function?y=dem_16QAM（rasigma）

%?16QAM?demodulator?with?log-MAP?soft?output
%?
%???????r?---??received?complex?value?vector
%???????sigma?---?rms?of?noise
%???????a?----???channel?gain
%???????y?----??MAP?ouptputs?for??each?bit

cons16q???=[?3+3*j????3+j???1+3*j???1+j???3-3*j???3-j??1-3*j??1-j?...
??????-3+3*j?-3+j???-1+3*j??-1+j?-3-3*j??-3-j?-1-3*j?-1-j?];
cons?=?cons16q/rms（cons16q）;????????
code_book?=?de2bi（[0:15]4）‘;

r?=?r./a;
sigma=max（sqrt（0.1）sigma./a）;
y?=zeros（4length（r））;

for?n=1:length（r）
???M_d2?=exp（?-abs（r（n）-cons）.^2./sigma.^2）;
???temp1?=?sum（（ones（41）*M_d2.*code_book）‘）;
???temp2?=?sum（（?ones（41）*M_d2.*（~code_book）?）‘?）;
???y（:n）?=?log（?temp1）‘?-?log（temp2??）‘;
end????

y?=?y（:）‘/2;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????3425??2002-04-15?21:46??test.m

?????文件????????626??2002-04-15?21:43??dem_8PSK.m

?????文件????????295??2002-04-15?21:43??dem_QPSK.m

?????文件???????1270??2002-04-15?21:43??intlv_2000.m

?????文件????????391??2002-04-15?21:43??intlv_block.m

?????文件???????2479??2002-04-15?21:43??logmap.m

?????文件????????412??2002-04-15?21:43??mod_16QAM.m

?????文件????????268??2002-04-15?21:43??mod_8PSK.m

?????文件????????195??2002-04-15?21:43??mod_QPSK.m

?????文件?????????76??2002-04-15?21:43??rms.m

?????文件???????1100??2002-04-15?21:43??tc_cenc.m

?????文件???????1966??2002-04-15?21:43??tc_dec.m

?????文件???????1588??2002-04-15?21:43??tc_dec2.m

?????文件???????1608??2002-04-15?21:45??tc_dec2b.m

?????文件???????1630??2002-04-15?21:45??tc_dec3.m

?????文件???????1623??2002-04-15?21:45??tc_dec32.m

?????文件???????1634??2002-04-15?21:45??tc_dec32b.m

?????文件???????1688??2002-04-15?21:45??tc_enc.m

?????文件???????1276??2002-04-15?21:45??tc_enc2.m

?????文件???????1304??2002-04-15?21:45??tc_enc3.m

?????文件???????1289??2002-04-15?21:45??tc_enc32.m

?????文件??????38400??2002-04-15?21:46??tc_mod.xls

?????文件???????1372??2002-04-15?21:46??tc_rsc3.m

?????文件???????1750??2002-04-15?21:46??tc2_16QAM.m

?????文件???????1737??2002-04-15?21:46??tc2_8PSK.m

?????文件???????1929??2002-04-15?21:46??tc2qpsk.m

?????文件???????1893??2002-04-15?21:46??tc3_8PSK.m

?????文件???????1755??2002-04-15?21:46??tc32_16QAM.m

?????文件???????1771??2002-04-15?21:46??tc32_8PSK.m

?????文件???????1899??2002-04-15?21:46??tc32qpsk.m

............此處省略10個文件信息