JED - October 2015 - 31

EW Simulation and Testing:

By John Hansen

T

esting EW systems has
always been an engineering challenge of formidable
proportions, and it has
increased exponentially in
lockstep with EW systems'
technological prowess, the performance
expected of them, and the threats they
face from AESA radars. The final hurdle
for every new EW system occurs at the
test range, where it is subjected to the
conditions it will experience in service.
Before the EW system hits the test range,
however, it is comprehensively evaluated at installed system test facilities
the feature complex threat environment
simulators. However, even before the EW
system reaches these phases of the test
process, it will have been subjected to
many, many tests at system integration
labs and hardware in the loop test facilities. These phases of testing are crucial,
as they find problems and allow developers to fix them before moving onto
more expensive test phases described
above. The goal is to test often and test
early, especially in the labs. Fortunately
software simulation tools and COTS measurement systems are becoming more
sophisticated and have become essential
tools in today's highly cost-sensitive EW
development environment.

THE EW TESTING REGIME
As there are precious few test ranges,
most are in use almost continuously and
"booking" test time is a lot like getting
an appointment at a top medical specialist. So it's not surprising that DOD,
prime contractors, and test equipment
manufacturers face constant pressure
to move as much of the simulation and
testing as possible from the test range
back to the lab. This drives a need for
more sophisticated test capability in the
labs. However, much progress has been

It's not surprising that
DOD, prime contractors,
and test equipment
manufacturers face
constant pressure to
move as much of the
simulation and testing
as possible from the
test range back to
the lab.

made in these COTS-based simulation
and test platforms so that today an EW
system can be much more thoroughly
evaluated well before it faces its final
validation challenges.
The overarching goal of this concept
is to conduct the majority of simulation,
testing and analysis early in the design
process using simulation software and
commercial test equipment. This must include the amassing and subjecting the EW
system to the greatest amount of signal
content over the widest bandwidth, including constantly changing waveforms,
interference, known threats and other dynamic factors in the signal environment.
The capabilities of such test systems
are comprehensive. They must be able to
correctly simulate temporal radar pulse
characteristics, interference and propagation anomalies that include
*	 	R ise	and	fall	times
*	 	P ulse	 width,	 pulse	 repetition	 frequency and patterns
*	 	Modulation	of	each	pulse
*	 	Frequency	and	spectral	characteristics
*	 	Signal	amplitude
*	 	R adar	antenna	patterns
*	 	A ntenna	scanning	patterns
These test systems may also have to
create and dynamically change emitter types, simulate mode changes and

The Journal of Electronic Defense | October 2015

Keeping Up
With the Threat

31



JED - October 2015

Table of Contents for the Digital Edition of JED - October 2015

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
World Report
Going Small: Jamming the Mini-Drones
EW Simulation and Testing: Keeping Up With the Threat
Technology Survey: EW and SIGINT Antennas
EW 101
Index of Advertisers
JED Quick Look
JED - October 2015 - cover1
JED - October 2015 - cover2
JED - October 2015 - 3
JED - October 2015 - 4
JED - October 2015 - 5
JED - October 2015 - The View From Here
JED - October 2015 - 7
JED - October 2015 - Conferences Calendar
JED - October 2015 - 9
JED - October 2015 - Courses Calendar
JED - October 2015 - 11
JED - October 2015 - From the President
JED - October 2015 - 13
JED - October 2015 - 14
JED - October 2015 - The Monitor
JED - October 2015 - 16
JED - October 2015 - 17
JED - October 2015 - 18
JED - October 2015 - 19
JED - October 2015 - 20
JED - October 2015 - 21
JED - October 2015 - World Report
JED - October 2015 - 23
JED - October 2015 - 24
JED - October 2015 - 25
JED - October 2015 - Going Small: Jamming the Mini-Drones
JED - October 2015 - 27
JED - October 2015 - 28
JED - October 2015 - 29
JED - October 2015 - 30
JED - October 2015 - EW Simulation and Testing: Keeping Up With the Threat
JED - October 2015 - 32
JED - October 2015 - 33
JED - October 2015 - 34
JED - October 2015 - Technology Survey: EW and SIGINT Antennas
JED - October 2015 - 36
JED - October 2015 - 37
JED - October 2015 - 38
JED - October 2015 - 39
JED - October 2015 - 40
JED - October 2015 - 41
JED - October 2015 - 42
JED - October 2015 - 43
JED - October 2015 - EW 101
JED - October 2015 - 45
JED - October 2015 - 46
JED - October 2015 - 47
JED - October 2015 - 48
JED - October 2015 - Index of Advertisers
JED - October 2015 - JED Quick Look
JED - October 2015 - cover3
JED - October 2015 - cover4
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