‫Now we come to the question, their tall pulse shipping is achieved at the transmitter and the receiver
‫now here in the first example.
‫We are not losing any pulse shipping.
‫So that means one is represented by a positive square symbol and zero is it presented by a negative
‫square symbol.
‫And then we multiply these square symbols by the carrier and we get the BP ASCII modulated signal in
‫this waveform.
‫And in order to demodulator this BP eskies signal again, we multiply it with the carrier passing through
‫the low pass filter and then we recover the baseband symbols that were transmitted.
‫And then we sample these symbols.
‫In the mid.
‫And after that, we perform the thresholding to decide whether it was one.
‫It was the eagle that was transmitted.
‫No, when we are using the pulse shipping, then at the output of this filter, we need to have these
‫raised cosine pulses.
‫So if this is the first Corea's cosine pulse that represents one, we need to sample it here.
‫The secondary is cosine pulse.
‫We would sample it here and the territory is cosine pulse.
‫We would sample it here and saw.
‫And in order to implement the pulse shipping, we would need two filters, one at the transmitter.
‫And the second one is obviously the disc Lobos Filter.
‫And these two filters should be matched filter.
‫That means that these two filters should have the same response.
‫So how do we achieve it?
‫We achieve that if we have a race cosine pulse.
‫And we take it square root.
‫Then we get the root.
‫Race was nine months.
‫So the response of the first filter should be rude trees or sign.
‫That means that the square symbols that are coming here, they should have.
‫Then after passing through this filter, they should have the shape of the rootlets, cosine pulses.
‫And this filter, it is as it is, the matched filter.
‫So it has also these rules.
‫Chris will sign.
‫And when the signal passes to Booleroo rotaries, cosine filters, the resulting signal has the response
‫of the previous cosine.
‫And we get here.
‫And then we sample these.
‫It is cosine pulses with threshold them.
‫And then we decide whether one was transmitted and ah, it was zero r it was zero that was transmitted.
‫And as a function of the channel conditions, we adjust these excess bandwidth off these rule rates
‫was sine filters by adjusting on small.
‫OK, for example or so of our small smaller is equal to zero point five.
‫We will be using 50 percent excess bandwidth for small R is equal to one.
‫We will be using hundred percent excess bandwidth.