OFDM - Orthogonal Frequency Division Multiplexing

[@anonymitydeclared3685]

Is this magic? You just explained the same concept my professor explained, but he took an hour and you took only 4 mins. I am thoroughly impressed.

[@Abcadeaz]

I'm actually kind of emotional/angry over the time wasted through my 'plain english' course material to explain this concept 10% as well as Sunny, a man with a self proclaimed 'Chinglish Accent' I don't know, maybe they need to start writing textbooks with 'Chinglish Accents'

[@samlewis4195]

Yeah, Sunny explains everything in an easy way to follow. I'm hooked on his videos for school.

[@blatogh1277]

See, some professor need to learn some new lessons now

[@grayshadow2597]

Many professor knows a lot about what they teach, but the problem is that they do not know how to teach well.

[@lukesymonds4550]

Me too very simple to understand

[@moacirg]

Fast, simple and effective explanation. His teaching method is perfect. His spoken English with pauses makes it easy to understand. You have gained a follower from Brazil.

[@sunnyclassroom24]

Thank you for your comments!

[@osmantokluoglu]

I agree. From Turkey as well...

[@4ndrevideos]

Agree.

[@matheuspinheiro65]

verdade, essas vídeo aulas são muito boas

[@perfectpakka8151]

God-Level Definition of OFDM! Helped me a lot for my exams... Thank you, sir... Love from India

[@GauravSingh-cs6he]

Please keep on delivering your great lecture on wireless communication! thank you.

[@sunnyclassroom24]

I will do, sir.

[@Zain15a]

The concept of Orthogonality, (avoiding interference by other signals nulling) was the best I have seen so far. So easy to understand. Thank you!

[@暴走初號機]

This is the most clear explain of orthogonal I have ever seen.

[@parikshithk8289]

Ur teaching makes our learning journey joyful

[@magedrefat1658]

The best video I have watched regarding FDM and OFDM. I really appreciate your efforts :-)

[@sunnyclassroom24]

Happy to hear that!

[@varadybalint3658]

Oh my god you have just explaimed it better in 3 and a half minutes than our professor in a whole semester

[@creativeworx47]

I have a Wireless Networks today, and I have been struggling to understand how OFDM, your video got me strait to the point. Thank you so much😊

[@sairohith9793]

How can someone unlike this wonderful lecture on OFDM :< ....A very insightful and clear-cut explanation of OFDM has been provided , I loved it ! Thank you :)

[@sanjeevKumar-eg6hp]

one of the best videos on OFDM explained it so beautifully that its impossible not to understand Thank you so much sir for sharing your knowledge in such an awesome manner

[@sunnyclassroom24]

You are welcome. Thanks a lot for your nice comment.

[@dirknp3101]

True but its also very simplified. nevertheless a great video

[@wildarguelles1947]

Holy ..... Thank you! I have been searching for an easy lectures like this!

[@mike34856]

Thanks Sunny, your videos assisted me in passing CompTIA A+ and Network+ :)

[@marvinmarvo]

Very crisp and concise explanation.

[@mavic6155]

I have seen many video's about physical layer information, but this one is easiest to understand. Keep on going!

[@sunnyclassroom24]

thanks a lot for your encouragement.

[@thezombieguy426]

Best video for overview of what OFDM does, Simple And Short Thank you Mr. Sunny 🌞

[@sunnyclassroom24]

Thanks !

[@randomgamerbuddy6719]

The way you explain this topic is brilliant. Hoping to see more of your lectures

[@sunnyclassroom24]

More to come!

[@sachureedas]

Are you kidding me!! Why has no one ever thought of explaining this topic like this. So easy to understand!!!!!

[@geethikasrimuktha5482]

I'm disappointed that there is only one like button for this video. It was precise and so easy to understand. Thank you very much!

[@riturajsinghrawat4487]

The concept you started at 03:00 is by far the easiest explanation every other teacher could not achieved.

[@Sagachel]

Really good video, very well explained, hope you continue realeasing videos 4ever. Thank you !

[@sunnyclassroom24]

That's the plan!

[@jesse3826]

Going in for a Verizon interview, and haven't been in tech for over a decade. I'm honestly trying to find jobs that can satisfy my level of tech knowledge without a degree. As an amateur radio operator, thanks for this. You just got a subscriber!

