資源簡介
對伽利略、北斗、GPS2等衛星使用的BOC調制信號的產生及其自相關函數的仿真。包含比較完整的程序集。
代碼片段和文件信息
M=1;
N=1;
fs=80e6;
ind=9900:10100;
t=0:1/fs:10000/fs;
f0=1.023e6;
%code=cacode(1N*1.023e6?fs100000);
code?=?gcode(N*1.023e6?fs?10000);
x=2*pi*f0*M*t(1:length(code));
Xnm1=code.*sign(exp(j*1*x));
Xnm1p=code.*sign(exp(-j*1*x));
Xnm3=code.*sign(exp(j*3*x));
Xnm3p=code.*sign(exp(-j*3*x));
Xnm5=code.*sign(exp(j*5*x));
Xnm5p=code.*sign(exp(-j*5*x));
Xnm7=code.*sign(exp(j*7*x));
Xnm7p=code.*sign(exp(-j*7*x));
CnmO=code.*sign(sin(x));
CnmQ=code.*sign(cos(x));
f?=?[0?0.02?0.02?1];?m?=?[1?1?0?0];
b?=?fir2(30fm);
%Cnm=filter(b1CnmO);
Cnm=CnmO;
figure(1)
subplot(311);
tmp=abs(fft(Xnm1));
plot(20*log10(fftshift(tmp)));
subplot(312);
tmp=abs(fft(Cnm));
plot(20*log10(fftshift(tmp)));
subplot(313);
tmp=abs(fft(code.*cos(3*x)));
plot(20*log10(fftshi
?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????1432??2006-08-03?22:23??BOC\boc.asv
?????文件???????1484??2011-03-05?12:43??BOC\boc.m
?????文件????????800??2006-06-23?15:07??BOC\boc_bak.m
?????文件???????1175??2006-07-04?16:53??BOC\cacode.m
?????文件???????1150??2006-06-02?16:06??BOC\codegen.m
?????文件???????1432??2006-07-04?16:53??BOC\gcode.m
?????文件?????????90??2006-08-20?00:24??BOC\Unti
?????目錄??????????0??2011-01-24?14:14??BOC
-----------?---------??----------?-----??----
?????????????????7563????????????????????8
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