In the previous traditional software defined networks and in this topic, we are going to learn about
the different communications center and signals.
So first we talk about VAGY, that is, you can also say this is the analog communication, so we have
to standard that is impious and empty.
The impious is known as the Advanced Mobile Phone Service that just started in us and later adopted
everywhere.
So the impious started based on the FCC spectrum allocation.
And the second one was and then there is no mobile phone.
So there was two types of them.
There is an empty facility and then eight, nine.
So basically for two days, the same sorts of on the privacy policy makers.
And you talk on the 900 megahertz.
So they are be analog system and also known as the 1G.
The second generation communications standards systems have evolved in this case.
There are forces that use I to find the GSM stand for global system for mobile communication standard
deployed by European Telecommunications Standards Institute.
And the second one is that I use ninety five.
So it is also called has them introduced under five, which first ever to list distance cellular technology
and equal to provider Qualcomm.
And it was in the 90s.
So from here that is still standard has evolved similarly in the case of 3G, which was evolved in 2000.
So it has the standards like the Blue Souleyman that is quite well code division, multiple access.
It is also called third generation and then it is B plus there is high speed access and then you that
is evolution data optimized for broadband access.
So obviously, as that generation moved, the network performance has increased.
Similarly, in the case of all, it was launched in 2010.
This consist of LTE, LP and was the LP stand for the long term.
Evolution is the standard for wireless broadband communication and it increases the capacity and the
speed.
Then compared to the previous generation, the standards and the 5G, which is launched in 2020 5G,
have the capability to change the landscape of communication.
If you also call this new review.
So it provided a very high speed rail system and IT machine to machine device to device communication
because it can be used for that used in front of me, like it can be used as variables in public safety
and emergency.
Moreover, it can be used to do monitoring mobile computing.
It can be used in communication as well as in smart cities for different monitoring and control applications.
Moreover, this is or and this can be used in the automation that to the industrial revolution of next.
We are going to discuss about the different communication signals which are generally used to be a single.
Don't suppose we have a time domain signal that this is the signal when I will take up frequency domain
of this quintupling analysis of this signal, I will get to this in my frequency and this is zero.
So I have, if I do what, ask for this signal.
So that is called single code because it has a single goal.
Similarly, if I if I have a two signals and I took a frequency to transform, then I have this in my
frequency.
This is this is a certain frequency if one this is F2.
So it is called Bluetooth signal because you tend to code and then we have the multi carrier signal.
What is the you signal in the multi then you signal we different.
That's different, all that is called this multi multifarious signal you so you can also see the signal
carrier, so you can also take a single carrier, take a look at you and you can say the multi-party
system.
Then we have a decent system to like spectrum of GSM that relies on spectrum.
And if we see something like this, so it kind of narrowband signal and this is the spectrum.
Next, we have a WCG signal.
So when you plot or visualize the spectrum of what you do, miss signal, then it will be seen something
like this.
So this is the spectrum of the signal and this will be the bandwidth.
Can you present using this week with the bandwidth of the signal and in the case of LTE, the spectrum
will be seen like this?
So this is the spectrum of the signal, and when you look at your resignation, in the case of any allegation,
you can combine different energy signals like this one.
So this is the one and you can combine this and do so, this combination and the use of impended as
well as the different.
So what can you do?
So using categorization, we can increase the efficiency of the overall efficiency of the system because
you can combine the multiple pedia to increase the transmission bandwidth in case of 4G of two hundred
megahertz, then you have efficient we can provide.
So these are some set of common signals which we will see in the case of as the communication then displays
all those things.
You receive something like this on the spectrum analyzer.
So this picture is just to present an overview, how the he's in L.A. has been involved.
So there are different police standards in the long term evolution standard.
So so for this one, they can only see that this 16, 17 and 18, 16 is current.
So first one because it is 16.
So the release 16 is these two had been distracted from us and it is expected to complete by March 31.
And then 16 days will start, then it will further evolve and completed by December 2021.
Moreover, simultaneously, the TPP is started the defining release 17 content definition.
Then it is 17 stage one had started.
Then according to this timeline, this development would be start in those areas.
And finally, we must do more of it.
In the December 20 21, the release of teen content, information to be decided and which will be further
involved.
So these are the these are the evolution of LTE.
And so there is this trend here and there, and after that, the different releases of this standard.
So just.
A quantity picture providing out has been.
So in this topic, we have learned about the different communication standards like ageism, us and
I use ninety five, the medium and the 5G and the different signal, and we have also learned how the
different schools look to us.
Next, we are going to learn that you went for consumate analysis of these signals and how we can visualize
the signal correctly as well as mathematical.