұрын
Just a low pass filter so the corner is about at the highest signal frequency needed: f = 1/ (2*pi*R*C)
@joeblow49385 жыл бұрын
when a teacher asks the class questions over and over again and no one can answer it, means you suck at teaching the material
@AllenAndersonTaylor5 жыл бұрын
He's kind of smug.
@Mikehibbett Жыл бұрын
I don't think the lecturer is in touch with his students... Brilliant person, not a great teacher
@plan10111 жыл бұрын
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.
@theodorechandra84506 жыл бұрын
I'm sorry, but how would modulation be used in business?
@migkillerphantom5 жыл бұрын
get a load of this nigga tryna sound smart before even learning to english lmao
@jeffcard36234 жыл бұрын
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.
@plan101 Жыл бұрын
The field of study is a particular approach in the academe