gpssignal.m

gps c/a码程序以及模拟卫星定位的源代码、地球模型

clear
close all;
x1=10.23;y1=6.24;z1=17.8;
Code1=fGenerateNavigationData(x1,y1,z1);
index1=find(Code1==0);
Code1(index1)=-ones(1,length(index1));
SvNum=12;
Code2=zeros(1,1);
Temp=fGenerateCAcode3(SvNum);
index1=find(Temp==0);
Temp(index1)=-ones(1,length(index1));
Temp=[Temp Temp Temp Temp Temp];
for i=1:length(Code1)
    Code2=[Code2 Code1(1,i)*Temp]; 
end
Code2=Code2(2:length(Code2));
SinWave=sin([0:2*pi/8;2*pi*7/8]);
SinWave=single(SinWave);
GPSsignal=zeros(1,1);
SinWave=[SinWave SinWave SinWave SinWave SinWave];
for i=1:length(Code2)
    GPSsignal=[GPSsignal Code2(1,i)*SinWave];
end
GPSsignal=GPSsignal(2:length(GPSsignal));