[@paulpeckham8369]

By far the simplest way I've hear it put. Thank you.

[@sunnyclassroom24]

Thank you very much for your nice comment. I will do my best.

[@mbaykal26]

I have seen such an simple and effective explanation for OFDM and after watching this video I have grasped the idea OFDM for the first time, thank you so much!

[@alyaaali1697]

I have never commented on any video on u tube but i wrote this one to tell you how much grateful i am thanks a lot Mr. Sunny you did a great job

[@sunnyclassroom24]

Thanks a lot for your nice comment.

[@sunnyclassroom24]

Thanks a lot for your comment and you are welcome!

[@jakubadamczewski3477]

Your work is very valuable. You are great teacher, thanks!

[@sunnyclassroom24]

Thank you very much for saying so. You are welcome!

[@bhavya2301]

Explanation can't be better than this. Thank you🌞

[@sunnyclassroom24]

So nice of you

[@tlmalcolm21]

Such a simple way of explaining a difficult topic that others spent hours on and still didn't understand. Thank you so very much Sunny.

[@ElreyRayo]

Beautiful explanation! short,simple & concise.... I would like to shake your hand Sir.

[@sunnyclassroom24]

Thanks for your positive feedback!

[@melleniumster]

A very concrete, concise and clear explanation! Nice Job ...

[@sunnyclassroom24]

Thank you for your comments!

[@stevez4229]

Thank you. Clear description of FDM and OFDM and the advantage of the later over former.

[@igorstrelkov4624]

Simple, yet complete explanation. Thank you !!!

[@sunnyclassroom24]

you are welcome!

[@muftaract]

This is one of the best lectures I've seen and heard so far. Thanks for the clear and distinct explanation.

[@sunnyclassroom24]

You are welcome!

[@vanyatahir3698]

very helpful, for beginners and for experts thank you

[@subhampanda8343]

such a perfect and crisp explanation. Many research papers and video lectures yet fail to explain how the subcarriers are orthogonal to each other.

[@1000left]

You are the best teacher I've EVER had!!!! Thank you!!!!

[@sunnyclassroom24]

Thank you very much for your kind words.

[@logicawe]

This content format has a lot of potential. Thank you for the content.

[@sunnyclassroom24]

You are welcome!

[@chel1128]

Sunny you always save me from the complex ideas with clear visualization and very concise explanation on the key words!!!!! cant thank you more !

[@khalos458]

thank s sir it s amazing the way you can make easy complicated concepts .you gained an other follower from france

[@sunnyclassroom24]

You are welcome! Thank you for your time!

[@francohernandezcruz6877]

Clean and simple explanation. Thank you Sunny, keep on with the information. Greetings from México

[@sunnyclassroom24]

Glad it was helpful!

[@LS-df5fe]

Without a doubt, the best explanation I have seen, and in such a short video. Congratulations Sunny.

[@97131ful]

Such a crisp and clear overview of OFDM, Thank You :)

[@sunnyclassroom24]

Glad it was helpful!

[@sep-16vaibhav73]

Best explanation in such a short time.🙏🙏

[@sunnyclassroom24]

Glad to hear that

[@irinsultanabristy3896]

Hi, your explanation is very much easy, simple, and convenient. I appreciate it.

[@iammayurn]

Thank you so much, that was so helpful to me. I will never forget now.

[@xmengao0922]

Very intuitive way of explaining OFDM, thanks Sunny!

[@sunnyclassroom24]

Thanks a lot for your comment and you are welcome!

[@mohammadqz8956]

the best explanation I found so far!

[@sunnyclassroom24]

Happy to hear that!

[@sundharkumar5203]

Well said!!👏🏻👏🏻and easy to understand 👍🏻👍🏻

[@scottgage9541]

Great explanation of OFDM. Keep up the good work.

[@asthasharma8770]

Thank you for explaining in a such simple manner with effective animation usage. Have subscribed to learn more.

[@sunnyclassroom24]

Thanks for the sub!

[@taapaskapoor5042]

Very Nicely Explained. Was struggling with radio topic of 5G communication certification of mine but this explanation has done wonders to my understanding.

