: Rud Merriam [EMAIL PROTECTED]
To: digitalradio@yahoogroups.com
Sent: Sunday, October 21, 2007 10:13 PM
Subject: RE: [digitalradio] Re: OFDM Proposal
Ed,
I am looking into the possibilities of OFDM. Right now I am stumbling over
how to modulate the sub channels using the IFFT. g Actually, I think
Could a
higher higher success rate without the fill requests be achieved with
some combination of better FEC, slower data rate, better spreading of
the data over frequency and/or time?
Try it. It's all there.
FEC, data spreading and data rate can be selected in DRM, read the doc.
Easypal
Look at KA9Q's web site, especially http://www.ka9q.net/code/fec/, for FEC
software.
73,
John
KD6OZH
- Original Message -
From: Rud Merriam
To: digitalradio@yahoogroups.com
Sent: Monday, October 22, 2007 05:13 UTC
Subject: RE: [digitalradio] Re: OFDM Proposal
Ed,
I
OFDM is used by a number of programs as Ed mentions, but isn't this also
the prime basis for many of our sound card modes? And Pactor 3?
Most of the items mentioned below have been done or are currently used
technology. One glaring exception is the lack of a narrow ARQ mode for
keyboard that
.
73,
John
KD6OZH
- Original Message -
From: Rud Merriam
To: digitalradio@yahoogroups.com
Sent: Monday, October 22, 2007 15:40 UTC
Subject: RE: [digitalradio] Re: OFDM Proposal
Thanks, John, for this reference and the other responses. I do keep an eye on
Phil's work
Rud,
I would really enjoy hearing some discussion on the use of OFDM on
HF. I work on an OFDM project and have an understanding of how it
works although I am not a system designer. I have also tried OFDM
with HamPal (digital SSTV) and WinDRM (digital voice) and it seems to
me that it offers
, 2007 11:55 PM
To: digitalradio@yahoogroups.com
Subject: [digitalradio] Re: OFDM Proposal
Rud,
I would really enjoy hearing some discussion on the use of OFDM on
HF. I work on an OFDM project and have an understanding of how it
works although I am not a system designer. I have also tried OFDM
