Understanding Spectrum! | ICT #6

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.

[ronitnayak]

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

[Tarodenaro]

Whoever did the 3D is the reason why i enjoy all of these videos.

[chrisframpton]

You think you know a lot, until you realize you have so much more to learn.

[Spacetime]

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 Basic Economy !!

[Pikminiman]

I really love this channel. I never even thought to wonder about this technological challenge, but the explanation is fascinating.

[divyarao]

This channel explains concepts like no other!! Grateful to have such content for free.

[CBT]

OMG look spectrum of this frequency: 1:53 !




Great video!

[ashutoshpandey]

sir, you are providing a depth knowledge in a very simple manner, thanks alot for that .

[omarjarkas]

Great Videos, It's really a treat to see high-quality explanations of engineering topics!

[PeterPerhac]

"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

[sriharsha]

I worked on LTE software, this video is an accurate description

[ToanNguyen-wmzz]

great video!! i love the way this channel talks about the physic behind techniques

[Hambxne]

thank you for everything you do. really appreciate the hard work you put into your content

[J_]

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.

[beylil]

Discovered your channel yesterday. Great explanation.
This video was better than the course on my university. :D

[hexprince]

Super useful information. Loved it. Thank you man for making this so clear to understand 🙂

[SAISAD]

Wow what an explanation.love u
Bt How can People dislike it.
May be they are "out of the world".

[claramelb]

Wow! Amazing
Thank you for making me fall in love with technology even more

[Veer-sset]

I am doing my masters in Communication system the concepts here are so insightful

[cloverushwana]

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