clc
close?all
clear?all

Fs?=?50e6;
Fi?=?500e3;
Fd?=?150;
DoppRate?=?2000;

T?=?1/Fs;

iniPhase?=?pi/3;
FLL.freq?=?0;
PLL.phase?=?0;


FLL_LOCK?=?1;
FLL_NUMBER?=?20;
fll_flag?=?0;
fll_flag_cnt?=?0;
CORRE_T?=?0.001;
CorrLen?=?CORRE_T*Fs;

PLL_LOCK?=?0.2;
PLL_NUMBER?=?20;
pll_flag_cnt?=?0;

pll_flag?=?0;
pll_unlock?=?0;
PLL_UNLOCK?=?1;
PLL_UNLOCK_NUM?=?20;
pll_unlock_cnt?=?0;
pll_first_lock?=?0;


%---------------------------環路濾波器參數----------------------------------%
FLL.Bn?=?6;
PLL.Bn?=?15;
???
FLL.natureFreq?=?FLL.Bn/0.53;
fll_para_a?????=?FLL.natureFreq^2;
fll_para_b?????=?FLL.natureFreq?*?1.414;
????
PLL.natureFreq?=?PLL.Bn?/0.7845;
pll_para_a?????=?PLL.natureFreq^3;
pll_para_b?????=?PLL.natureFreq^2?*?1.1;
pll_para_c?????=?PLL.natureFreq^1?*?2.4;


t_integral?=?CORRE_T*2;
old_accelerate_sum?=?0.0;??
old_velocity_sum???=?0.0;????????
old_sum_temp???????=?0.0;
old_temp???????????=?0.0;
%--------------------------------------------------------------------------%

simCnt?=?1;
SimNum?=?6000;
FreqErrBuf??=?zeros（1SimNum）;
PhaseErrBuf?=?zeros（1SimNum）;
RxFc?=?Fi;
TwoPi?=?2*pi;
TxIniPhase?=?pi/3;
RxIniPhase?=?0/4;

FreqErrConst?=?1/（2?*?pi）/?CORRE_T;
t?=?[0:CorrLen*2-1]*T;

Cnr?=?45;
Snr?=?Cnr?-?10*log10（Fs）;
accelerate_sum?=?0;
velocity_sum?=?0;
T_integ?=?t_integral;
%?????cos（wt+b）?=?cos（wt）*cos（b）?-?sin（wt）*sin（b）;
%?????sin（wt+b）?=?sin（wt）*cos（b）?+?cos（wt）*sin（b）;
while（simCnt<=SimNum）
????%-------------------------------發送端---------------------------------%
????TxFc????=?Fi?+?Fd?+?0.5*DoppRate*t;
????TxPhase?=?TwoPi*（TxFc.*t）?+?TxIniPhase;
????TxData??=?complex（cos（TxPhase）sin（TxPhase））;
????%-------------------------------高斯白噪聲-----------------------------%
%?????TxData??=?awgn（TxDataSnr‘measured‘）;
????%-------------------------------本地載波-------------------------------%????
????RxFc????=?Fi?+?FLL.freq;????
????RxPhase?=?TwoPi*（RxFc.*t）?+?PLL.phase?+?RxIniPhase;
????CarrNco?=?complex（cos（RxPhase）-sin（RxPhase））;
????%------------------------------下變頻----------------------------------%????
????baseband?=?TxData.*CarrNco;
????%------------------------------積分?
????CorrRes（1）?=?sum（baseband（1:CorrLen））;
????CorrRes（2）?=?sum（baseband（CorrLen+1:2*CorrLen））;
????I?=??real（CorrRes）;
????Q?=??imag（CorrRes）;??
????%------------------------------時間計算累加----------------------------%
????t?=?t?+?t_integral;
????%--------------------------------FLL----------------------------------%
????Case1?=?（0?==?fll_flag）;
????Case2?=?（1?==?pll_unlock）;
????Case3?=?（1?==?fll_flag）?&&?（0?==?pll_flag）?&&?（0?==pll_unlock）?&&?（0?==?pll_first_lock）;

????if（Case1?||?Case2?||?Case3）????
????%/*******?the?discriminator?of?fll?*******/	
????????dot???=?I（2）*I（1）?+?Q（2）*Q（1）;
????????cross?=?I（1）*Q（2）?-?I（2）*Q（1）;????
%???????CarrFreqErr?=?（atan2（crossdot））*FreqErrConst;%四象限反正切，對數據跳變敏感?，牽引線性頻率范圍：?[-0.50/T~0.50/T]
?????????CarrFreqErr?=?（atan（cross/dot））*FreqErrConst;%二象限

