How will wireless 5G technology handle 1 000 times more data?

Popular Science talk about 5G, the basics of digital communications, and its applications. The speaker is Professor Emil Björnson, KTH Royal Institute of Technology, Sweden (He was an Associate Professor at Linköping University while recording this video). Download slides: github.com/emilbjornson/prese... (Thanks to Prof. Mikael Olofsson who created the animation.)

[@dyode1]

Concise, clear analysis and explanation with the major 3 variables highlighted in the bandwidth equation - thanks for the video, I'd seen 4 or 5 other youtube videos but yours is by far the most valuable.

[@TheHitchOo]

Thank you for the presentation and also for the slides

[@namitaigit]

Superb! Thanks so much :)

[@brsinha]

This is how you teach a complex topic in most simplified and easy to understand manner.. Thank you so much professor .

[@amancalledfroggy]

Thanks for this, very clear and concise.

[@saisrikargollamudi7892]

Beautiful video. Thank you, Sir.

[@mohand_ouamernait_belaid9870]

Thank you for the presentation, it was so clear

[@diggleboy]

Fantastic lecture and series on MIMO technology, applications and constraints to consider. Enjoying your series of lectures. Thank you for putting them all together and sharing it with the TH-cam community and public as a whole.

[@glenngibson4674]

Do not understand how the digital wave form is transmitted. Is the carrier frequency AM or FM or other? How is the noise eliminated?

[@hoshyarm]

Excellent presentation professor as always.

[@nightking4615]

This dude is really good at explaining stuff like this.

[@Maria-mt2rz]

Great presentation style!

[@drsasikalas170]

very clear presentation,clear explanations and good demo ..thanks for this class..

[@kikjakify]

Amazing. Lucid, concise and interesting!!

[@JC-rz6db]

Beautiful presentation.

[@SatyamSingh-ll7ib]

Thanks for the Crystal Clear Explanation.

[@RGPinger]

I like his voice. He presented it great.

[@suseelapaPattamatta]

Brilliant leacture. Thank you.

[@izharulhaq7680]

Very informative , Thanks Sir for such great presentation.

[@fahimehjabbarinia401]

Fantastic Dr. very clear and understandable.

[@yasam7086]

Thank you so much for this video 🙏

[@sudhakars1573]

This tutorial very useful

[@candogan8049]

flawless info thank you

[@mharinathreddy8262]

Thank you very much :)

[@RohitVerma-qu6eu]

Well explained sir.

[@peramesh1325]

Thank you for the presentation and it is very clear and concise about improving the data rate

[@ir.sureshkumarkandasamy2960]

Thank you

[@rageshka]

Any technology simple if we get teacher like you :)

[@gustavofodino3793]

Thank you Emil, very clear and nice. Thank you also for share your slides. Regards Gustavo Fodino - Argentina - Universidad Tecnológica Nacional

[@chuahtc]

To achieve high spectral efficiency, I think you should also mention the use of higher-order modulation schemes, which is one of the enhancements made from LTE to LTE-Advanced/LTE Advanced Pro/5G.

[@WirelessFuture]

Yes, when a communication channel supports a higher spectral efficiency per user, then that can be implemented using a higher-order modulation scheme.

[@kozhenidres314]

the question that pop-up im mind is (frequency-bandwidth-datarate) relation
1. is 20MHZ in 2.4GHZ band is as effective as 20MHZ in 5GHZ band or in mm wave band ??
the purpose of going through higher frequency is only to have more bandwidth that could be used ??
2. assume that we are working on 40MHZ channel in 2300MHZ band for LTE network these 40MHZ is limit us to send 40 million pulses from transmiter to the receiver ??? if is the case what is the limit of increasing pulses per second
to be more clear .... we know in optical networking almost 10G buad (10 billion pulses per second) is the limit till now so what is the limit of wireless transmission pulses or symbol rate ?
3. higher order modulation increases data rate in wifi 6 1024 QAM is achieved (10 bit/ symbol) using amplitude and phase modulation but why they could not use Frequency modulation to create more complex and effective modulation ??

[@kozhenidres314]

thanks for everybody who answers these questions

[@WirelessFuture]

1. Yes, 20 MHz is equally effective in any band if the SNR is the same. However, the propagation conditions are better at lower frequencies (signals propagate through walls better) so it is easier to get a good SNR in those bands. You are right that going higher in frequency is just about having more bandwidth.

[@WirelessFuture]

2. The symbol rate is proportional to the bandwidth, so it all depends on spectrum band. The radio spectrum is almost 300 GHz wide, while the optical spectrum is much wider. However, you also need hardware that can create signals that vary at the symbol rate and receivers that can take samples. This will be one of the practical limiting factors, along with the SNR which becomes worse at higher frequencies.

[@WirelessFuture]

3. When we say that you get a certain number of symbols per second, there are different ways to implement it. One is to transmit short pulses as described in the video. Another option is frequency modulation. The most common choice today is OFDM (orthogonal frequency-division multiplexing).

[@kozhenidres314]

@@WirelessFuture thank you alot i have read more than 50 articles in last 3 months but none of them useful and clear like your answer , i appreciate it prof

[@marcelodeavilaafonseca1400]

thanks!

