I am here to check whether my line of thinking is correct.
- Root-raised cosine (RRC) filtering is one way to minimize intersymbol interference (ISI). Hence, we apply matched RRC filters on both sides of the communication link.
- We can adjust the roll-off factor $\beta \in \left(0,1\right]$ to trade-off the bandwidth (BW) for a better signal quality at the receiver. The borderline cases of $\beta$ are $\beta=0.01$ and $\beta=1$, where we "sacrifice" 0.01 BW and 0.5 BW, respectively.
- Now, this is usually when the impulse response function of a channel is assumed to have a normal distribution (or similar-ish). In other words, the noise is linear (i.e., AWGN)
- If this is no longer the case and the impulse response of the channel does not follow normal distribution, would RRC still be a viable solution? - I guess not but please correct me if I am wrong.