Understanding Spectrum! | ICT #6
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- Опубліковано 8 лют 2025
- Use of the Internet on the go, or when making mobile phone calls, is made possible thanks to the invisible electromagnetic waves that mobile phones emit or receive. However, did you know that this electromagnetic frequency range, or spectrum, is a highly precious resource. In 2008 the US government made a whopping $19 billion through a spectrum auction. In this video we will look at the scientific reasons why this invisible electromagnetic frequency range is such a valuable resource.
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If in a cell or one BTS , multiple users are using 3G technolgies then what happens, any collisions, interference, leakage of data
hey man love these videos -- any way you can add a paypal link also so those of us that don't wanna get another subscription to keep track of can also donate? thanks for your work.
Yes it hurts very much posting online.. urgency is needed. No one is above The Law constitution for all freedom for All..
😂😂😂😂 0:18
😂😂😂😂😂 0:18
People making fun of the video do not see the value in such knowledge, available free for everyone on internet. Hats off to Learn Engineering for the content
totally agree brother!!
Me to also
that delicious easy browny point
Wrong claims is not valuable at all. There is nothing to be learnt from this video.
Yes they do see the value. That's why they watch it.
Whoever did the 3D is the reason why i enjoy all of these videos.
How can I do a video like this? I'm interested because I would like to integrate it to my lessons. I'm a high school teacher.
@@EmperorMandlait is pretty complex, it’s probably done with a program called blender.
You think you know a lot, until you realize you have so much more to learn.
Lol, only you think you know a lot
There is a saying what we learnt is a size of 🥜peanut but 🌌Universe is infinite ♾️. Knowledge also infinite ♾️ cannot count like numbers 0000000000123456789000000000000..........no end
@@electron6241 I actually understood that - 100% true
@@Sai_Srikar_Panjala what we learnt from Google & UA-cam are 0.01% only.
@@Sai_Srikar_Panjala Google also don't has answer for some questions
I will not skip the Ad as a matter of gratitude for the immense value provided through this video. The channel needs to grow. Money in exchange for incredible animation and informative content..... Basic Economy !!
I really love this channel. I never even thought to wonder about this technological challenge, but the explanation is fascinating.
This channel explains concepts like no other!! Grateful to have such content for free.
sir , you are providing a depth knowledge in a very simple manner , thanks alot for that .
Great Videos, It's really a treat to see high-quality explanations of engineering topics!
OMG look spectrum of this frequency: 1:53 !
Great video!
oh mama
Savage 😂😂
🤣🤣🤣🤣
i lost my connection there
This comment shows us how similar engineers are to teenage boys. That said I came to the comments looking to see if anyone else noticed that..
"These sub-carriers are mathematically orthogonal to each other and each of them are modulated individually.
We hope this video gives you a clear understanding about what is spectrum."
yep, all clear 🙂
great video. My head is exploding. But I mean it, it's a great video. Thank you
great video!! i love the way this channel talks about the physic behind techniques
Thanks!
Nice to see a video that explains what my job helps with on a larger scale. Thanks!
thank you for everything you do. really appreciate the hard work you put into your content
Engineering milestones described per second is highest of this channel. Adbhut..
I worked on LTE software, this video is an accurate description
No, this video is not accurate anymore starting from 3g, even before before LTE. 3g wcdma and 4g LTE greatly improve frequency reuse, so the same frequency can be also assigned to users within different sector if the same cell (3g) or even within same cell sector (4g LTE and MIMO with beamforming)
شكرا لكم ،أتمنى لكم الخير والتوفيق ، وأتمنى أن يكون هناك المزيد من الفيديوهات عن علم الإتصالات في قناتكم العربية 🖤
Thanks
Thanyou teacher❤😊
Discovered your channel yesterday. Great explanation.
This video was better than the course on my university. :D
Wow! Amazing
Thank you for making me fall in love with technology even more
Me and my friend would joke around and call each other's mobiles despite standing next to each other.
