Which is the square root raised cosine filter?
Both transmitter and receiver employ square-root raised cosine filters. The combination of transmitter and receiver filters is a raised cosine filter, which results in minimum ISI. We specify a square-root raised cosine filter by setting the shape as ‘Square root’.
When to use a raised cosine filter in pulse shaping?
Raised cosine filters are used for pulse shaping, where the signal is upsampled. Therefore, we also need to specify the upsampling factor. The following is a list of parameters used to design the raised cosine filter for this example.
How is the square root filter different from the normal filter?
The normal filter has zero crossings at integer multiples of sps. It thus satisfies Nyquist’s criterion for zero intersymbol interference. The square-root filter, however, does not: Convolve the square-root filter with itself. Truncate the impulse response outward from the maximum so it has the same length as h1.
What is rolloff factor for raised cosine filter?
For information on how to use square-root, raised cosine filters to interpolate and decimate signals, see Interpolate and Decimate Using RRC Filter (Communications Toolbox). Rolloff factor, specified as a real nonnegative scalar not greater than 1. The rolloff factor determines the excess bandwidth of the filter.
Such a filter also has a group delay of three symbol durations. Raised cosine filters are used for pulse shaping, where the signal is upsampled. Therefore, we also need to specify the upsampling factor. The following is a list of parameters used to design the raised cosine filter for this example.
How is peak response delayed by raised cosine filter?
It is difficult to compare the two signals because the peak response of the filter is delayed by the group delay of the filter (Nsym/ (2*R)). Note that, we append Nsym/2 zeros at the end of input x to flush all the useful samples out of the filter. This step compensates for the raised cosine filter group delay by delaying the input signal.