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HamRadioNow: High Speed, Low Power Data on UHF; Dynamic Modulation... from
the DCC

Posted: 19 Dec 2012 07:37 AM PST
http://forums.qrz.com/showthread.php...C&goto=newpost




HAMRADIONOW.tv



Episodes 41 and 42 from the ARRL/TAPR DCC



Episode 41: Experimenting with High Speed

Wireless Networking in the 420 MHz Band

David Bern W2LNX looks into long distance, high-bandwidth digital signals
using

low-power, off-the-shelf data radios in the 420 MHz band. He uses digital
television to generate

the wideband signals, and a little lift from some Virginia mountains to
extend his line-of-sight.

How far do you think these few-hundred milliwatt radios worked to carry
several megabits per second?

HamRadioNow



Episode 42: On-line Alternation of

Modulation Techniques using a Dynamic Switch

Shashank Gaur and his masters degree classmates from Ecole Centrale
d'Electronique

in Paris are experimenting with ways to dynamically change digital
modulation modes to adapt

to changing conditions for maximum throughput, using USRP radios.

HamRadioNow



The ARRL/TAPR DCCis an annual, three-day conference featuring presentations
on a variety of

technical and operational aspects of Amateur Radio. This year's DCC, held
in Atlanta last

September, had 16 of the 45-minute main presentations, the usual Saturday
banquet talk,

and a four-hour "deep dive" into GNU radio on Sunday. HamRadioNow
videotaped all the talks,

and we are now releasing them on-line. We'll continue with one or two a
week until

you have them all.



Watch these episodes at our web site, www.HamRadioNow.tv.



to support these programs, visit

HAMRADIONOW.tv

and 'click the pig'