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

????......R??????7054??2006-06-01?19:37??鎖相環\AGC\AGC.m

????.......??????2162??2016-09-29?10:12??鎖相環\AGC.rar

????.......??????3175??2016-11-03?11:20??鎖相環\costas--m\costas?-?副本.m

????.......??????1421??2009-10-14?10:57??鎖相環\costas--m\costas.m

????.......??????1419??2011-04-28?17:28??鎖相環\costas--m\costas.txt

????.......??????3033??2016-11-04?09:54??鎖相環\costas--m\costas1.m

????.......??????1918??2016-11-03?09:55??鎖相環\costas--m.rar

????.......??????6965??2016-09-06?14:00??鎖相環\FLL_PLL_Sim.m

????.......??????1927??2016-12-15?17:59??鎖相環\FLL_PLL_Sim.rar

????.......???1414303??2016-12-13?22:12??鎖相環\FPLL載波跟蹤環仿真及高動態GPS信號測試_劉曉莉.pdf

????.......???4555729??2016-11-03?16:10??鎖相環\gps-matlab.zip

????.......????740571??2016-12-13?22:47??鎖相環\GPS信號差分相干累積捕獲技術_胡輝.pdf

????.......????629306??2016-12-13?22:31??鎖相環\GPS信號結構及其測距碼研究_苗正戈.pdf

????.......???1008048??2016-11-03?09:45??鎖相環\Simulation-and-FPGA-Implementation-of-DigitalDBPSK-Direct-Spread-Spectrum-System-Receiver.rar

????.......??????3809??2011-08-30?15:46??鎖相環\Tracking\Tracking\track_2nd.m

????.......??????4303??2011-03-27?14:34??鎖相環\Tracking\Tracking\track_3rd.m

????.......??????3153??2016-11-03?17:40??鎖相環\Tracking.rar

????.......???1078518??2016-11-04?10:46??鎖相環\基于COSTAS環路matlab仿真文檔.pdf

????.......????562051??2016-12-13?22:13??鎖相環\基于FLL_PLL的載波跟蹤環路設計_鄧曉東.pdf

????.......????162035??2016-12-13?22:16??鎖相環\基于FLL_PLL相結合的載波跟蹤在導航接收機中的應用_沈鋒.pdf

????.......???2025839??2016-12-14?16:31??鎖相環\基于FPGA的低雜散DDS的技術研究_黃仙兵.caj

????.......????857440??2016-12-13?22:19??鎖相環\應用PID思想的高動態GPS載波跟蹤環路設計_高帥和.pdf

????.......???1031168??2005-05-12?11:53??鎖相環\鎖相技術_張厥盛.rar\鎖相技術?張厥盛?529頁?7.5M?PPT版\第1章???鎖相環路的基本工作原理?57頁?1.0M.ppt

????.......???1665536??2005-05-12?11:53??鎖相環\鎖相技術_張厥盛.rar\鎖相技術?張厥盛?529頁?7.5M?PPT版\第2章???環路跟蹤性能?109頁?1.6M.ppt

????.......????550912??2005-05-12?11:53??鎖相環\鎖相技術_張厥盛.rar\鎖相技術?張厥盛?529頁?7.5M?PPT版\第3章???環路噪聲性能?54頁?0.5M.ppt

????.......????703488??2005-05-12?11:53??鎖相環\鎖相技術_張厥盛.rar\鎖相技術?張厥盛?529頁?7.5M?PPT版\第4章???環路捕獲性能?47頁?0.6M.ppt

????.......???1838080??2005-05-12?11:53??鎖相環\鎖相技術_張厥盛.rar\鎖相技術?張厥盛?529頁?7.5M?PPT版\第5章???集成鎖相環路?106頁?1.8M.ppt

????.......???2129408??2005-05-12?11:54??鎖相環\鎖相技術_張厥盛.rar\鎖相技術?張厥盛?529頁?7.5M?PPT版\第6章???鎖相環路的應用?156頁?2.0M.ppt

????.......???6214335??2016-11-03?17:02??鎖相環\鎖相技術_張厥盛.rar.rar

????.......????439645??2016-11-03?17:36??鎖相環\鎖頻環輔助下鎖相環的跟蹤誤差分析_王俊.pdf

............此處省略10個文件信息