JED - September 2016 - 40

JTRS capability that will improve Link-16
datalink performance. A new 4-channel,
Concurrent Multi-Netting (CMN-4) capability allows the system to receive and
decode data in a single time slot from
four different nets, basically quadrupling the system's receive capability. In
addition, Concurrent Retention Receive,
or CDR-4, basically allows data from four
different users on the same net to be received in a single time slot.
For example, as described by Alves,
whereas currently with Link 16, an aircraft flying in formation with three
others would only be able to receive
data from the closest wingman, with
CDR-4, it will be able to receive data
from the four closest aircraft, providing additional throughput on the Link
16 network. It also allows for multiple
versions of CONOPS, because you can
receive on multiple nets at the same
time. These are major improvements
and advances on top of what is being
done with enhanced throughput. The
DLS joint venture is currently in its
fifth production lot of MIDS-JTRS, with
the system currently flying on the F-

18s including operational testing (OT)
of CDM-4/CDR-4).
Alves emphasizes that Link 16 provides a number of unique capabilities.
"Link 16 is the bridge between platform
generations, and it just pays to enhance
it as opposed to replacing it at the current time. If we can make it more robust,
and less detectible, smarter, for use in an
A2/AD environment, that will go a long
way to solving some of its shortcomings."
Beyond Link 16, Alves observes
that, overall, the next generation of
waveform(s) will need to meet increasingly demanding requirements for signal covertness, and will therefore need
to go beyond directionality and spreadspectrum (dynamic spectrum access)
techniques, addressing a host of other
requirements as well. "To operate in the
A2/AD environments you have to be able
to sense the environment that you're in,
sense what the threats are, and figure
out what will be your techniques for
countering those threats and ensuring
reliable communications. We're talking
about a `smart' waveform with highlyagile capabilities, but most importantly,

highly-autonomous, because a pilot in
an F-22 or F-35 has a lot of other things
to do, besides trying to be a network
manager. Waveforms going forward are
going to have to be able to figure out
what the adversaries are doing to try to
disrupt the communication, and they
are going to have to automatically adapt
to ensure that they keep communications up and running with no pilot intervention. It will be a game changer."
A number of research programs are
aimed at providing this next-generation
capability. For example, DARPA's Communications Under Extreme RF Spectrum
Conditions (CommEx) program is pursuing
technologies and techniques to ensure
communications in the presence of a wide
variety of adaptive jamming and interference sources. According to the program's
description, the technical objective is to
"develop innovative technologies that
make best use of all available domains for
adaptive interference suppression techniques appropriate for the constraints and
typical missions of various platforms."
Stating that (communication systems) "must improve jam-resistance

The Journal of Electronic Defense | September 2016

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JED - September 2016

Table of Contents for the Digital Edition of JED - September 2016

The View From Here
Conferences Calendar
Courses Calendar
From the President
The Monitor
World Report
Nothing to See (Or Hear) Here – Concealing Tactical Communications
Technology Survey: Manpack COMINT and DF Systems
The Heat is On
EW 101
AOC News
Index of Advertisers
JED Quick Look
JED - September 2016 - cover1
JED - September 2016 - cover2
JED - September 2016 - 3
JED - September 2016 - 4
JED - September 2016 - 5
JED - September 2016 - The View From Here
JED - September 2016 - 7
JED - September 2016 - insert1
JED - September 2016 - insert2
JED - September 2016 - Conferences Calendar
JED - September 2016 - 9
JED - September 2016 - Courses Calendar
JED - September 2016 - 11
JED - September 2016 - From the President
JED - September 2016 - 13
JED - September 2016 - 14
JED - September 2016 - The Monitor
JED - September 2016 - 16
JED - September 2016 - 17
JED - September 2016 - 18
JED - September 2016 - 19
JED - September 2016 - 20
JED - September 2016 - 21
JED - September 2016 - 22
JED - September 2016 - 23
JED - September 2016 - 24
JED - September 2016 - 25
JED - September 2016 - 26
JED - September 2016 - 27
JED - September 2016 - World Report
JED - September 2016 - 29
JED - September 2016 - 30
JED - September 2016 - 31
JED - September 2016 - 32
JED - September 2016 - 33
JED - September 2016 - Nothing to See (Or Hear) Here – Concealing Tactical Communications
JED - September 2016 - 35
JED - September 2016 - 36
JED - September 2016 - 37
JED - September 2016 - 38
JED - September 2016 - 39
JED - September 2016 - 40
JED - September 2016 - 41
JED - September 2016 - 42
JED - September 2016 - Technology Survey: Manpack COMINT and DF Systems
JED - September 2016 - 44
JED - September 2016 - 45
JED - September 2016 - 46
JED - September 2016 - 47
JED - September 2016 - The Heat is On
JED - September 2016 - 49
JED - September 2016 - 50
JED - September 2016 - 51
JED - September 2016 - EW 101
JED - September 2016 - 53
JED - September 2016 - AOC News
JED - September 2016 - 55
JED - September 2016 - 56
JED - September 2016 - Index of Advertisers
JED - September 2016 - JED Quick Look
JED - September 2016 - cover3
JED - September 2016 - cover4
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