<s>
Spatial	B-Protocol
capacity	I-Protocol
is	O
an	O
indicator	O
of	O
"	O
data	O
intensity	O
"	O
in	O
a	O
transmission	O
medium	O
.	O
</s>
<s>
Spatial	B-Protocol
capacity	I-Protocol
focuses	O
not	O
only	O
on	O
bit	O
rates	O
for	O
data	O
transfer	O
but	O
on	O
bit	O
rates	O
available	O
in	O
confined	O
spaces	O
defined	O
by	O
short	O
transmission	O
ranges	O
.	O
</s>
<s>
Among	O
those	O
leading	O
research	O
in	O
spatial	B-Protocol
capacity	I-Protocol
are	O
Jan	O
Rabaey	O
at	O
the	O
University	O
of	O
California	O
,	O
Berkeley	O
.	O
</s>
<s>
Marc	O
Weiser	O
,	O
former	O
chief	O
technologist	O
of	O
Xerox	O
PARC	O
,	O
was	O
another	O
contributor	O
to	O
the	O
field	O
who	O
commented	O
on	O
the	O
importance	O
of	O
spatial	B-Protocol
capacity	I-Protocol
.	O
</s>
<s>
The	O
System	O
spectral	O
efficiency	O
is	O
the	O
spatial	B-Protocol
capacity	I-Protocol
divided	O
by	O
the	O
bandwidth	O
in	O
hertz	O
of	O
the	O
available	O
frequency	O
band	O
.	O
</s>
<s>
Engineers	O
at	O
Intel	O
and	O
elsewhere	O
have	O
reported	O
the	O
relative	O
spatial	B-Protocol
capacities	I-Protocol
of	O
various	O
wireless	O
technologies	O
as	O
follows	O
:	O
</s>
