Root raised cosine parameter I try to create matched filter for receive BPSK signal. Sampling rate of the signal is 228000 Hz, data rate 1187.5 symbols/sec, signal was shaped using root raised cosine filter with rolloff factor = 1.

I cant get what should be sps — Samples per symbol in function rcosdesign . First i thought it's 228000/1187.5 , but tried it and probably I'm wrong...
No, you're right. It wants to know how many samples you have for each symbol in the BPSK stream. This is the ratio of the sample rate to the symbol rate.