FHSS - Frequency Hopping Spread Spectrum

5 років тому

In 802.11 standards, three different modulation/transmission methods are used to transmit wireless signals: 1) Frequency Hopping Spread Spectrum, or FHSS; 2) Direct Sequence Spread Spectrum, or DSSS, and 3) Orthogonal Frequency Division Multiplexing, or OFDM.
These techniques are used for several reasons, including the reduction of natural interference, noise and jamming, and prevention of detection and interception.
In this lesson, I will focus on one of spread spectrum modulation methods used in wireless communications: Frequency-Hopping Spread Spectrum, or FHSS.
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КОМЕНТАРІ: 170

@sadunkumara3699 4 роки тому

My lecturer took two hours to explain this simple thing. Thank you. May u live long

@pattty847 2 роки тому

why can't youtube offer degrees?

@oUtLawMaNia 3 роки тому

The most underrated lecturer on the internet! You put things into perspectives that are so easy to grasp, thank you very much!

@larryshulman8845 3 роки тому

excellent video series, probably one of the best I have ever seen , clear, imaging based, understandable for an old engineer like me that responds to visuals first and math 2nd.

@talismanicac 2 роки тому

The simplest and easy to understand concept of DSSS & FHSS by you on youtube. ♥️

@silverbell6160 3 роки тому

I love your explanations, they are so clear and simple. Great!

@NerdyDumbProductions 5 років тому

Thank you again Sunny, love your lectures :)

@gabodiaz984 3 роки тому

Please Teacher Sunny !!!! Dont stop to make videos . These are really easy and interesting to get them

@sunnyclassroom24 3 роки тому

Thank you for supporting !

@Anonymous-ed4id Рік тому

This is so beautifully explained!

@sharvind8852 Рік тому

Thank you so much for this very simple explanation.

@danielbradley753 3 роки тому

This is great, your voice is very clear and concise through the video and the explanation seems obvious 🎉 Just why I need

@sunnyclassroom24 3 роки тому

Great to hear!

@fabricegosnet9569 4 роки тому

Very well explained, good job and thank you!

@RaviKumar-mf8kk 4 роки тому

Thank you very much for the simplification in such a short and nice video.

@sunnyclassroom24 4 роки тому

You re welcome !

@vighneshnayaks7379 3 роки тому

Thanks a lot, got to know FHSS at superficial level, and did better job than my lecturer.

@austrian.painter 2 роки тому

I Love It When The Notification Comes, "Someone Has Subscribed Your Channel" 😁 It Always Makes My Day!

@stevenshakes978 2 роки тому

Thank you Sunny!

@mariodelzo 3 роки тому

Thank you so much, I was reading a whole book for many hours, but with this video I just take 5 minutes to ilustrate the ideas very clear and summarize. Hope find more videos of other topics with this didactic , well done!!

@sunnyclassroom24 3 роки тому

Wonderful!

@JimK0QJC 2 роки тому

Very good. Your graphics are excellent. Thank you.

@javierlujan9249 5 років тому

Thank you for your easy explanation, this is really helping me a lot, thank you sir

@sunnyclassroom24 5 років тому

You are very welcome!

@MrNandu32 Рік тому

Great information about the FH.

@jakubadamczewski3477 5 років тому

Another amazing video, thank You!

@dennisasamoah2213 3 роки тому

wonderful as always

@kenjboyd6233 Рік тому

Thanks for making this clear!

@aitbouslamkarima2687 2 роки тому

Thank you very much for the simplification

@etcher-lf6972 Рік тому

Looks so clear now Thank youuuu

@rvscootin3457 3 роки тому

Excellent example - Thanks!

@arunbabu7856 Рік тому

Clear and simple 👍

@RagibShahariar 3 роки тому

I wish you had released these videos in my undergrad -_- God bless.

@mohammedmuddassir7170 2 роки тому

Excellent explanation..

@antoniopintus8568 3 роки тому

Just great! thank you very much for sharing those classes! top!!!

@sunnyclassroom24 3 роки тому

My pleasure!

@isaiah_polocity2516 2 роки тому

Very simple explanation.. thank you so much

@fernandoaaff 3 роки тому

Excellent video! I can't thank you enough

@rasswanth4968 5 років тому

Good Lecture Sir.

@Onvervain__ 2 роки тому

Very easily explained 🔥

@beTrollakod00 3 роки тому

Clear and simple. Thank you!

