<s>
The	O
L	B-Algorithm
band	I-Algorithm
is	O
the	O
Institute	O
of	O
Electrical	O
and	O
Electronics	O
Engineers	O
(	O
IEEE	O
)	O
designation	O
for	O
the	O
range	O
of	O
frequencies	O
in	O
the	O
radio	B-Algorithm
spectrum	I-Algorithm
from	O
1	O
to	O
2	O
gigahertz	O
(	O
GHz	O
)	O
.	O
</s>
<s>
In	O
Europe	O
,	O
the	O
Electronic	O
Communications	O
Committee	O
(	O
ECC	O
)	O
of	O
the	O
European	O
Conference	O
of	O
Postal	O
and	O
Telecommunications	O
Administrations	O
(	O
CEPT	O
)	O
has	O
harmonized	O
part	O
of	O
the	O
L	B-Algorithm
band	I-Algorithm
(	O
1452	O
–	O
1492MHz	O
)	O
,	O
allowing	O
individual	O
countries	O
to	O
adopt	O
this	O
spectrum	O
for	O
terrestrial	O
mobile/fixed	O
communications	O
networks	O
supplemental	O
downlink	O
(	O
MFCN	O
SDL	O
)	O
.	O
</s>
<s>
The	O
Global	O
Positioning	O
System	O
carriers	O
are	O
in	O
the	O
L	B-Algorithm
band	I-Algorithm
,	O
centered	O
at	O
1176.45MHz	O
(	O
L5	O
)	O
,	O
1227.60MHz	O
(	O
L2	O
)	O
,	O
1381.05MHz	O
(	O
L3	O
)	O
,	O
and	O
1575.42MHz	O
(	O
L1	O
)	O
frequencies	O
.	O
</s>
<s>
L	B-Algorithm
band	I-Algorithm
waves	O
are	O
used	O
for	O
GPS	O
units	O
because	O
they	O
are	O
able	O
to	O
penetrate	O
clouds	O
,	O
fog	O
,	O
rain	O
,	O
storms	O
,	O
and	O
vegetation	O
.	O
</s>
<s>
The	O
Galileo	O
Navigation	O
System	O
,	O
the	O
GLONASS	O
System	O
,	O
and	O
the	O
BeiDou	O
systems	O
use	O
the	O
L	B-Algorithm
band	I-Algorithm
similar	O
to	O
GPS	O
,	O
although	O
the	O
frequency	O
ranges	O
are	O
named	O
differently	O
.	O
</s>
<s>
Modern	O
receivers	O
,	O
such	O
as	O
those	O
found	O
in	O
smartphones	B-Application
,	O
are	O
able	O
to	O
take	O
advantage	O
of	O
multiple	O
systems	O
(	O
usually	O
only	O
around	O
the	O
oldest	O
L1	O
band	O
)	O
at	O
the	O
same	O
time	O
.	O
</s>
<s>
Iridium	O
Communications	O
2-way	O
messaging	O
service	O
Snapdragon	O
Satellite	O
will	O
utilize	O
frequencies	O
in	O
the	O
L	B-Algorithm
Band	I-Algorithm
as	O
well	O
.	O
</s>
<s>
The	O
aircraft	O
L-band	B-Algorithm
ranges	O
from	O
960	O
–	O
1215MHz	O
.	O
</s>
<s>
Aircraft	O
can	O
use	O
Automatic	B-Application
dependent	I-Application
surveillance-broadcast	I-Application
(	O
ADS-B	B-Application
)	O
equipment	O
at	O
1090MHz	O
to	O
communicate	O
position	O
information	O
to	O
the	O
ground	O
as	O
well	O
as	O
between	O
them	O
for	O
traffic	O
information	O
and	O
avoidance	O
.	O
</s>
<s>
The	O
1090MHz	O
frequency	O
(	O
paired	O
with	O
1030MHz	O
)	O
is	O
also	O
used	O
by	O
Mode	O
S	O
transponders	O
,	O
which	O
ADS-B	B-Application
augments	O
when	O
operated	O
at	O
this	O
frequency	O
.	O
</s>
<s>
ADS-B	B-Application
information	O
can	O
also	O
be	O
broadcast	O
on	O
the	O
L	B-Algorithm
band	I-Algorithm
frequency	O
of	O
978MHz	O
.	O
</s>
<s>
This	O
is	O
known	O
as	O
the	O
23-centimeter	B-Algorithm
band	I-Algorithm
by	O
radio	O
amateurs	O
and	O
as	O
the	O
L-band	B-Algorithm
by	O
AMSAT	O
.	O
</s>
<s>
In	O
the	O
United	O
States	O
and	O
overseas	O
territories	O
,	O
the	O
L	B-Algorithm
band	I-Algorithm
is	O
held	O
by	O
the	O
military	O
for	O
telemetry	O
,	O
thereby	O
forcing	O
digital	O
radio	O
to	O
in-band	O
on-channel	O
(	O
IBOC	O
)	O
solutions	O
.	O
</s>
<s>
Digital	O
Audio	O
Broadcasting	O
(	O
DAB	O
)	O
in	O
Europe	O
primarily	O
uses	O
Band	B-Algorithm
III	I-Algorithm
,	O
but	O
may	O
also	O
be	O
carried	O
in	O
the	O
1452	O
–	O
1492MHz	O
range	O
in	O
some	O
countries	O
.	O
</s>
<s>
DVB-H	B-Protocol
,	O
DVB-SH	O
,	O
and	O
DVB-T2	B-Protocol
can	O
operate	O
in	O
the	O
L	B-Algorithm
band	I-Algorithm
.	O
</s>
<s>
T-DMB	O
can	O
operate	O
in	O
the	O
L	B-Algorithm
band	I-Algorithm
.	O
</s>
<s>
Consequently	O
,	O
parts	O
of	O
the	O
L	B-Algorithm
band	I-Algorithm
are	O
protected	O
radio	O
astronomy	O
allocations	O
worldwide	O
.	O
</s>
