Quaternary Amplitude Shift Keying

clear all

M=3

NPoints=input( Enter the number of points>> )

NumberBits=input( Enter the number of points per bit>> )





Signal Constellation of ASK



for i=1:NPoints

m=round(rand(1)*3)

data(i)=2*m-1-M

end

scatterplot(data)

grid on

for i=1:round(NPoints/NumberBits)

m=round(rand(1)*3)

for j=1:NumberBits

A(i,j)=2*m-1-M

end

end

figure(2)



plot(A) - Quaternary Amplitude Shift Keying

clear all

M=3

NPoints=input( Enter the number of points>> )

NumberBits=input( Enter the number of points per bit>> )





Signal Constellation of ASK



for i=1:NPoints

　　m=round(rand(1)*3)

　　data(i)=2*m-1-M

end

scatterplot(data)

grid on

for i=1:round(NPoints/NumberBits)

　　m=round(rand(1)*3)

　　for j=1:NumberBits

　　　　A(i,j)=2*m-1-M

　　end

end

figure(2)



plot(A)