clear?x;
x=demodz;

clear?prob0;
clear?prob1;
prob0=zeros（1lieH）;
prob1=zeros（1lieH）;

for?a=1:lieH
????prob1（1a）=1/（1+exp（x（1a）*2/sigma^2））;
????prob0（1a）=1-prob1（1a）;
end

q0=zeros（hangHlieH）;
q1=zeros（hangHlieH）;
r0=zeros（hangHlieH）;
r1=zeros（hangHlieH）;

for?i=1:lieH
????for?jo=1:liezhong
????????q0（ncol（joi）i）=prob0（1i）;
????????q1（ncol（joi）i）=prob1（1i）;
????end
end




for?lp=1:20
????for?i=1:hangH
????????for?jo=1:hangzhong
????????????delta=1;
????????????for?l=1:hangzhong
????????????????if?l~=jo
????????????????????delta=delta*（1-2*q1（inrow（il）））;
????????????????end
????????????end
????????????r0（inrow（ijo））=0.5+0.5*delta;
????????????r1（inrow（ijo））=1-r0（inrow（ijo））;
????????end
????end

????for?i=1:lieH
????????for?jo=1:liezhong
????????????alpha1=1;
????????????alpha2=1;
????????????alpha3=1;
????????????alpha4=1;
????????????for?l=1:liezhong
????????????????if?l~=jo
????????????????????alpha1=alpha1*r0（ncol（li）i）;
????????????????????alpha2=alpha2*r1（ncol（li）i）;
????????????????end
????????????end
????????????%---------------------------------------------------
????????????if?（prob0（1i）*alpha1+prob1（1i）*alpha2）==0
????????????????alpha3=1;
????????????else?alpha3=1/（prob0（1i）*alpha1+prob1（1i）*alpha2）;
????????????end
????????????%----------------------------------------------------
????????????q0（ncol（joi）i）=alpha3*prob0（1i）*alpha1;
????????????q1（ncol（joi）i）=alpha3*prob1（1i）*alpha2;
????????end
????end

????
????Q0=zeros（1lieH）;
????Q1=zeros（1lieH）;
????for?i=1:lieH
????????delta1=1;
????????delta2=1;
????????for?jo=1:3
????????????delta1=delta1*r0（ncol（joi）i）;
????????????delta2=delta2*r1（ncol（joi）i）;
????????end
????????if?（prob0（1i）*delta1+prob1（1i）*delta2）==0
????????????delta3=1;
????????else?delta3=1/（prob0（1i）*delta1+prob1（1i）*delta2）;
????????end
????????Q0（1i）=delta3*prob0（1i）*delta1;
????end
????
????decoded=zeros（1lieH）;
????for?i=1:lieH
????????if?Q0（1i）<0.5
????????????decoded（1i）=1;
????????end
????end
????
????clear?check;
????check=H*decoded‘;
????biaozhi=0;
????
????for?i=1:hangH
????????if?mod（check（i1）2）==1
????????????biaozhi=1;
????????????break;
????????end
????end
????
????if?biaozhi==0
????????break;
????end
end

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????9212??2009-04-05?17:42??DSSS\carrier_demod_out.mat

?????文件???????2350??2008-06-26?11:08??DSSS\decode.m

?????文件????????250??2012-05-08?13:49??DSSS\decode_out.mat

?????文件?????972845??2009-06-14?14:20??DSSS\dsss.mdl

?????文件????????405??2011-06-28?13:35??DSSS\Dsss_Bpsk_Matable\channel.m

?????文件????????329??2011-06-28?12:12??DSSS\Dsss_Bpsk_Matable\deDsss.m

?????文件????????293??2011-06-29?18:46??DSSS\Dsss_Bpsk_Matable\dePsk.m

?????文件????????437??2011-06-28?11:41??DSSS\Dsss_Bpsk_Matable\dsss.m

?????文件????????178??2011-06-26?11:33??DSSS\Dsss_Bpsk_Matable\expand.m

?????文件????????790??2011-06-29?18:48??DSSS\Dsss_Bpsk_Matable\lowpass.m

?????文件???????4518??2011-06-27?16:11??DSSS\Dsss_Bpsk_Matable\lpass.mat

?????文件???????2838??2011-06-28?14:06??DSSS\Dsss_Bpsk_Matable\main.m

?????文件????????388??2011-06-28?11:38??DSSS\Dsss_Bpsk_Matable\mSequence.m

?????文件????????262??2011-06-26?13:28??DSSS\Dsss_Bpsk_Matable\PSk.m

?????文件???????1785??2005-06-14?15:18??DSSS\DSSS_Matlab程序\dsss.m

?????文件???????2018??2005-06-14?15:13??DSSS\DSSS_Matlab程序\gold_generator.m

?????文件???????1132??2005-06-14?15:10??DSSS\DSSS_Matlab程序\pn_generator.m

?????文件???????1098??2007-04-22?14:07??DSSS\encode.m

?????文件???????9173??2009-06-14?15:02??DSSS\encode_in.mat

?????文件???????3299??2009-06-16?11:05??DSSS\encode_out.mat

?????文件???????8440??2007-05-09?00:47??DSSS\generate_h.m

?????文件????????588??2012-05-08?19:54??DSSS\main.asv

?????文件???????1028??2009-06-16?09:47??DSSS\main_decode.m

?????文件????????202??2009-06-14?15:03??DSSS\main_encode.m

?????目錄??????????0??2012-05-30?00:15??DSSS\Dsss_Bpsk_Matable

?????目錄??????????0??2011-03-12?10:22??DSSS\DSSS_Matlab程序

?????目錄??????????0??2012-05-21?12:11??DSSS

-----------?---------??----------?-----??----

??????????????1023858????????????????????27



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