@sunnyclassroom24 3 роки тому

You're welcome!

@midhunmadhavan7402 4 роки тому

Nice Explanation THANK YOU

@electronicprojecttutorial 4 роки тому

Very clear explanation!

@7800X3D 4 роки тому

Thank you for making it easy

@brunatogomes1627 3 роки тому

the best expanations i have ever seen

@AkashMuralidharan 11 місяців тому

Thank you sunny sir🙏🏻

@cokeforever 3 роки тому

Good video, great teching skills!

@alicegeorge8757 11 місяців тому

Thank you, that was very helpful!

@violinvvv 2 роки тому

Very clear, thank you

@NaqeebAl 3 роки тому

Thank you Sunny, some of the best explanations on UKposts. It's clear that you spend time and care in making the animations for these videos and it's nice to see the tens of thousands of people who benefit from them.

@sunnyclassroom24 3 роки тому

Wow, thanks! That is my passion to do .

@heritagerunner-mubarakmand1605 4 роки тому

Great video Sunny. Keep it up!

@sunnyclassroom24 4 роки тому

Thank you for watching!

@joutiarghaderyan404 3 роки тому

Just a simple correction here. The time that you mentioned as the Hop time is the Dwell time. The Hop time is the amount of time needed to move from one frequency to another, which does not exist in your graph.

@abhilashbs1021 5 років тому

Good lecture 🙌🙌

@mohsenmazandarani7506 Рік тому

Thank you.....Perfect

@rasydanghani6995 5 років тому

Very well explained..thank you very much!

@sunnyclassroom24 5 років тому

you are welcome!

@geekmuralin 2 роки тому

Thank you sir 🙏

@sarangkottummal5463 2 роки тому

you are the best!

@user-mh7vz7xf4w 6 місяців тому

Thanks to you! I understood it very well :D

@krishamehta8789 3 роки тому

This was helpful. Thanks

@aaaaa2332 5 років тому

Hello sunny it was a really nice lecture. Short and sweet. Please make a video on ofdm

@sunnyclassroom24 5 років тому

I will. It is on my to-do-list. I will upload it soon, hopefully.

@aaaaa2332 5 років тому

@@sunnyclassroom24 thanks for your quick response.

@sunnyclassroom24 5 років тому

No problem. I normally answer within 24 hours unless I travel or business trip.

@sunnyclassroom24 5 років тому

OFDM - Orthogonal Frequency Division Multiplexing I do not know if you watched it on my channel.

@cenkcaba5757 2 роки тому

thank you so much. very nice

@ShikshaThisSide 5 років тому

Wao very well explained . thank-you soooooo much.

@sunnyclassroom24 5 років тому

You are very very welcome!

@aswiniv6428 Рік тому

very nice, thank you so much sir

@simi7701 3 роки тому

congrats for your 100k subscriber!

@rohailmohmand502 Рік тому

You put the whole sea in a single glass. That’s magnificent

@aneupan 4 роки тому

Very well explained. I liked that you videos are short, but at the same time very detailed. You've earned a subscriber. And, please make the future videos shorter too. Thank you.

@sunnyclassroom24 4 роки тому

Thank you ! you made my day!

@mdabulkasem2053 5 років тому

Nice tutorial, thanks a lot

@sunnyclassroom24 5 років тому

You are welcome.

@mayurgare 3 роки тому

Thank You Sir.

@sunnyclassroom24 3 роки тому

You are most welcome

@rohullahhussaini3351 4 роки тому

thanks Sunny, you're awesome

@sunnyclassroom24 4 роки тому

Thanks a lot.

@slickrgl 3 роки тому

Hedy Lamarr sent me here. Amazing invention. 👌

@sunnyclassroom24 3 роки тому

Thank you for watching!

@arunwuppuluri 5 років тому

Nice one Sunny !!

@sunnyclassroom24 5 років тому

Thanks a lot.

@girikgarg1268 2 роки тому

Nice video!

@natsagnyamnamkhai749 4 роки тому

super well done

@sunnyclassroom24 4 роки тому

Thanks

@iam_saturn 3 роки тому

Very helpful ...thankyou

@sunnyclassroom24 3 роки тому

My pleasure 😊

@vitojosephjoestar3653 2 роки тому

you're my hero

@arjunarvind2178 3 роки тому

nicely explained

@sunnyclassroom24 3 роки тому

Thank you 😃

@bingbingsun6304 2 роки тому

Very clear explanation, subscirbed.

