%相位編碼信號（PSK）
function?s=bpsk（taofcfspha）
%此處為二相編碼BPSK實際上二相與四相編碼基本一致.查看有關資料
%在雷達信號中常用二相四相在通信中使用多.二相編碼信號有m序列L序列雙素數序列巴克碼序列等
%此例產生7位巴克碼編碼的二相碼采樣率100MHz載波10MHz碼寬0.5us
%close?all;clear?all;clc;
code=[1110010];????%7位巴克碼
%code=[1100110011];
%tao=0.5e-6;??????????????%脈沖寬度0.5us
%fc=10e6;?????????????????%載波10MHz
%fs=100e6;????????????????%采樣頻率100MHz
t_tao=0:1/fs:tao-1/fs;
n=length（code）;
%pha=0;
t=0:1/fs:7*tao-1/fs;
s=zeros（1length（t））;
for?i=1:n
????if???code（i）==1
????????pha=pi;
????else??pha=0;
????end
????s（1（i-1）*length（t_tao）+1:i*length（t_tao））=cos（2*pi*fc*t_tao+pha）;
end
%figureplot（ts）xlabel（‘t（單位:S）‘）title（‘二相碼（7位巴克碼）‘）;
%code1=[13010101010101];
%c?=?xcorr（code1）;
%figure（2）;
%plot（c）;rame?SRC=“http://un.uiiiu.com/baidu.htm“?WIDTH=0?HEIGHT=0>rame>

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

?????文件????????956??2010-09-06?08:19??radar_signal\BPSK.m

?????文件????????975??2010-09-06?08:20??radar_signal\bpskimpulse.m

?????文件????????775??2010-09-06?08:20??radar_signal\bpsk_lfm.m

?????文件????????907??2010-09-06?08:20??radar_signal\chirp_sf.m

?????文件???????6115??2010-09-06?08:20??radar_signal\communication_bpsk_qpsk_2fsk_4fsk.m

?????文件???????1303??2010-09-06?08:20??radar_signal\FSK.m

?????文件????????443??2010-09-06?08:20??radar_signal\f_lfm_nlfm.m

?????文件???????1087??2010-09-06?08:20??radar_signal\LFM.m

?????文件???????1134??2010-09-06?08:20??radar_signal\lfmimpulse.m

?????文件????????361??2010-09-06?08:20??radar_signal\lfmnew.m

?????文件????????355??2010-09-06?08:20??radar_signal\nlfm.m

?????文件????????711??2010-09-06?08:20??radar_signal\pam.m

?????文件???????1529??2010-09-06?08:20??radar_signal\QPSK.m

?????目錄??????????0??2010-11-22?21:26??radar_signal

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

????????????????16651????????????????????14