We would always hear a high excruciating frequency wave , I was always sceptical on why. Now it makes a lot of sense watching this video.
Why does it happen though
Super useful information. Loved it. Thank you man for making this so clear to understand 🙂
I always watch learn engineering videos in my spare time and it's worth learning through it. Always providing knowledge, Keep It Up, Team!!!!
Wow what an explanation.love u sir.....
Bt How can People dislike it.
May be they are "out of the world".
🔥🔥🔥 These fires came while listening 🎧....
Great video, very well thought out and informative for the general public. Congratulations!
Explain in such a lucid manner!
I am doing my masters in Communication system the concepts here are so insightful
i have learned more after watching like 5 of of your videos than months of reading books. the graphics and analogies help tremendously
I've been looking for a video that explains this info, but just never knew how to ask it, and glad i found your video!!!!!!!!!! Sorted out a lot of qestions I had
Damn.... It's hard to comprehend , just imagine that someone made it before that we understood it.
What a channel. 100/100 loved it
Thanks to LE for making Telcom more easier to understand.
This is great😀! Thanks for the video
Thanks bro I really love these types of subjects than a boring poem and grammar's , I really love the way of learning by Looking in real life
Excellent Demostration !!
Notes
1. The information signal is delivered using EM from cellular data to tower. Every EM waves (analog signal) have it own frequency and amplitude.
2. How the signal reach the accurate receiver?
The frequency signal differs for every users. Mobile phone will only accept the signal where the signal assigned to it. Every signal has it own data frequency.
3. Other fq will be rejected by phone filter circuit.
4. Each devices has it unique frequencies. Or frequency ranges. So each device has it own fq range.
5. Antenna are capable to transmit signal into this frequency range or band.
6. Every device filtering circuit also allows a fq band.
7. Udung frequency modulation. High fq express as 1, low frequency express as 0.
8. Signal sent over the fq are protected by every device encryption. Which mean only your device can decrypt it. Hacker can’t access the information.
9. As the world is wide, EM is limited. Assigning a unique frequency range yo each user in the world is impossible.
Why fq bad is limited and how to overcome.
Notes about EM spectrum.
- EM energy increase while wavelength decreases.
- in order radio wave to Infrared, uv waves and gamma waves.
-higher fq of EM, the worse the penetration capability.
-
Nntilah sambung
Very informative Video.
Thanks a lot !!
1. The information signal is delivered using EM from cellular data to tower. Every EM waves (analog signal) have it own frequency and amplitude.
2. How the signal reach the accurate receiver?
The frequency signal differs for every users. Mobile phone will only accept the signal where the signal assigned to it. Every signal has it own data frequency.
3. Other fq will be rejected by phone filter circuit.
4. Each devices has it unique frequencies. Or frequency ranges. So each device has it own fq range.
5. Antenna are capable to transmit signal into this frequency range or band.
6. Every device filtering circuit also allows a fq band.
7. Udung frequency modulation. High fq express as 1, low frequency express as 0.
8. Signal sent over the fq are protected by every device encryption. Which mean only your device can decrypt it. Hacker can’t access the information.
9. As the world is wide, EM is limited. Assigning a unique frequency range yo each user in the world is impossible.
Why fq bad is limited and how to overcome.
Notes about EM spectrum.
- EM energy increase while wavelength decreases.
- in order radio wave to Infrared, uv waves and gamma waves.
-higher fq of EM, the worse the penetration capability.
Im learning so much tbh. thank u so much for these videos!!!
This video was very informative, clear and concise. Automatic sub and like!
Hats off to Learn Engineering for such a complicated subject made easy to learn. Really.
Really awesome! I highly appreciate Learn Engineering.
Great video! Hope to see more in depth videos about this topic. Thanks!
Transmitted data are mainly encrypted. So, no two users can receive same data. Different users are assigned different frequencies to avoid interference.
Nice presentation.
Please, explain details about the multiple access.
wow! super easy to understand!
