matlab误码率的代码,matlab实现BPSK误码率仿真

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BPSK BER simulation

I need to solve the problem with BER calculation. I made a coherent correlation

type detector in MATLAB for a BPSK signal, but when I demodulate the noised

signal BER is much worse than it sould be in theory for coherent detection. I

add noise using awgn() function setting the desired SNR[dB]. I assume

Eb/No[dB]=SNR[dB]+10log(Tbit/Tsample) So why is it? My M-files are attached. I

used 1000 bits to simulate and SNR=-12dB which equals according to the equation

Eb/No=8dB. Theoretically the result shoul have been around 1e-4 and I get

BER=4e-2. The BER curves of the desired and of the reality I have are also enclosed.

Please help!

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