Sample Rate Altering Blocks

The folder contains 2 codes: 1)to implement an upsampler 2)to implement a downsampler

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.