%?************************beginning?of?file********************************
%???Module:??????ca_generator.m?
%???Note:????????此函數(shù)用于產(chǎn)生不同的PRN號(hào)衛(wèi)星的C/A序列
%???Parameter:
%?????????????????w????????表示衛(wèi)星的PRN號(hào)
%?????????????????T????????表示總的仿真時(shí)間?
%?????????????????fca??????C/A碼的碼率
%?????????????????CAcode???輸出產(chǎn)生的C/A序列
%**************************************************************************

function?[CAcode]=ca_generator（wTfca）
???????%?數(shù)據(jù)跳變時(shí)間單位?
Tca=1/?fca;???????????????%C/A每個(gè)碼片時(shí)間間隔??
tca=0:Tca:T;?????????????%擴(kuò)頻碼時(shí)間序列
Table=[??2???6;??????????%列出抽頭選擇，1-37顆的衛(wèi)星PNR號(hào)選擇
?????????3???7;
?????????4???8;
?????????5???9;
?????????1???9;
?????????2???10;
?????????1???8;
?????????2???9;
?????????3???10;
?????????2???3;
?????????3???4;
?????????5???6;
?????????6???7;
?????????7???8;
?????????8???9;
?????????9???10;
?????????1???4;
?????????2???5;
?????????3???6;
?????????4???7;
?????????5???8;
?????????6???9;
?????????1???3;
?????????4???6;
?????????5???7;?
?????????6???8;
?????????7???9;
?????????8???10;
?????????1???6;
?????????2???7;
?????????3???8;
?????????4???9;
?????????5???10;
?????????4???10;
?????????1???7;
?????????2???8;
?????????4???10];????
j=0;???????????????????????????????????????????%計(jì)數(shù)的初值設(shè)置
CAsequence=[];
for?i=0:Tca:T????????????