Hi , i'm new to matlab and i have trouble with simulation a signal with Bpsk modulation in lognormal channel. Can you explain for me please ! Thank you for reading

EbNo = (0:2:20)';   
P = 10.^(EbNo/10);  
R = 2;    
GT = 2.^(R) - 1;  

xi = 10/log(10);
mu = 10^(3/10);  
sigma = 10^(8/10); 


N = 10^6;

G = P.*lognrnd(mu./xi,sigma./xi,1,N);


OP_s = sum(G < GT,2)/N;


OP_t = qfunc((mu -10*log10(GT./P))./sigma);


semilogy(EbNo,OP_s,'o',EbNo,OP_t,'-')
xlabel('E_b/N_0 [dB]');
ylabel('Probability to stop');
legend('S','T');
set(gcf,'color','white');

[Walter Roberson]

Please be more specific with your question. For example, we do not know if you are familiar with binary representation, or with the mathematics of logarithms.

[Manoranjan kumar Singh]

any reference paper of ber theoratical equation