1)Upsampler Block:
Description:
The characterisation of the upsampler block can be done by the formula:
y(n)=x(n/L){n=...-L,0,+L...};
= 0 otherwise.
Syntax:
[y ny]=upsampler(x,n,L)
x is a sequence over indices specified by n.L is the upsampling rate. It pads L-1 zeros between any 2 consecutive samples in x.
y is the output sequence over indices specified by ny.
2)Downsampler Block:
Description:
The characterisation of the downsampler block can be done by the formula:
y(n)=x(nM)
Syntax:
[y ny]=downsampler(x,n,M)
x is an input sequence over indices specified by n.L is the downsampling rate.It ignores (M-1) samples between kth sample and (k+M)th sample.
y is the output sequence over indices specified by ny. |