I am working on a project where I am supposed to design a computer program to simulate a simple synchronous DS-CDMA system with BPSK modulation for single and multiple user. In the channel, there are both rayleigh noise and gaussian noise. When I tried in simulink without pulse shaping filter, the BER came 0 which is normal. Since, I am supposed to use pulse shaping filter, I had to add the blocks.
For transmitting, I added raised root cosine trans. filter and for receiver I used raised root cosine receiver filter block of simulink library. After adding these, I get BER around 0.5 so I think, I am making some mistake either in the algorithm or in the parameters values. I am adding the image of the block diagram. Can you please help me out??
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