‫Now we come to the digital modulation scheme of the amplitude shift keying and the first example that
‫we are going to consider it is of the binary amplitude shift.
‫King Spoors, these are the Butte's zero one one zero one zero that we want to send using these binary
‫amplitude shifting.
‫So first of all, we need to convert these bits in to symbols and we will assign we look and we will
‫assign a vaulted level to zero.
‫For example, we assigns you to work at level zero.
‫And so this becomes or symbol of zero.
‫And then we assign some work to deliver to one to make December Hlophe one.
‫So we get this V form of symbols and then we multiply these this reform by cause of megacity.
‫And as a result, we get this binary yassky modulated signal in which four zero.
‫We are not sending anything.
‫And for one, we are sending these ghadiya.
‫No, this is also called as the all of skiing, because in this case, for zero, we are not sending
‫anything.
‫And for one, we are sending these Gadhia.
‫Now, there's another important concept that is very important in the context of the SDR, because the
‫name of the Constellation diagram comes again in the game in the context of the SDR and the Constellation
‫diagrams are used to represent different modulation schemes and the bindery ESM or relation scheme can
‫be represented using this constellation diagram.
‫And in this constellation diagram along the x axis, we have the cause of megacity and Long Devi X is
‫we have the minus sign of a megacity.
‫Since here the symbols are being multiplied by the cause of megacity.
‫So these symbols lie on the cause of megacity X are.
‫In other words, we can also see that these symbols rely on the eye axis are the infuse axis.
‫So here we see that we have assigned zero worded level to the symbols for the zero.
‫And we are not sending anything for these zero.
‫And so zero has zero energy.
‫So we can represent these zero symbol by a constellation point here.
‫And for one, since we have assigned some voltage to the symbol of one, we are sending the carrier
‫for one.
‫And it has some energy.
‫So this symbol of one will be represented by a constellation point here.
‫And the distance of this constellation point from the origin would be equal to the under rule of the
‫energy of this symbol in its modulated form.
‫So.
‫And since we are not using the sign of a megacity for demobilization in this more village.
‫So we are not.
‫We do not have any symbol along this sign of a megacity.
‫In other words, we can see it, see if we can see that there is no quadrature component.
‫Indeed, bindery yassky.
‫And since here we have boose symbols.
‫That means we send one bit.
‫But symbol of one symbol is it used to represent zero.
‫And the other symbol is used to represent one.
‫So we are sending one bit part symbol.
‫And this is the case of binary amplitude shift keying.