Band edge filter for raised cosine impulse

1. What is raised cosine filter used for?
2. What is a band edge filter?
3. Which of the statements are the limitations of the raised cosine filters?
4. Why raised cosine filter is used instead of ideal low pass filter in practical system?

What is raised cosine filter used for?

Raised cosine filters are used for pulse shaping, where the signal is upsampled. Therefore, we also need to specify the upsampling factor.

What is a band edge filter?

Band edge filtering is one such example of a frequency error detector. In the absence of timing and data, once a valid signal starts arriving, the timing offset can lie anywhere in the range (0,TM) ( 0 , T M ) .

Which of the statements are the limitations of the raised cosine filters?

Raised cosine filter does not satisfy Nyquist criteria.

Why raised cosine filter is used instead of ideal low pass filter in practical system?

A raised cosine filter response is wider than the ideal low-pass filter, due to the transition band. This excess frequency bandwidth is controlled by a parameter called the “roll off” factor. The frequency response is plotted for several different roll off factors.