Impulse response of a root raised cosine filter
The root raised cosine filter is so called because
the transfer function is exactly the square root of the transfer function of the raised
cosine filter. Hence:
where a is the filter roll-off factor
and T is the symbol period of the message. An a = 0 corresponds
to an ideal brick-wall filter.
The impulse response for a root raised cosine filter is given by:
