‫Now we can choose the constant modulus equaliser in the January duel, using the constant more bootless
‫algorithm equalizer block.
‫And we set the parameters of this block.
‫What are the number of apps that we want to use, the modulus that has a value of one?
‫What is the gain of this equalizer and what is the upsampling factor of the signal that is being input
‫to this equalizer?
‫Now, this is the floor diagram in which I have included the effect of the equalizer.
‫And here I have added the equalizer block.
‫Now, when this signal is generated, it is passed through the PSU more pollution block where the number
‫of constellation points is four.
‫That means I am using Deek be asking more volition.
‫And the simple Spurs symbol is four.
‫That means that the signal is being ups hampered by a factor of four.
‫And after that, these BSEE modulated symbols are then given to the general model block.
‫And in the channel model block, I am basically defining this channel with six Myrtie parts and I am
‫defining this channel as a variable apps and Intertek apps.
‫I can see that there are one.
‫Bu.
‫Three.
‫Four, five, six steps.
‫That means that there are six multi parts between the transmitter and the receiver.
‫And they are being defined as the variable daps and this variable.
‫Perhaps I am giving it as an input to the channel model blog here as apps.
‫Now, I have said the Epsilon as one.
‫That means that there is no timing difference between the clocks and the transmitter and receiver.
‫I have said the frequency offset is zero.
‫That means that there is no frequency difference between the carriers and the transmitter and receiver.
‫And I am adjusting the noise voltage using the slider that is here.
‫Using this slider, no.
‫The reason that I'm assuming no frequency offset and no timing difference is that I only want to see
‫the effect of inter symbol interference on the signal due to the multi parts and how that effect of
‫the inter symbol interference is removed and the receiver is using the equalizer.
‫And this is the equalizer block.
‫And in the equalizer block, there are 15 steps.
‫And the I have set the modulus has one, obviously.
‫And here I am defining the gain of the equalizer.
‫That how quickly this equalizer is going to adjust itself.
‫Videos in changing the entire symbol interference.
‫And then the upsampling factor.
‫This is the upsampling factor of the signal that is being received by the equalizer.
‫And since the transmitter we are setting the upsampling factories for.
‫So here the signal that is being retrieved by this block that also has the Upsampling Pictet of four.
‫So I have bought four here and now I am seeing the constellation of this signal at two points.
‫The first one is the constellation sync that is attached to the channel model to see the effect of inter
‫symbol interference due to the multi part in the channel.
‫And then I am attaching the Constellation sync to the output of the equalizer in order to see that how
‫efficiently equalizer is removing the effect of inter symbol interference.
‫Now, when I run this.
‫Floor diagram.
‫So here this is the output of the channel.
‫And in this Constellation diagram, I can see that there is too much inter symbol interference due to
‫the multi pots, indeed, the chairman.
‫And this is the output of the equalizer.
‫And here I can see that the equalizer is very efficiently moving the effect of the inter symbol interference.
‫Now, if I change the noise voltage.
‫I can see that there is effect on the symbols.
‫There is more noise in these symbols.
‫And if I change the.
‫Equaliser read that, how quickly the equalizer adjusts itself.
‫And if I increase it beyond a certain limit, then I can see that the performance of the equalizer has
‫degraded.
‫And it is not it will glucan, right?
‫So I bring it back.
‫And I just stayed at a point where the equalizer is efficiently removing the effect of the imperceptible
‫interference.