function?[p]=AF（snr_in_dB）
%?[p]=smldPe55（snr_in_dB）
%		SMLDPE55??simulates?the?probability?of?error?for?the?particular
%???		value?of?snr_in_dB?signal-to-noise?ratio?in?dB.
E=1;
H0=1;
H1=10;
H2=1;
SNR=10^（snr_in_dB/10）;	???	%?signal-to-noise?ratio
sgma=E/sqrt（2*SNR）;		???	%?sigma?standard?deviation?of?noise
N=10000;

numoferr=0;

for?i=1:N
????%?Generation?of?the?binary?data?source?follows
????temp=rand;???	??????		%?a?uniform?random?variable?over?（01）
???if?（temp<0.5）
??????dsource（i）=0;???	??????		%?With?probability?1/2?source?output?is?0.
???else
??????dsource（i）=1;	??????		%?With?probability?1/2?source?output?is?1.
???end
???%?The?detection?and?probability?of?error?calculation?follows.
H0=normrnd（0sqrt（0.5））+j*normrnd（0sqrt（0.5））;
H1=normrnd（0sqrt（0.