UWB Two-Cluster AOA Tracking Prototype System Design

2006·1.5 MB·English

by  Ngo, Phong H.

UWB Two-Cluster AOA Tracking Prototype System Design
Abstract
This presentation discusses a design effort for a prototype ultra-wideband (UWB) tracking system
that is currently under development at NASA Johnson Space Center (JSC). The system is being studied
for use in tracking of lunar/Mars rovers during early exploration missions when satellite navigation
systems are not available. The UWB technology is exploited to implement the tracking system due to its
properties such as fine time resolution, low power spectral density and multipath immunity. A two-
cluster prototype design using commercially available UWB radios is employed to implement the Angle
of Arrival (AOA) tracking methodology in this design effort. In order to increase the tracking range, low
noise amplifiers (LNA) and high gain horns are used at the receiving sides. Field tests were conducted
jointly with the Science and Crew Operation Utility Testbed (SCOUT) vehicle near the Meteor Crater in
Arizona to test the tracking capability for a moving target in an operational environment. These tests
demonstrate that the UWB tracking system can co-exist with other on-board radio frequency (RF)
communication systems (such as Global Positioning System (GPS), video, voice and telemetry systems),
and that a tracking resolution less than 1% of the range can be achieved.
i
N
1

)
d
i
v r
g a
D e
n
( V t
i n
k n
n u 4
E
j
c g n V e
a a
i Ji E / C
r s
, n
T e sl
D u / o e
A o D p i
c
s
O m g hn u i a
v
N o o
A e J i p
r
, D
t s G S
r s g os
e
y r s
t n G s m n
s S m
a
o o
u li e
e h u e t s
l J
C p P n, st ys n
o- ty ha y S h
P S
w o o
u c
t
a B i J
T o h n
r C W
B P , o A
t
d i
W n U v
S
r A
A
U A

y
e
k N
c
i
D
2
-
s
) s
n s o
o o r
e
i i C
t d g
a (
a n
or R D a
l w P R
p 0
x e 0 C g
E vi 2 C n e
r i l
e e e N t k c
s
c c i
n v O e h k
a a
i p O y s Tn) r e or
tl S n h ul o o T V W
u g p P tti e T
O g for Desi oso WB ent etec e th OU ure
n hil U mD s C ut
ki m P ri a S F
rac ste gn e – xpeeak ncre ith nd
T y si ar EP I w a
( S e w y n o s n
n
atio ype m D ard atoratio ds t Test usio
v ot e H orel ho d cl
ti ot st y brr t l n
o r y e ao e e o
M P S K LC M Fi C
3
n
o
i
t
a
r
o
l
p
x
E

e
c
a
p
S

ne
r obl
o
ntia s
f oal r
i
iga a
g dy atviv M
n anrloraa as/
alnt ar
ki rs expn no lene
c eoree cup
Tra ng rovauts fMars ns whes are T vehid for Lrototy
p
in/ot Ue
k r i
coasiell Ober
atrnst Cstv
rsumia eo
TaL s S
tr
4
n
o
i
t
u
l
o
s
e
R

e
m
i
T

e
n
i
F

B
W
U
)
a
/
3
4
τ
c
5
2 ( 4
θ A
s s I
o o I

c C 2 r
e
a c a Rx t
s
n r u
≈ a 2 l
g 3 ≈ θ C
4
i τ 2 a
s c θ r2 >
e >
3
A 2
D r

,
1
r

r n:
e o
i
t X pt
T d
s m
u
u s
s
A
l
C
d
l
e
i
F
o
w a) r1 ar
F
/ 2
2 A
T 1
τ
1 I
c θ
r
θ1 ( 1 e
s s a Rx st
o o u
c C Cl
2
c 1 1
a τ θ
r
≈ a c

2 ≈
1
cτ θ1 A1
x
R
n
6
a i
d a
t
n n t
a
b )
a o
D l
o a
i
x t v
a
A o
T i
m r
t
O r
n l A
i l
D e t e
s
e w f
T e o
w

g a s e
t
n e t k c
a
r
i b n
s d o
e
U n w
) r
o y e
f i a n f
o t o f
a w i
D
i
s z t
-
a
e i e
n e
l
g n e
o m
a o r
r
r
t h ( i
o T
n
c x
a c (
n e
-
v A
y l s
d p
s s O
A m o
o D
r
i
N S C T
)
o
7
i
d
a
R

0
0
2

N
O
s
l
u
P

B
W
U

(

s
t r
n o
e t
a
m t
r i
e K
i
r
n
e n
e
p o
G
x i
t
E a
l
a u
b
n l
a a
g
L v
i
S E
s
n
o

g s
i
c t 8
s n a
i
p i s c
d
b z u y li
M H h p
l
s G c p p
6 n - A
n 9. 7 (i B
o , 4. s W ed
s m U
ati Hz bp ely te of edd
M M at s b
c y t
6 8 m s ul m
fi 9. 4. xi z s es 9 E
ci ): …, ro GH es r 20 or
e cy , pp 2 el s a 5. r f
p n s a . ir a 1 o
S ue bp ): : 3 w y 7, ss
q k d ) d t 1 e
0 Fre 150 iate ated ase muni g 15.5 na roc
0 n , ad di -b m in C en op
2 io ps (r ra US i ck C nt cr
On petit 5 kb ncy dB m all path n tra t -F le A M Mi
e 7 e 0 B h i n o
R u 1 d t lt o a p Tt
Puls ulse rates: Freq idth ( 11.5 sts wi or mu soluti ompli nd Di ARM pmen
F (P ata nter ndw P: - exiS) peri e re C C mo ongvelo
R d e a R o-P u n C a re
P 8 C B EI CG S Fi F Di StD
9
)
p
u
t
e
s
(

s
t
n
e
m
i
r
e
p
x
E

b
a
L