<s>
The	O
Probabilistic	B-Algorithm
Data	I-Algorithm
Association	I-Algorithm
Filter	I-Algorithm
(	O
PDAF	O
)	O
is	O
a	O
statistical	O
approach	O
to	O
the	O
problem	O
of	O
plot	O
association	O
(	O
target-measurement	O
assignment	O
)	O
in	O
a	O
target	O
tracking	O
algorithm	O
.	O
</s>
<s>
Rather	O
than	O
choosing	O
the	O
most	O
likely	O
assignment	O
of	O
measurements	O
to	O
a	O
target	O
(	O
or	O
declaring	O
the	O
target	O
not	O
detected	O
or	O
a	O
measurement	O
to	O
be	O
a	O
false	O
alarm	O
)	O
,	O
the	O
PDAF	O
takes	O
an	O
expected	O
value	O
,	O
which	O
is	O
the	O
minimum	B-General_Concept
mean	I-General_Concept
square	I-General_Concept
error	I-General_Concept
(	O
MMSE	O
)	O
estimate	O
.	O
</s>
<s>
Whereas	O
the	O
PDAF	O
is	O
only	O
designed	O
to	O
track	O
a	O
single	O
target	O
in	O
the	O
presence	O
of	O
false	O
alarms	O
and	O
missed	O
detections	O
,	O
the	O
Joint	B-Algorithm
Probabilistic	I-Algorithm
Data	I-Algorithm
Association	I-Algorithm
Filter	I-Algorithm
(	O
JPDAF	B-Algorithm
)	O
can	O
handle	O
multiple	O
targets	O
.	O
</s>
<s>
The	O
first	O
real-world	O
application	O
of	O
the	O
PDAF	O
was	O
probably	O
in	O
the	O
Jindalee	O
Operational	O
Radar	O
Network	O
,	O
which	O
is	O
an	O
Australian	O
over-the-horizon	B-Architecture
radar	I-Architecture
(	O
OTHR	B-Architecture
)	O
network	O
.	O
</s>
<s>
Matlab	B-Language
:	O
The	O
PDAF	O
and	O
JPDAF	B-Algorithm
algorithms	O
are	O
implemented	O
in	O
the	O
singleScanUpdate	O
function	O
that	O
is	O
part	O
of	O
the	O
United	O
States	O
Naval	O
Research	O
Laboratory	O
's	O
free	O
Tracker	O
Component	O
Library	O
.	O
</s>
