Digital Filtering
• In signal processing, the function
of a filter is to remove unwanted
parts of the signal, such as
random noise, or to extract useful
parts of the signal, such as the
components lying within a certain
frequency range
, Two Classes of Digital Filters:
a) Finite Impulse Response (FIR), non recursive,
of the form
y (n) h(0) x(n) h(1) x(n 1) ... h( N ) x(n N )
With N being the order of the filter.
b) Infinite Impulse Response (IIR), recursive, of
the form
y(n) a1 y(n 1) ... aN y(n N ) b0 x(n) b1 x(n 1) ... bN x(n N )
• In signal processing, the function
of a filter is to remove unwanted
parts of the signal, such as
random noise, or to extract useful
parts of the signal, such as the
components lying within a certain
frequency range
, Two Classes of Digital Filters:
a) Finite Impulse Response (FIR), non recursive,
of the form
y (n) h(0) x(n) h(1) x(n 1) ... h( N ) x(n N )
With N being the order of the filter.
b) Infinite Impulse Response (IIR), recursive, of
the form
y(n) a1 y(n 1) ... aN y(n N ) b0 x(n) b1 x(n 1) ... bN x(n N )
