JED - August 2013 - 32

ing LTE to places such as rural areas,
where it might never be available. It
was proposed as the perfect solution for
“bridging the digital divide” and would
combine high-power terrestrial base
stations with satellite-delivered L-band
signals that LightSquared could sell on
a wholesale basis to retailers that could
brand it as their own.
The fly in the ointment was that
its frequency allocation, for which it
was given approval by the FCC on more
than one occasion, was very near that

of GPS. In addition to its military use,
GPS provides geolocation capability, by
conservative estimates, to more than
500 million consumer devices in the US
alone, as well as to aircraft landing and
navigation systems, package tracking,
and dozens of other applications in industry. As GPS signals are very weak and
the signals from LightSquared would be
very strong, the latter would overwhelm
the former everywhere the two “met”
(which was essentially anywhere in the
continental US).

CellWorks

The Journal of Electronic Defense | August 2013

32

Flexible
Scalable
Effective

www.triasys.us
info@triasys.us
626020_Triasys.indd 1

LightSquared got to about the 50yard line when the Air Force, FAA, Fed
Ex, Caterpillar, more than a dozen other
companies and the entire GPS industry
woke up and realized that LightSquared
and GPS could not possibly operate in
close spectral proximity. The opponents
said LightSquared was either a threat to
National security or would destroy the
GPS industry and make consumer GPS
devices useless. LightSquared said GPS
manufacturers were too cheap to add
“five-cent filters” to their receivers,
which would have eliminated the potential for interference.
The FCC tried to hide its shame after approving a plan that anyone with
even a smattering of RF knowledge
would have realized was fatally flawed.
LightSquared agreed to move “down the
band.” Tests were performed (opponents
said they were rigged) that still showed
that LightSquared and GPS were not
compatible. In the end, LightSquared
went bankrupt and, currently, various
entities are trying to buy its assets. DOD
(and everyone else) won this no-brainer,
but DOD doesn’t always fare so well:
Digital Audio Broadcast (DAB): The
1992 World Administrative Radio Conference (WARC) allocated 1452 to 1492
MHz for satellite and terrestrial services, which happened to be in the middle
of a band used in the US for aeronautical
flight test telemetry. Users objected to
losing the band, and the US then chose
2310 to 2360 MHz for DAB instead, which
was also used for telemetry. In the end,
the telemetry users lost half the band,
which was allocated to non-government
uses.
Fixed Wireless Access (FWA): Radiolocation (radar) was allocated 3400 to
3700 MHz in most of the world until
1979 when WARC eliminated it, and suggested governments move their radars
to different frequencies. As the US was
not likely to move the radar frequencies used by its E-3 AWACS aircraft elsewhere, it ignored the ruling although
other countries adopted it. However, the
FWA community has continued to press
on, and DOD has fended off the challenges – so far.
“3G”: In the era of second-generation
wireless around 2000, WARC recommended certain bands be allocated for

13-01-30 7:38 PM


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JED - August 2013

Table of Contents for the Digital Edition of JED - August 2013

The View From Here
Conferences Calendar
Courses Calendar
From The President
Letters
The Monitor
Washington Report
World Report
The Spectrum Management Challenge: Creating Order From Chaos
Technology Survey: ELINT Receivers
EW 101
AOC News
Index of Advertisers
JED Quick Look
JED - August 2013 - cover1
JED - August 2013 - cover2
JED - August 2013 - 3
JED - August 2013 - 4
JED - August 2013 - 5
JED - August 2013 - The View From Here
JED - August 2013 - 7
JED - August 2013 - Conferences Calendar
JED - August 2013 - 9
JED - August 2013 - Courses Calendar
JED - August 2013 - 11
JED - August 2013 - From The President
JED - August 2013 - 13
JED - August 2013 - Letters
JED - August 2013 - The Monitor
JED - August 2013 - 16
JED - August 2013 - 17
JED - August 2013 - 18
JED - August 2013 - 19
JED - August 2013 - 20
JED - August 2013 - 21
JED - August 2013 - Washington Report
JED - August 2013 - 23
JED - August 2013 - World Report
JED - August 2013 - 25
JED - August 2013 - 26
JED - August 2013 - 27
JED - August 2013 - The Spectrum Management Challenge: Creating Order From Chaos
JED - August 2013 - 29
JED - August 2013 - 30
JED - August 2013 - 31
JED - August 2013 - 32
JED - August 2013 - 33
JED - August 2013 - 34
JED - August 2013 - 35
JED - August 2013 - 36
JED - August 2013 - Technology Survey: ELINT Receivers
JED - August 2013 - 38
JED - August 2013 - 39
JED - August 2013 - 40
JED - August 2013 - 41
JED - August 2013 - 42
JED - August 2013 - 43
JED - August 2013 - 44
JED - August 2013 - 45
JED - August 2013 - 46
JED - August 2013 - 47
JED - August 2013 - EW 101
JED - August 2013 - 49
JED - August 2013 - 50
JED - August 2013 - AOC News
JED - August 2013 - 52
JED - August 2013 - Index of Advertisers
JED - August 2013 - JED Quick Look
JED - August 2013 - cover3
JED - August 2013 - cover4
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