remote operation in the new world of software radio · a great cookbook example: ... ( “ ”this...
TRANSCRIPT
SDR in the Clouds
Remote Operation in the New World of Software Radio
Frank Brickle, AB2KT
Dayton SDR Forum 2008
© 2008 by Frank Brickle Creative Commons License ND/NC/ATTR
Remote Operation (1)
You see, wire telegraph is a kind of a very, very long cat. You pull his tail in New York and his
head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, they receive
them there. The only difference is that there is no cat.
-- Albert Einstein
Remote operation likewise.With SDR, there is also no radio.
Remote Operation (1a)
“This is the KFS transmitter selector...the transmitter
was located at Half Moon Bay, CA, about 20 miles south of San Francisco.”
courtesy of http://www.qsl.net/w2vtm/rca_history_kph.html
Remote Operation (1b)
A great cookbook example:
Remote Control Your HF Rig via the Internet
Alfred T. Yerger II, WA2EHI
http://www.arrl.org/news/features/2008/03/28/10033
uses HRD, CAT control, Skypeon 2 computers running WindowsWindows
EPU but...limited bw, access, etc.* ( )
Nice, but...
Everything needs to be programmed by the author...
“As a oneman development project I just can't do everything!”
Other issues
...We Can Do Better
Ubiquitous networking
Open protocols Universal plumbing Equipment designed
for the task, including software
The Goal
Make remote operation ascommon, easy, practical, and useful as
listening to an iPod ®,making a call with a cellphone,
or surfing the Web at a Starbucks ®.
This is the clouds part,( “ ”or one of them anyway.)
What Are We Really Talking About?
A Virtual Radio – not just what it does, but how it interacts with us.
This is something game designers and programmers do all the time.
Software Radio
Conversion
Computation
Channels
User PortsBits
RF
“Old” SDR Architecture
“New” VR-SDR
The 4.5 Horsemen of the
Digital Apocalypse
Is it:● common now?● possible now?● possible soon?● possible, period?
...or, even better...● easy?
● practical?● useful?
The Challenges
1. Bandwidth2. Latency3. Robustness4. Cost
Challenge 1: Bandwidth
...this is a BIG topic!
Signal/Data Inband control
OOB control Metadata
Other traffic
Bandwidth: Signal/Data
Audio● Narrowband● Broadband
Graphics● Pandapter● Waterfall
Challenge 2: Latency
Challenge 3: Robustness
Challenge 4: Cost
A Contentious Ground Rule
Free* Open Source/or
Open Standard**
* Free as in speech, not beer** per Bruce Perens, K6BP
Software Radio
Conversion
Computation
Channels
User PortsBits
RF
Computation
Channels
User Ports
Bits
Conversion
RF
In the Amazon
Is EC2 the answer?
What Are We Really Talking About, Again?
A Virtual Radio – not just what it does, but how it interacts with us.
This is something the game designers and programmers do all
the time.We need to do it too.
Resources
http://dttsp.org
http://hpsdr.org
http://aigamedev.org
http://gnuradio.org/trac/wiki
http://en.wikipedia.org/wiki/Interplanetary_Internet
Signal Processing Techniques for Software Radios http://www.lulu.com/content/1620824
Programming Erlang: Software for a Concurrent World ISBN: 9781934356005