%?p7?1.m?performs?acquisition?on?collected?data
%?2007.8.22-實際的相關峰并不是完全對稱－－為什么？？－不方便做仿真
%?%?2009.6.11023長度3069碼率捕獲的SNR取決于什么？？
%?%?2009.6.4插值，抽取－或利用積分清洗實現低通？進行FFT如何仿真，
%?%?2009.6.6FFLL的跟蹤結果，竟然不好，不如sim原來的？？？
clear;format?long?g;clc;
f0_code=1.023e6;
gold_rate=??1???*1.023e6;????%?%?%?%偽碼速率3.069M

svnum=1?????????????;%GPS?1?號碼
f0=4.2e6;;;;;9.466e6;
fs=4*f0;????%?***?sampling?freq
fc=f0;???;?%?***?center?freq?without?Doppler
ts=1/fs;?%?***?sampling?time

file_sec=0.005;
nums=file_sec*fs;

fd=0;sigama=fd/682;%?%?%?%??doppler
fd_dot=0000;?%??doppler?rate
code=digitizg_gold_rate（numsfs0.0000svnumsigamagold_rate）;%%%code??offset?

signal=code.*cos（2*pi*（fc+fd）.*ts*[0:nums-1]+pi*fd_dot*ts^2*[0:nums-1].^2）;

signal=awgn（signal0）‘;%???%?%??%?加噪聲
%?%?對signal?作移位－－檢測碼相位

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

?????文件???????4859??2010-03-19?09:23??matlab-acq\a_513gps_acq_test_3069M.m

?????文件???????6057??2010-03-18?15:18??matlab-acq\a_513gps_acq_test_3069Mbak.m

?????文件???????3260??2008-08-23?10:11??matlab-acq\a_caps_acq_beijing.asv

?????文件???????3260??2008-08-23?10:11??matlab-acq\a_caps_acq_beijing.m

?????文件???????1196??2008-06-02?10:36??matlab-acq\codegen.m

?????文件????????576??2008-07-24?16:34??matlab-acq\comp2dec.m

?????文件?????450122??2010-03-25?15:47??matlab-acq\data37864_sign_snr0_0Hz_0718.txt

?????文件?????455866??2010-03-25?15:47??matlab-acq\data37864_unsign_snr0_0Hz_0718.txt

?????文件????????935??2008-12-28?22:33??matlab-acq\dec2comp.m

?????文件???????1419??2007-04-30?09:15??matlab-acq\digitizg.m

?????文件???????1497??2010-03-18?15:00??matlab-acq\digitizg_gold_rate.m

?????文件?????168000??2010-03-25?15:51??matlab-acq\simdata_513

?????目錄??????????0??2010-03-25?21:53??matlab-acq

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??????????????1097047????????????????????13