function??sout?=?demodu_8qam_cir（?sinabtype?）

%%%%%%%%%%%%%%%%%%%%%%%%?baisc?parameters?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
N?=?length（sin）;
sout?=?zeros（1N）;
Psum?=?（2*b*b+a*a）/2;
Prms?=?sqrt（Psum）;
%%%%%%%%%%%%%%%%%%%%%%%%%%?demodilate?1?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
?if?type==1;
am?=?zeros（1N）;
thita?=?zeros（1N）;
c?=0.5*（a?+?b*sqrt（2））/Prms;
lable?=?b*sqrt（2）>a;
for?i=1:N;
am（i）?=?abs（sin（i））;
thita（i）?=?angle（sin（i））;
flag?=?am（i）?>?c;
if?（~xor（flaglable））
????if（thita（i）>0?&&?thita（i）????????sout（i）?=?1;
????elseif（thita（i）>pi/2?&&?thita（i）????????sout（i）?=?2;
????elseif（thita（i）>-pi?&&?thita（i）<-pi/2）
????????sout（i）?=?7;?
??????else
????????sout（i）?=?4;
?????end;????????????
else
???if（thita（i）>-pi/4?&&?thita（i）???????????sout（i）?=?0;
?????elseif（thita（i）>pi/4?&&?thita（i）<3*pi/4）
???????????sout（i）?=?3;
??????elseif（thita（i）>-3*pi/4?&&?thita（i）<-pi/4）
???????????sout（i）?=?5;
?????else
???????????sout（i）?=?6;
????end;???
end;

%%%%%%%%%%%%%%%%%%%%%%%%%%?格雷解碼?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
?if?sout（i）==2;sout（i）=3;
????elseif?sout（i）==3;sout（i）=2;
????elseif?sout（i）==4;sout（i）=7;
????elseif?sout（i）==5;sout（i）=6;
????elseif?sout（i）==6;sout（i）=4;
????elseif?sout（i）==7;sout（i）=5;
??else
?????sout（i）=sout（i）;
??end;
end;

%%%%%%%%%%%%%%%%%%%%%%%%%%?demodilate?2?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
elseif?type?==?2;
????xp?=?[ab-b0b0-a-b]/Prms;
????yp?=?[0bba-b-a0-b]/Prms;?
????dis?=zeros（18）;
????for?i=1:N;
????????for?j=1:8
????????dis（j）?=?sqrt（（real（sin（i））-xp（j））.^2?+?（imag（sin（i））-yp（j））.^2）;
????????end;
????????[xxnum]?=?min（dis）;
????????sout（i）?=?num-1;
%%%%%%%%%%%%%%%%%%%%%%%%%%?格雷解碼?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
?if?sout（i）==2;sout（i）=3;
????elseif?sout（i）==3;sout（i）=2;
????elseif?sout（i）==4;sout（i）=7;
????elseif?sout（i）==5;sout（i）=6;
????elseif?sout（i）==6;sout（i）=4;
????elseif?sout（i）==7;sout（i）=5;
?else
?????sout（i）=sout（i）;
?end;
????end;
????
%%%%%%%%%%%%%%%%%%%%%%%%%%?demodilate?3?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%????
elseif?type?==?3;????????
end;

%%%%%%%%%%%%%%%%%%%?change?the?octal?sequnece?into?binary?sequnece?%%%%%%%%%%%%%%%%%%%?
sout?=?de2bi（sout3‘left-msb‘）;
sout?=?reshape（sout‘13*N）;???????%change?the?octal?sequnece?into?binary?sequnece
sout?=?sout‘;???
%%%%%%%%%%%%%%%%%%%%%%???End????%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????2421??2013-05-05?21:25??demodu_8qam_cir.m
?????文件????????3207??2013-05-05?21:25??demodu_8qam_mat.m
?????文件?????????993??2013-05-05?21:25??mapping_cir.m
?????文件?????????974??2013-05-05?21:25??mapping_mat.m
?????文件????????1265??2013-05-05?21:25??modu_8qam_cir.m
?????文件????????1250??2013-05-05?21:25??modu_8qam_mat.m
?????文件????????3560??2013-05-05?21:25??work1.m
?????文件????????1651??2013-05-05?21:25??work2.m
?????文件????????1553??2013-05-05?21:25??work3.m
?????文件????????1851??2013-05-05?21:25??work4.m