matlab_GPS中BOC信号的产生，功率谱密度仿真，自相关函数以及与C/A码的互相关仿真程序

function gcode = cacode(chiprate, fs, n_samples) Gcode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for i=1:1023 GCodeB(4*(i-1)+1)=bitget(hex2dec(Gcode(i)),1); GCodeB(4*(i-1)+2)=bitget(hex2dec(Gcode(i)),2); GCodeB(4*(i-1)+3)=bitget(hex2dec(Gcode(i)),3); GCodeB(4*(i-1)+4)=bitget(hex2dec(Gcode(i)),4);; end G=[GCodeB GCodeB GCodeB GCodeB]; G=[G G G G G G G G]; i=1:n_samples; gcode(i) = G(ceil((i/fs)*chiprate));