@flywithtb5005 3 роки тому

Whats nice about non-native english speakers is that they speak simple to understand sentences and don't use informal speech. And that actually makes it easier for non-native speakers to understand.

@godlessmankind4142 5 років тому

Amazing thanks

@sunnyclassroom24 5 років тому

You are welcome!

@tanmoydutta5846 3 роки тому

Btw, nice and short lecture to explain the concept..... good job

@sunnyclassroom24 3 роки тому

It's my pleasure

@jamesalmaw9256 5 років тому

MY HERO !!

@lahirureshanwanniachchi9065 4 роки тому

Nice tutorial

@sunnyclassroom24 4 роки тому

Thank you!

@gaurideshpande1844 4 роки тому

very nice sir!

@sunnyclassroom24 4 роки тому

Thanks a lot.

@CHAN-xn9eq Рік тому

🔥🔥🔥🔥🔥

@user-cm9qb4xy7c 5 років тому

Thnx ...sir...

@gerardscheffer8848 4 роки тому

Very helpfull thnx!

@sunnyclassroom24 4 роки тому

You are welcome.

@tuxuday 5 років тому

How a packet once sent by the sender, can hop to different frequency before reaching the receiver? Changing frequency requires energy! So i reckon once a packet is sent it will be in the same frequency. Maybe the next packet will be in different frequency.

@mortenlund1418 4 роки тому

He means the packet is divided and send partly on the different channels.

@juanwallace3053 3 роки тому

@@mortenlund1418 Thank you!

@burakbbilgin 5 років тому

perfect.

@sunnyclassroom24 5 років тому

Thanks a lot.

@shreyaovalekar6764 5 років тому

Thank u

@puneetkour9327 4 роки тому

Very cute lecture

@sunnyclassroom24 4 роки тому

Thanks.

@sahitikandukuri340 5 років тому

thank u soo much

@sunnyclassroom24 5 років тому

You are welcome!

@gladiamissan84 5 років тому

Thanks too explicite

@sunnyclassroom24 5 років тому

you are welcome!

@Cyberfako 4 роки тому

I would like to ask how reciever know the changed frequency ? Reciever listen depends on what in this protocol ?

@mattlane1573 3 роки тому

Your videos are great as always and your my go to UKpostsr. Having watched some of your videos about Wi-Fi i'm a bit confused now, how do the channels of 1 6 and 11 fit into all of this?

@sunnyclassroom24 3 роки тому

It is beyond networking basic understanding. I wish I could be able to explain.

@nilshrestha9147 2 роки тому

i think the data packet doesnot jump to another frequency in the middle of transmission,instead i think the user data packets are send in a certain sequence using the various small channels ,and through which channel it will go is already decided before sending

@maxheadrom3088 Рік тому

One question: the packages change frequencies or the sender and receiver change the frequency used for each package? I mean, a package sent in F2 will always travel in F2 but the next package will be sent through F5 and so on. Thanks!

@hafissafwan 4 роки тому

Good explanation better use 1.25 speed while watching

@sunnyclassroom24 4 роки тому

Thank you for supporting!

@needsomehike 4 роки тому

is it used today in our wireless 2.4-5 GHz wireless networks?

@Yasar4ever Рік тому

Dear Sunny, please upload more video regarding the wireless concepts (i.e CWNA)

@cheelikumar 3 роки тому

great work SUNNY SIR.Make video on INTER SYMBOL INTERFERENCEI,EYE PATTERN ....

@Toto-cm5ux 9 місяців тому

Very interesting but how does the receiver know the hopping-pattern in FHSS WiFi technology ?

@aniketkale449 3 роки тому

Sir what if two different signals land on the same channel at the same time. For example, signal S1 and another one S2 use the same channel F2 at the same time T3.

@bhuvaraga 3 роки тому

Question: How does the receiver know what pattern is used for this transmission? Is it first sent and agreed before transmission?

@jeffreydijkstra3391 3 роки тому

Both receiver and sender have a predifined hopping sequence not knows by other devices

@anandprakash9457 Рік тому

Sunny Sir, what if the eavesdropper is listening on all the 79 channels ?

@mortenlund1418 4 роки тому

I see this is a security benefit, but is it also benefitting regarding interferrence? That I dont see?

@sunnyclassroom24 4 роки тому

because there is a pattern in hopping, and noise or other interference do not have a pattern. When the receiver gets the signals, they can retrieve original signals and get rid of noises.