Fwd: Update on Amateur Data

Bill V WA7NWP wa7nwp at gmail.com
Fri Feb 19 14:26:55 PST 2010


An update from John.  He was the one working on a 6 meter OFDM system
as part of the HSMM project.  It's nice to see the work continues and
we may eventually get something capable of wider data than the ID-1.


73
Bill - WA7NWP


---------- Forwarded message ----------
From: John  <kd6ozh
Date: Fri, Feb 19, 2010 at 1:52 PM
Subject: Re: Amateur Data



The lastest version of the OFDM modem moves the microprcessor into the
FPGA and is switchable between 9600 bps and 1.2 Mbps (using 6 and 800
kHz bandwidths). The winter 2009 TAPR newsletter has a description of
the soft processor and this is augmented by dedicated logic that does
most of the signal processing for analog voice and OFDM. It works
nicely between 2 boards on the bench with a multipath simulator but
I'm still experimenting with the outer error-correcting code to make
it more suitable for HF at 9600 bps. I should be ready to do more
on-air testing in a few weeks.

73,

John
KD6OZH


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