<s>
In	O
radar	B-Application
technology	O
and	O
similar	O
fields	O
,	O
track-before-detect	B-Algorithm
(	O
TBD	O
)	O
is	O
a	O
concept	O
according	O
to	O
which	O
a	O
signal	O
is	O
tracked	B-Algorithm
before	O
declaring	O
it	O
a	O
target	O
.	O
</s>
