____ is used to reduce inter-symbol interference.(a) Root raised cosine filter(b) Sinc filter(c) Root raised sinc filter(d) Cosine filterI had been asked this question in a national level competition.This intriguing question comes from Techniques in section Cognitive Techniques of Cognitive Radio

____ is used to reduce inter-symbol interference.(a) Root raised cosin

1.	____ is used to reduce inter-symbol interference.(a) Root raised cosine filter(b) Sinc filter(c) Root raised sinc filter(d) Cosine filterI had been asked this question in a national level competition.This intriguing question comes from Techniques in section Cognitive Techniques of Cognitive Radio
Answer» Right answer is (a) Root raised cosine filter To elaborate: The raised cosine filter is an IMPLEMENTATION of NYQUIST low pass filter. It is USED for pulse shaping and to minimise inter-symbol interference. It derives its name from the frequency spectrum which resembles a cosine FUNCTION.

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