Experimental Study on Full-Polarization Micro-Doppler of ...
Transcript of Experimental Study on Full-Polarization Micro-Doppler of ...
Experimental Study on Full-Polarization Micro-Doppler
of Space Precession Targetin Microwave Anechoic Chamber
Liu Jin
National University of Defense Technology
Changsha, Hunan China
1. Introduction
2. Wide-band Scattering Properties
3. Full-Polarization Micro-Doppler Model
4. Experiment Results Analysis
2. Wide-band Scattering Properties
losR
1Π
2Π
Nose structer: Ideal scatterer
Ring structer: Sliding scatterer
3. Full-Polarization Micro-Doppler Model
0( ) ( ) 2( ) ( ) exp( 2 )
( ) ( )HHr HVr t
VHr VVr
s t s t f Rt t j
s t s t c
rs S
precession angle
p
O
o
l
rp
r
tR0R
average aspect angle
initial angle
coning frequencyposition
3. Full-Polarization Micro-Doppler Model
losR
1Π
2Π
Sine Function Type
0 02 sin 21 sin cos( )2
ij p tdij p
d f f d Rf z t
dt c c dt
Influence of the polarization matrix phase Ignorable distance
3. Full-Polarization Micro-Doppler Model
losR
1Π
2Π
01
2
21 ( cos sin sin sin( )2
sin sin sin sin( )(cos cos sin sin cos( )))
1 (cos cos sin sin cos( ))
ijdij p p
p p p
p
d kff t
dt ct t
t
02
2
21 ( cos sin sin sin( )2
sin sin sin sin( )(cos cos sin sin cos( )))
1 (cos cos sin sin cos( ))
ijdij p p
p p p
p
d kff t
dt ct t
t
Non-Sine Function Type
4. Experiment results analysis
Time /s
Freq
uenc
y /H
z
0 2 4 6 8 10 12 14 16 18
-15
-10
-5
0
5
10
15
Time /s
Freq
uenc
y /H
z
0 2 4 6 8 10 12 14 16 18
-15
-10
-5
0
5
10
15
4. Experiment results analysis
时间 /s
频率
/Hz
0 5 10 15-15
-10
-5
0
5
10
15
时间 /s
频率
/Hz
0 5 10 15-15
-10
-5
0
5
10
15
4. Experiment results analysis
Measuerd
Theoretical