%?PLL?illustration
clear?all;
close?all;
%?define?initial?phase?offset?and?incoming?Cw?frequency?and?Sampling?frequency
theta?=?pi/3;
f=1000;
fs=100000;
%?Create?the?real?and?imaginary?parts?of?a?Cw?non-modulated?Carrier?to?be?tracked.
k=1:1:1000;
delf=f/20;
Signal=exp（j*（2*pi*k*（f+delf）/fs+theta））+0.01*（rand（11000）+j*rand（11000））;
%?initilize?PLL?Loop
phi_hat（1）=30;
e（1）=0;
phd_output（1）=0;
nco（1）=0
%?define?Loop?filter?parameters
kp=0.15;?%?Proportional?constant
ki=0.1;?%?Integrator?constant
%?PLL?implementation
for?n=2:length（Signal）
nco（n）=conj（exp（j*（2*pi*n*f/fs+phi_hat（n-1））））;?%?Compute?nCO
phd_output（n）=imag（Signal（n）*nco（n））;?%?Complex?multiply?nCO?x?input
e（n）=e（n-1）+（kp+ki）*phd_output（n）-ki*phd_output（n-1）;?%?Filter?integrator
some（n）=（kp+ki）*phd_output

?屬性????????????大小?????日期????時間???名稱
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?????文件???????1436??2005-09-09?17:13??DPLL.m

?????文件????????218??2007-01-22?19:53??www.pudn.com.txt

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?????????????????1654????????????????????2