JED - October 2015 - 32

perform other feats in keeping with the
already extensive and rapidly improving
capabilities of advanced threat systems,
such as the AESA radar.
Fortunately for engineers involved
in this endeavor, the days when this
required huge banks of analog, digital, and RF and microwave test equipment, much of it custom-designed and
unique to a particular program, are
(slowly) changing. The simple reason is
that cost constraints have demanded a
new approach, driven in large measure
by DOD's shrinking budget and its goal
of advancing the state of the art for EW
as fast as possible after years of playing
second-fiddle to most everything else in
the DOD R&D and procurement budgets.
Time (or the lack of it) is indeed of the
essence. Thus, there are intensive development efforts to streamline testing,
which is one of the more time-consuming (and expensive) elements of system
development. To realize what can be

...cost constraints
have demanded a new
approach, driven in
large measure by DOD's
shrinking budget and its
goal of advancing the
state of the art for EW
as fast as possible...
THE COTS-BASED APPROACH
The key attributes of a closed-loop,
lab-based EW simulation and evaluation
system (Figure 1) include:
*	 	A	wide-ranging	array	of	waveforms,	
software to create new ones, and one
or more vector signal generators to
play back waveforms at any frequency

The Journal of Electronic Defense | October 2015

32

Deep Memory
Reservoir
User's
Automated
Input

FPGA/DSP/GPU
Processor

*	 A
	 	system	approach	that	allows	waveforms to be digitized, recorded, stored,
and played back with the least possible
amount of latency.
*	 	Software	tools	that	can	rapidly	sort	
through hours of waveform files and
identify those of interest, modify
them, create files containing only
specific waveforms and ultimately
create a simulated but nevertheless
very "real" signal environment.
Capturing and cataloging threats is
a monstrous task that requires years
of SIGINT collection, exploitation and
analysis from which a database can be
constructed that includes extremely detailed information about specific radar
systems, friendly, unfriendly, and possibly unfriendly. Fortunately, thanks to
the DOD's long-term data-collection efforts, such a database already exists and
is constantly being updated.
Unfortunately, the threat "landscape" is in a continual state of change

AWG based EW Threat Simulation
& Wideband Spectrum Simulation
(I/Q baseband signals)
╬╝Wave Source
Local Oscillator
I/Q

Arbitrary Waveform
Generator

Upconverter

SUT

UXG Signal Generator based EW Threat Simulation
(PDW or I/Q baseband signals)
PDW List
User's
Threat
Database

Analog or Vector
Signal Generator

PDW
Parsing

SUT

PDW
Stream
PDW = Pulse Descriptor Words
SUT = System Under Test

Figure 1: The elements in a comprehensive COTS-based EW simulation and evaluation system.

achieved by increasing the laboratory
portion of the test process, it's necessary to understand what is required.

from HF through 18 GHz (and sometimes higher), with modulation bandwidths exceeding 1 GHz.

as the world's technologically advanced
militaries create new threat radars and
radar waveforms, and as some advanced



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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