[@greencoder1594]

[11:10] Start / [17:02] Summary
*1. Increase Cell Density*
-> Reduces overall power requirement to cover the same area
-> Drawback: Interference
*2. Increase Spectral Efficiency*
- 2.1) Channel capacity poses a theoretical limit on the practical transmission
-> Increase signal strength
-> Drawback: 17-fold increased power requirement to achieve 2-fold increase in Bit/s/Hz
- 2.2) Multiplexing of many communication channels via one antenna-array (MIMO) which sends a spatially directed signal
3. Incrase Spectral Usage
- Utilize higher frequency bands (30-300GHz / millimeter waves)

[@antoniss1997]

Dude u are incredible

[@McAmber]

Looks awesome

[@abinetendale2455]

nice video

[@saifulislam-gf3fo]

My question about MIMO, in 4G we use parallel transmission using multiple antenna where we each antenna element work individually and their gain is same. this system increases channel capacity because it provides a parallel channel. where In 5G we use multiple antennas for high multiplexing gain and beam steering; however, not parallel transmission in the case of analog beamforming, in this way, we get high channel capacity because of high gain, not the parallel transmission, and if we use digital beamforming where we can use parallel transmission as well as high multiplexing gain which can improve channel capacity much higher rate than the analog beamforming technique. Am I understood correctly?

[@WirelessFuture]

Parallel transmission are achieved by transmitting the same signal from multiple antenna elements with different phase shifts (and potentially amplitude) to achieve coherent interference at the desired receiver location. This is done in both 4G and 5G, it just that 5G is designed to be better at limiting the interference between the parallel transmissions. You are right that analog beamforming cannot be used for parallel transmission but just to focus a single signal at the desired receiver. This is illustrated in this video: th-cam.com/video/xGkyZw98Tug/w-d-xo.html

[@mopol4400]

Hello prof
First, thanks for all this information
SIMO bound is one of the Up link detection technique in massive MIMO system
is that mean there is an only one user in the system or what?
THX

[@WirelessFuture]

I'm not sure what statement in this video you are referring to. The uplink of Massive MIMO consists of many parallel SIMO channels, one per active user. Linear detectors are utilized to manage the interference. You can find a detailed description in the following video: th-cam.com/video/Ob92pRLj0c4/w-d-xo.html

[@mopol4400]

Hello prof
First, thanks for all this information
Please, what does air interface latency mean?THX

[@WirelessFuture]

When a data packet should be sent from point A to point B, there is a transmission delay. A part of that delay is created when the wireless signals are propagation over the air. This is called the air interface latency and can include both the actual data transmission and other signals that are required to establish the wireless communication link.

[@DinarAndFriends]

So it's actually only 18x faster because of the new frequencies.

[@HimanshuSharma-yp6oi]

Dear Wireless Future, I am your subscriber and watch many video. I have some questions.
Q.1 What is the maximum number of users that can be connected to a 4G or 5G Base Station & Core?
Q.2 How many base stations can be connected to a core?
Q.3 Is the capacity of the Core and Base station different?
Q.4 What are the factors on which the no. of user connection depends & how? Are there any calculations?
Q.5 Can we have a real-life example of this from Nokia or Ericson?

[@WirelessFuture]

Unfortunately, I don’t know the answers to your questions. I believe these are highly implementation specific. If there are standard-determined limitations, then they are most likely dimensioned so that there won’t be any problems in practice.
Perhaps you can find some some answers by looking in books describing the 4G and 5G standards.

[@anandhakrishnanrk9202]

sir , what about NOMA Technique ? How it will improve the spectrum efficiency?

[@WirelessFuture]

It won’t. 😀 Massive MIMO is the non-orthogonal scheme that is being used in 5G, while the schemes that are referred to as NOMA didn’t (so far at least), since the spectral efficiency gains are too small and limited to very special setups.

[@thugl8653]

Hi. thanks a lot for your very useful explanation. I am Ph.D. student may ask regarding 5G signal propagation during dust and sandstorms

[@WirelessFuture]

Adris Boss it depends on which frequency that is used for the radio waves. If the wavelength is at the same order as the size of the grains of sand, the signals will be damped and the coverage of a base station will reduce.

[@thugl8653]

thank you for your interest prof, Emil... I found that your investigations and explanation are very clear. may contact you prof Emil.

[@thelastaustralian7583]

You 'have', and are 'ALL' being transhumanized into a 'real' Matrix. 'Modern corporatized Pavlovian Helots'. Try and escape from EMF for only one Week .....

[@adrianstealth340]

Hi is this safer than 4g ? On the body ??

[@WirelessFuture]

Adrian Stealth, don’t worry, it is already safe. But by improving the spectral and energy efficiency, 5G can transfer information using less energy.

[@telsat]

I wish more people could watch these kinds of videos about cell technology and stop listening to the fear mungers about the 5G technology. Great job

[@ranaiftikhar7139]

superrrrrr............

[@anoopmishra1442]

very information video sir Thank you so much !!!

[@namitaigit]

Where can i get these slides Prof Emil?

[@WirelessFuture]

You can find them here: www.commsys.isy.liu.se/~ebjornson/bjornson_popularscience_2017.pdf

[@namitaigit]

Thanks a lot, Prof.

[@gedefawtemie4381]

intrsting

[@pranjalpathak8486]

Well i use 2gb 4g data per day

[@emir4126]

Pranjal Pathak I use 5 gb per day

[@padkirsch]

@@emir4126 doing what? Streaming 4k video?

[@emir4126]

padkirsch no watching TH-cam whole day which is yes...

[@raulpi9441]

I use 2 - 3 Gb data / day in Indonesia.

[@Falindio]

Using your cellular data??