Had always been curious since childhood on how one phone rings amongst many kept together.
I think I got the clue today. Thanks! 🙏🤗
Thank you for the knowledge sir.. The 3D animation is great.
Perfect illustration.
Best example given it really helps a lot
This topic is great for me .
Thank the creator !
this is something new to me. thank you for the knowledge.
Thank you so much @Lesics 💖💖✔
1:53 Keep up the good work
Such an informative video! Thank you!
so nicely and precisely explained. thank u for the stuff
Very very nice explaination.Thank you sir
3:31 Energy and hence penetrating power of EM waves are proportional to its frequency. But you say, high frequency implies worst penetration power. How is this possible? Gamma and X-rays are not preferred, because because, they interact with matter and get absorbed, but radio waves frequencies get reflected easily. Thus it can reach maximum range by continuous reflections in an area with lot of obstacles.
Thanks for clearing the doubt man
I was having the similar doubt
Thank you for such a great video and your dedicated hard work. God bless you.
Awesome wealth of Knowledge!
Very good and informative vodeo. Thankx savin bro.👍☺☺
7:32 welcome ☺️❤️
Thank you Bro for very imformative contain..
Woah this is sonuseful and well presented
But the ball fountain analogy has a quirk
Smol bols get into large holes
OFDM was the saviour for intersignal interferrence and multipath rayleigh profile delay spread, a truly remarkable technique to modulate signals,
Thnk U.
I only hear about
2G_Spectrum-'SCAM'
Wow glad I discovered this channel very informative thanks
شكرا جدا
هذه أفضل قناه هندسية علي الاطلاق
طريقة عرض بسيطه وشيقه
شكرا لكم من مصر
About halfway through the video it was stated that it was going to be explained what has replaced giving each user a unique frequency distribution. It never was.
1:27 small ball can be picked up by large cup no?
Great video. Thank you
Great video. This is exactly what I wanted to know. Thanks!
Perfect in action of electromagnetic power.
Also Dr. Stone is an amazing manga, must read for tech historians
I can't wait for the new season to be released!
Lol weebs
In 4:00 the portion is not used because propogation depends upon ionosphere, then what is restriction.
I cannot understand that reason.
it's very informative 😮👏🏻
"your government is able to garner a huge revenue..just by being a regulatory body"
Perfect way to end a great video
This is like some esoteric magic
Wonderful explaination
1:28 the blue ball can occupy the other cups, making the right ball unable to access it
I like the hacker has a mask.😂😂
Pitstu
1:56, daaaaaamn
Love your videos, however, for some strange reasons the sounds volume keeps dropping during sporadic moments but then quickly corrects itself. Something to look into perhaps 🤔. But as previously mentioned, I do love your content despite this niggling little issue, thats not to say you shouldn't correct this.
Does EM waves present everywhere as full range with all types of waves? If an object absorb some visible light what does it mean? Does it mean that visible spectrum only incident the object and some Wavelengths are absorbed and some reflected?Or EM wave with full range hit that object first , and object absorbs only visible light ?
Great work👍
Great , thanks for explaining in very easy , pls come up with more topics
5:11 But is it not a problems that this wave has discontinuities?
Thank you so much.❤
Great video 🙏🙏🙏🙏🙏
Thanks for sharing this information....
Excelent video! Thank you!
Nice vid but it says nothing about the spectrum of basic waves like a simple sine, square, triangle etc and how a periodic signal is composed of sinusoids (what's the spectrum of it?). Ortogonality, in this case says nothing to many people. Once you included it you really should have said something more about it. Should have been entitled something like 'Frequencies in telecommunication'. But still it's a cool vid though! Keep on making them! :D
Thnx for the effort
Frequency reuse technique plays a major role in cellular communication
Thanks but that didn't really give a complete break down
K. Tucker I have committed various war crimes
for a complete breakdown, people go to college and study signal engineering
Watching the video for the second. Jeep the work, indian man
Imagine you are talking to someone and you hear several voice 😂😂
You are great