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From: Kingsley Ohia on 30 May 2010 20:49
hi,
i'm trying to model a binary psk31 (31= Baud rate) transmission system so I can analyse and see how it works. I started by modelling a BPSK system which works ok, and gives me same probability of error as the theoretical graphical representation of Error Rate vs Eb/No. The Model is in d following order (using simulink):

Bernoulli Bin gen - BPSK mod - AWGN - BPSK demod - Error rate Calc - Display.

Now the challenge is how to set the baud rate to 31symbols/sec, and how to implement a low pass filter and a bandpass filter (of 15Hz) to make it a PSK31 transmission system.
I tried using the transfer function block but got the error message "The "VariableStepDiscrete" solver cannot be used to simulate block diagram 'untitled4' because it contains continuous states."
I would really appreciate any contributions.
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