%編出AMI波形，經過升余弦滾降系統，輸出波形，經過信道疊加噪聲，畫眼圖
clear?all;
close?all;
clc;
TB=1;%碼元間隔1s
N_data=5000;%碼元點數
N=15;%每碼元采樣點數，奇數個點
dt=TB/N;%采樣間隔
d=round（rand（N_data））;
ami=zeros（1N*N_data）;%產生一個1行N*N_data列的零矩陣
s=[];
k=1;
%產生AMI信號
for?i=1:N_data
????if?d（i）==1%如果輸入為1
????????ami（i*N-（N-1）/2）=-k;%極性與前一個相反
????????s1=ones（1N）;%產生一個1行N列的全1矩陣
????????k=-k;
????else
????????s1=zeros（1N）;
????end
????s=[s?s1];
end

t1=dt:dt:N_data;
figure（1）
subplot（411）
plot（t1s）;axis（[0?10?-0.2?1.2]）;title（‘單極性不歸零波形‘）;
subplot（412）
plot（ami）;axis（[0?10*N?-1.2?1.2]）;title（‘AMI信號不歸零波形‘）;

%升余弦
t=-3*TB:dt:3*TB;
ht=sinc（t/TB）.*（cos（pi*t/TB））./（1-4*t.^2/TB^2+eps）;
rcos=conv（amiht）;

tt=-3*TB:dt:（N_data+3）*TB-dt;
subplot（413）
plot（ttrcos）;grid?on;
axis（[0?10?-1.3?1.3]）;
xlabel（‘t/TB‘）;

?屬性????????????大小?????日期????時間???名稱
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?????文件??????37464??2016-11-30?23:54??MATLAB\1.jpg

?????文件??????37567??2016-12-12?19:58??MATLAB\5.jpg

?????文件???????1093??2016-12-12?20:21??MATLAB\AMI_rcos_yantu.m

?????文件???????2169??2016-12-14?08:59??MATLAB\basewave_PSD.m

?????文件???????1039??2016-11-30?15:54??MATLAB\eyediagram.m

?????文件??????76589??2016-12-14?21:35??MATLAB\M\ask?（2）.jpg

?????文件???????1282??2016-12-14?21:34??MATLAB\M\ASK.m

?????文件????????563??2016-11-20?20:38??MATLAB\M\dnrz.m

?????文件????????597??2016-11-20?20:36??MATLAB\M\DRZ.m

?????文件???????1074??2016-11-09?09:41??MATLAB\M\DSB.m

?????文件?????106600??2016-12-14?21:32??MATLAB\M\fsk?（2）.jpg

?????文件???????1348??2016-12-14?21:38??MATLAB\M\FSK.m

?????文件??????87319??2016-12-14?21:37??MATLAB\M\psk?（2）.jpg

?????文件???????1337??2016-12-14?21:36??MATLAB\M\PSK.m

?????文件????????281??2016-11-28?20:59??MATLAB\M\second\amiht.m

?????文件???????1759??2016-12-12?21:21??MATLAB\M\second\amipower.m

?????文件???????1045??2016-11-28?20:53??MATLAB\M\second\amipower1.m

?????文件????????429??2016-11-28?20:57??MATLAB\M\second\amirz.m

?????文件???????7511??2016-11-20?18:49??MATLAB\M\second\DSB.png

?????文件???????5336??2016-11-20?18:49??MATLAB\M\second\DSB頻譜.png

?????文件????????420??2016-11-28?20:58??MATLAB\M\second\snrz.m

?????文件????????425??2016-11-28?20:55??MATLAB\M\second\snrz1.m

?????文件????????479??2016-11-28?20:56??MATLAB\M\second\srz.m

?????文件????????480??2016-11-28?20:56??MATLAB\M\second\srz1.m

?????文件????????148??2016-11-28?08:08??MATLAB\M\second\t2f.m

?????文件???????2235??2016-11-20?19:00??MATLAB\M\second\tongxin1.m

?????文件???????4383??2016-11-20?21:54??MATLAB\M\second\單不歸.png

?????文件???????4085??2016-11-20?22:20??MATLAB\M\second\單歸.png

?????文件???????4168??2016-11-20?22:03??MATLAB\M\second\雙極性不歸零碼.png

?????文件???????4681??2016-11-20?22:28??MATLAB\M\second\雙極性歸零.png

............此處省略57個文件信息