In BER SIMULATION of BPSK IN RAYLEIGH FADING ENVIRONMENT when I place h=sqrt(1/2)(randn+jrandn) before while loop I don't get any curve and total BER result why is that ?

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Mashrur Zawad 2022-3-30

编辑： Mashrur Zawad ，2022-3-30

clear

EbN0dB_vector=0:2:20

Eb=1;

for snr_i=1:length(EbN0dB_vector);

EbN0dB=EbN0dB_vector(snr_i);

EbN0=10.^(EbN0dB/10)

N0=Eb/EbN0;

sym_cnt=0

err_cnt=0

h=sqrt(1/2)*(randn+j*randn);

while err_cnt<500

s=sqrt(Eb)*sign(rand-0.5) ;

n=sqrt(N0/2)*(randn+j*randn);

r=h*s + n;

D=r*exp(-j*angle(h));

s_hat=sign(real(D));

if s_hat~=s

err_cnt=err_cnt+1;

end

sym_cnt=sym_cnt+1;

end

BER(snr_i)=err_cnt/sym_cnt

end

figure

semilogy(EbN0dB_vector, BER)%y in logarithm scale

xlabel('E_b/N_0 [dB]')

ylabel('BER')

grid

%Get result upto this

BER =

0.0543 0.0001 0.0057 0.0008 0.0007 0.0031 0.0049

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