Recently PJ published an article about how closed standards are hobbling FEMA in its rescue and recovery efforts after Hurricane Katrina. I want to amplify that story by telling you a true tale about the conflict between open and closed communications systems as they effect FEMA operations, and how their people on the ground, the real responders, are affected by closed systems, and their awareness of the need for open alternatives.
Last May I was at the Dayton Hamvention -- that's the biggest annual
gathering for amateur radio operators in North America -- and one
afternoon a guy came up to me and said, "I'm from the US Government, and
I'm here to help you!"
He was already shaking my hand, so it was pretty awkward when I
immediately tried to back away from him. (Remember, this *is* a true
He laughed, and said, "No, really, I'm from FEMA..." and started
The reason I was in Dayton was, first, I'm a ham (AB2KT), and second, I
was there along with my friend Bob McGwier (N4HY), both of us as
volunteer authors of a body of program code that implements a Software
Defined Radio (SDR), to be found at http://dttsp.sourceforge.net. That
code is the software heart of a commercial radio which was being featured at the Hamvention.
There are other software radios -- what that means, I'll get to in a
second -- but the SDR-1000 is the first radio of its kind in a number of
ways, not the least of which is that *all* the software is GPL and
freely downloadable, much of which was written by unpaid volunteers like
us. It also happens to be a very fine two-way radio indeed, one of the
best currently available.
Now, what is Software Defined Radio? The concept is truly simple and
thus easily missed. When we say Radio, we're really talking about any
sort of wireless communications, one-way or two-way. The Software
Defined part simply means that most of the radio functions are carried
out not by circuits and components like resistors and transistors, but
instead by program code. This is not such a radical idea. Anybody who's
lived through the transition from vinyl records to compact discs has
first-hand experience with the same kind of replacement of hardware by
software. What it means to you is also simple. It's like substituting a
computer for a typewriter. You gain a vast range of new capability
because what it does, it does through program code, not physical
parts. A Software Defined Radio can easily be many different kinds of
radio, often several different types at once.
Our project is different from most other SDRs in that the programs are
meant to run on a desktop computer. Your computer, plus some additional
hardware in front of it. Most other SDRs embed their program code in
dedicated devices, usually DSP chips, and closed up operating
environments. This defeats much of the advantage of SDRs. (It also
suppresses many of the fears that conventional manufacturers harbor
about future SDRs.) Our project, however, runs on conventional OSes --
Linux, Windows, soon the BSDs and OSX -- so it's open to the four winds
of modification and extension.
Now, back to Dayton. What the FEMA guy was telling me was this.
They, along with the three other major operational agencies under the
Department of Homeland Security, rely on shortwave radios for two-way
communications in the field. In other words, they use HF -- HF standing
for "High Frequency," as opposed to, say, VHF, for "Very High Frequency"
-- for many of their tactical communications needs. That's pretty
common, since HF, done right, performs better than other bands in rough
or mountainous terrain. The military and many relief organizations
worldwide use it extensively.
The agencies' tactical communications rely on voice and digital data
both: they regularly pass critical time-sensitive email and documents
over these channels. It's important to realize that the *outer*
protocols for these systems are all MIL/FED standards, adhered to
worldwide for the most part. But everything else is proprietary.
All of the DHS operational agencies were worried. Owing to their
different legacies and procurement processes, they all had their own
distinct communications systems. The systems had all been developed and
manufactured by large government contractors, and they were all closed
in the tightest possible senses, both hardware and software. The systems
were incompatible with one another. The software they used for handling
email and documents was buggy and inadequate, and it ran on obsolete
versions of Windows. It was virtually impossible to coordinate the user
ends of the machines on a LAN. The vendors were completely unresponsive.
What's more, there were technological advances they'd desperately like
to exploit, but couldn't, because of vendor lock-in. For example, using
a technique called diversity reception, it would be possible to achieve
much higher data rates over their HF channels under adverse
conditions. But it was questionable whether their various systems could
be rigged to use the small selection of components available to them for
In short, the operational agencies under DHS understood their needs were
not being met by their existing systems, and there was no way to remedy
the situation since their systems were closed. There was also no
expectation of a fix from the vendors. They realized that what they
needed was open systems, now and in the future.
The only system on the horizon that might possibly fill the bill was
ours. Because most of the radio is in software, it could be customized
and made interoperable across agencies. Because most of the software
runs not on dedicated hardware like DSP chips, but on general-purpose
desktop computers running Linux, it would be easier to customize and to
integrate into more expansive networking facilities off the shelf. And
all of the software is GPL.
So, was there something that could be done? Not so much to help us, but
to help them?
Let me stress that there is a fair amount of excellent SDR software
around. Probably the most conspicuous is the gnuradio project, which is also
GPL, as the name would imply. Gnuradio is a first-rate piece of work, and its
leaders, Eric Blossom and Matt Ettus, are worthy of the highest respect both
for the quality of their work and their tireless devotion to promoting the
cause of software radio. However, gnuradio is not really designed to be
embodied as-is in a production system. Their goals and ours were considerably
different. From the start, we intended to have a compact, portable SDR core
that could comfortably be embedded in any number of different hardware
In the event, we agreed to pursue the matter further, and have been
doing so. Unfortunately events have a way of overtaking good
intentions. I do not know first-hand whether the problems we talked
about had a certifiably negative impact on rescue and relief efforts in
the Gulf Coast. I do know that the policy of seeking open systems, from
hardware down through the most elemental software, has the potential for
tremendous improvements in efficiency, when situations like New Orleans
The general issue of Software Defined Radio, its connection to open
systems and protocols, and its potential threat to conventional
telecommunications providers and manufacturers, is a large topic, one
which deserves more attention from the general community concerned with
FOSS development. But the larger picture is a story for another
time. For now, it's enough to note that the people on the ground, the
ones actually responsible for anticipating and preparing for
emergencies, want their systems open, merely to be able to do their
Frank Brickle describes himself as a longtime Groklaw camp follower. He's a composer with a day job. The day job involves work in the strange area where computers, radios, and cryptology intersect; for a sample of this, a product of close collaboration with mathematician Robert McGwier, see the DttSP project.
DttSP is an open source project started by Dr. Frank Brickle and Dr. Robert McGwier of the DTTS Microwave Society to provide code to be used in various DSP projects with an emphasis on Software Defined and Cognitive Radio. You can hear some recent musical work -- an opera for puppets, "The Creation of the World" based on the Townley Mystery Plays -- at the Weill Recital Hall at Carnegie Hall in New York City on December 22.