[@sunnyclassroom24]

Thank you for watching!

[@haq-a-haq6447]

very usfl and simple way of explaining a complex technique of multiplexing

[@anilauece]

This is very good explanation. Clears my doubt(Comparing FDM with OFDM) which i am having it for many years.. Thanks a lot sir.

[@sunnyclassroom24]

you are welcome!

[@alexdelarge1508]

after ten years of university, i finally understood orthogonal signals with a 4 minutes video. you're great!

[@DelsonFilho01]

Thank you very much for OFDM video! I'm from Rio de Janeiro, Brasil.

[@sunnyclassroom24]

You are welcome! I have one friend from Rio De Janeiro, Brazil, now I have two now :)

[@DelsonFilho01]

@@sunnyclassroom24 I like very much your lesson! It help me enough in my dificulties in this thema. Thank for your cooperation!

[@sunnyclassroom24]

@@DelsonFilho01 You are quite welcome!

[@rahulkhedkar9829]

very helpful! explained in simple words. Thankyou!

[@sunnyclassroom24]

Glad it was helpful!

[@航杨-u4u]

Thank you.Your teaching style is clear and easy to understand.

[@osmankhalid2005]

For the first time, I understood what is meant by orthogonal... beautifully explained.

[@Ol-T1864]

Thank you sir, I appreciate the explanation. My course didn't explain it well enough to sink in. Making it look easy sir!

[@se2702]

Sunny is the BEST at explaining these topics! Thanks again Sunny!

[@manichandana5147]

Easily understandable explanation , Thankyou

[@sunnyclassroom24]

Glad it helped!

[@ShivAdiShakti108]

Dear Sunny, Commendable Video with excellent explanation. Keep up the good work!

[@emp7y]

Very effecting explanation, thank you!!!

[@sunnyclassroom24]

Glad it was helpful!

[@chetandurgavale5623]

I have learnt a lot from your Videos. Informative, Precise and easy to understand.

[@frederickafrihyia6256]

Awesome! Thanks, Sir!

[@jacobnoakes8635]

Super great explanation! Am studying for my CISSP and was having trouble grasping what was meant by ofdm. This cleared it up for me right away.

[@securednetworxx]

Loads of people obtain PhD's and Master's on the subject matter but not loads has the capability and quality of teaching the subject matter.😆

[@BaSsLoVer2o11]

Great. Just great explanation. Fun Fact: Im german. My german professor could not explain OFDM properly, so no one in class really understoods. And then im watching a video made by an non nativ english speaker but still understand OFDM better than in my class. Very good work indeed. :)

[@securednetworxx]

SUNNY RULES! I'm having confusion with how others deliver the subject matter knows where to pause so anyone can digest the entertwined information in the brain. SUNNY can just squeezed the main points in 4mins.

[@sabit648]

no better way than this....sir u literllay cleared my all doubts

[@sunnyclassroom24]

Thanks you for watching!

[@jeribullitt2432]

Awesome!!!!!! Fast, Succinct, and and to the point!

[@An_Attempt]

Thanks Very Much, you have helped my exam prep immensely on three different topics, OFDM, DSSS, and FHSS.

[@heirflowcybersecurity8641]

Hi Sunny, I really enjoy learning from your thorough and concise explanations. You have helped me significantly! Thank you for your contributions!

[@rosezuk1889]

Best description i have ever heard, thankyou.

[@sunnyclassroom24]

Wow, thank you!

[@SilviaPaolaHerrera]

wonderfully explained!!!! 💫 you are the best

[@propolis29]

Hi, thanks for your work. It's a very good method. New subscriber from Moldova

[@sunnyclassroom24]

Thanks for the sub!

[@fangtongzhou1014]

Hi Mr.Sunny, I am a Chinese student, I found this video fascinating, clear and concise. However, with Chinese network condition, students in China couldn’t log in or access to www.youtube.com, I really want to bring this video to www.bilibili.com, a Chinese like-youtube website, so that more Chinese students could see it and I believe it will totally help them understand this part of knowledge. I will note the origin source of the video and it won’t be used as any commercial application.

[@sunnyclassroom24]

cool. thank you for your suggestion!

