Explaining BPSK Demodulation ?

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Jason Hathaway
Jason Hathaway 2017-2-6
Hi everyone,
I've a simple question (or it should be one).
I have a sequence, let's say it is u = [1 1 0]. I've modulate it using BPSK as u_BPSK = [-1 -1 1]. I've sent it through AWGN channel using the command I found on the internet.
y = u_BPSK + sqrt(N0/2)*(randn(size(u_BPSK))+i*randn(size(u_BPSK)));
where N0 is the noise power spectral density:
N0 = 1/(10^(SNRdB/10));
I just want to understand how this type of demodulation.
Thanks in advance.

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