This prof is Robert G. Gallager, the inventor of LDPC codes used in Wifi, Dvds and more recently 5G communication system. This blew my mind! The things I am gonna learn are made by this gentleman itself. This shows why MIT is the top institute in the world.
I was watching random videos on youtube and wasting my time replying to abusive comments. Then I realized, being a digital communications engineer, why not search related videos. I found M.I.T videos for free. This is what resurrection feels like. Internet CAN be very good too. Depends on how you spend time with it. Thank you MIT :)
I'd been watching the series of thos videos in 2009 for studies purpose when I was working on Reed-Muller codes. And now, after 7 years, when I started working on LDPC codes, I realize that this guy is the father of LDPC codes. What an ignorant am I !!!! Thanks a lot Professor Robert Gallager. All my respects.
Online Education can become extremely boring. We miss the teachers, the tone of voice, the body language. And also those stories that good teachers share with their students. But thanks God for these on-line lectures. They are awesome!
Really good stuff, if you already have a good background on the subject, which is the target audience of the lectures. Otherwise, I recommend you to first take a look at some of the other ocw materials such as linear algebra, signals and systems, and random processes.
@donnyab Yes! Indeed. This is a fairly advanced subject which generally isn't gotten to until one's senior year of university or more often in a master's program. If you want to be prepared to understand it all, you'll need to be able to understand all of those prior subjects. One can always watch the videos and do their best, but if you're going to put in the work, you may as well put in the work.
while there are great teachers like the ones at mit and good ones like yourself, in India there are just plain crappy, shitty teachers who don't give two shits about generating students interest in the topic. They bring in some 1980's bunch of shit notes they had written and encourage rote-learning. Whats even more interesting is that my classmates all just jump right into the "who can rote learn the most without understanding a damn thing" competition and I'm just plain sad at how potential is wasted in my country due to its crap education system. You try to teach from the best, good for you !
Actual understanding without of the obfuscating fussy-stuff; that is, both feet on ground, clear vision as is to what is what and why. Actually useful, applicable. Thank you, thank, you, and thank you MIT. Also, I would credit the excellent professor presenter but I can't find his name; still, that particular person, thank you, sir.
We glad this lecture helped you! Thanks for the shoutout. :D The Professor's name is Robert Gallager. More info and materials for the course can be seen at MIT OpenCourseWare at ocw.mit.edu/6-450F06.
He was right. Rapid evolution in the telecommunications industry. Gone are GSM, TDMA, CDMA and HSPA. Now, LTE is on the chopping block in the next several years as 5G NR is fully deployed.
You should try working your way through Oppenheim/Wilsky's Signals & Systems and something like John G. Proakis' Digital Signal Processing as preparation to this course. Berkeley has some good video lectures on the Signals and Systems stuff. Having a good background in Probability Theory will be helpful as well.
Too late, a decade, to this channel :) Watched only 25 mins n i got 2 thinkin bout his statemt "channel does not know what it's transmitting". Back in the days of Telegram and Postal-messages, the messenger knew the message and announced it to the recipient (Happy B'day). Telegraph operators too knew the reason for the calls...what a contrast to the modern day communications. Thought I'd share :)
23:29-23:41 "When you talk about information theory, it's a total misnomer from the beginning. Information theory does not deal with information at all. It deals with data." Thank you!! That made my day. I've been saying exactly that for years, and wondering all the while why this crucial distinction is mentioned nowhere, EXCEPT on the very first page of Shannon's famous technical paper, which nobody reads. Physicists in particular have a way of sailing right past the data/information distinction, presumably because they are smarter than everyone else (true, I don't deny that they are) and so they feel that they needn't ever slow down to wonder if perhaps they aren't spouting very clever but very idiotic nonsense, e.g., about 'the information in a black hole'.
@@marinvorspier7528 Hi. I was referring to his paper called 'The Mathematical Theory of [data] Communication' (1949), which started out as a technical paper inside Bell Labs in 1948. I put '[data]' in the title to emphasize that his paper is NOT about 'information'! As a small paperback book, look for C.E. Shannon, W. Weaver, The Mathematical Theory of Communication, University of Illinois Press, 1963. Shannon's paper appears on pp. 31-125 of that volume. On the very first page of his paper (p. 31), he says, "These semantic aspects of communication are irrelevant to the engineering problem." In other words, he is trying to warn the reader that the paper is about the low-level technical details of data communication, not about 'high-level' information stuff. But for 70 years, people have been ignoring his warning and instead have promoted the fairy-tale that there exists "a theory of information" devised "by Shannon." There is no such theory.
"If you design a system and you don't see in your mind how the whole thing works, you will end up with something like Microsoft Word. And that's the truth!"
it would be great to have subtitles with these amazing lectures! is that in the plan? it would be very useful for me because of my bad english. it is much easier with subtitles. just transcript (without synchronization) would be enough for me! thank you anyway!
I still dont get the part where he said "theoretists state that 2^100 nos would be evenly spaced and between the values of 0 and 1"Wont the values be exactly zeros and ones and not decimal points?
167k views. Let's assume a student watches 1-2 times this videos, and the median view count is 1.3~1.7 . We then have 100~130 thousand aspiring telecommunications engineers. Let's say there is a tough estimation of 100~5000 big telecom companies out there. Each one must take in around 20~10,000 telecom employees , just from the statistical pool that watched this video, in order for everyone to succeed... Talk about competition, huh?
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I would like to be able to follow this course, but am a bit worried about the prerequisites. Does anyone know of a good course I could take a look at to be ready for this one?