[@iGetPuddy]

I used to work at Qualcomm, and I never understood CDMA. I still don't really, and I wish you were around back in those days! Thats a great explanation of a quite complex technology.

[@shahidafsar7912]

Hi Mr. Sunny, You are great teacher. You have stunning way of delivering the content. This is amazing that how you can put a complex topic into simplest form to understand. Many thanks for your effort and dedication! Shahid from Canada

[@tarekamami460]

What a great job, thank you Sunny.

[@maxwellchiu6859]

Excellent lesson. I've read other descriptions of OFDM but this is the first one that actually makes sense. Kudos, Sunny.

[@diyardler97]

Outstanding lecture! this was the best explanation for OFDM.

[@sunnyclassroom24]

Glad you liked it

[@MooBlondie]

Thank you so much for this video. It helped me a lot.

[@sunnyclassroom24]

You're welcome!

[@mubiale4060]

Very clear explanation, Thanks

[@sunnyclassroom24]

you are welcome, Mubiale.

[@Eightminutesengineering]

very good utilization of colors and graphics

[@laocruz5462]

Thank you sunny!!!

[@sunnyclassroom24]

you are welcome!

[@saikirank7941]

Easy understanding lecture. thank you

[@sunnyclassroom24]

Glad to hear that!

[@rashadismail2355]

Thank You for the Best Explaining.

[@alessandrastellacaporale5256]

Very clear, thank you!

[@sunnyclassroom24]

Great to hear!

[@alexb3648]

Great video! I like the teaching style. Please make a video that explains why/how people use IFFT and FFT in OFDM! I am very confused on this topic.

[@ShuxiangSun123]

I put your topic on my to do list.

[@syedsahab4883]

so nice way to describe ofdm

[@sunnyclassroom24]

Thank you very much for your kind comment. Happy 2019 Year!

[@rahatpreo3209]

Best explanation . Thank you

[@sunnyclassroom24]

You are welcome

[@armandosciascia]

Wow the way you explain OFDM is very creal and understandable. Contratulation and thank you.

[@darshansrinivas6883]

Very Effective teaching Thank you

[@yhoelvicentechavezalderete4090]

Fast and simple, excellent explanation. Thank you!

[@dhirajkumarsahu999]

A very simple and clear explanation ...Thank you, sir!!!

[@sunnyclassroom24]

You are welcome!

[@adrianaabril85]

Wow you made it so easy to understand!!! Greetings from Ecuador

[@sunnyclassroom24]

Thanks a lot.

[@abhishekarakcreations6837]

Best Explanation ❤️❤️❤️👌🏻.. From the best teacher ever ❤️❤️❤️

[@mouctechy]

very, very and very clear sir, for the first time I have exactly understandood the concept of orthogonality

[@thomasmaughan4798]

It would help if your charts indicated the axis. Combining three sine wave signals that are in the time domain into a single chart that appears to be in the frequency domain is not obvious how that happened. It seems to be missing an explanation of modulating a carrier with a sine wave produces sidebands. A steady modulation produces exactly two, well defined sidebands above and below the carrier. But modulating the modulator signal, either by changing phase or frequency, creates a complex family of sidebands and when all these sidebands mix in the receiver, the original modulation is reconstructed. So you cannot just eliminate these sidebands. What you want to avoid is placing a sideband smack dab in the middle of an adjacent subcarrier. As it happens, these sidebands are predictable as to frequency separation in the frequency domain. The sideband spacing (in the frequency domain) is dependent upon the symbol rate. So, if the subcarrier frequency is an integral multiple of the symbol rate, the sidebands will line up and so will their nulls (in the frequency domain). In the time domain it is nearly white noise after many subcarriers are created and summed. At the receiver, the entire passband (now in the time domain) is fed into FFT and out pops the coefficients (sine, cosine) reconstructing the many subcarriers and now in the frequency domain. These can then be separated out from each other and further processed to recover the specific modulation technique used. Or so it seems to me. The importance of orthogonality is that the reconstructed subcarriers will have nothing of their immediate neighbors sidebands; but might still have much weaker more distant sidebands that can be ignored (below a threshold).

[@lokmankhene144]

Very simple and helpful🙏🙏

[@sunnyclassroom24]

thanks a lot.