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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...

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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.

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