Ber of bpsk in awgn channel matlab code

1. How is the BER of BPSK related to the SNR in an AWGN system?
2. What do you mean by BER performance of AWGN channel?

How is the BER of BPSK related to the SNR in an AWGN system?

For realizing that, the effect of noise is represented in the baseband with Gaussian random samples added to each signal sample. The signal to noise ratio (SNR) is varied to show the effect of SNR on BER. Finally the theoretical BER, i.e. Q(sqrt(2*SNR)) is also plotted to show the correctness of simulation.

What do you mean by BER performance of AWGN channel?

In all digital modulation schemes, the bit error rate (BER) is an important metric. The BER is a direct measure of the possible data throughput under the given circumstances. That is, the smaller the BER, the better.