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<HTML><HEAD><TITLE>RE: [hfsig] What can you do with an OFDM signal in a 3.5 KHz bandpass?</TITLE>
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<DIV><SPAN class=697385819-20082005><FONT face=Arial color=#0000ff size=2>The
POTS will give you 56 kbit/sec in the same bandwidth.</FONT></SPAN></DIV>
<DIV><SPAN class=697385819-20082005><FONT face=Arial color=#0000ff size=2>Using
OFDM some channels will not be available, fec is not enough, so one has to
spread the info over all the channels.</FONT></SPAN></DIV>
<DIV><SPAN class=697385819-20082005><FONT face=Arial color=#0000ff size=2>Reread
the fs-1052, why do you think are so many different throughput speeds
defined?</FONT></SPAN></DIV>
<DIV><SPAN class=697385819-20082005><FONT face=Arial color=#0000ff size=2>10
kbits in 3 kHz? Forget it, may be sometimes, but not always.</FONT></SPAN></DIV>
<DIV><SPAN class=697385819-20082005><FONT face=Arial color=#0000ff size=2>HF is
a naughty channel,</FONT></SPAN></DIV>
<DIV><SPAN class=697385819-20082005><FONT face=Arial color=#0000ff
size=2>Regards</FONT></SPAN></DIV>
<DIV><SPAN class=697385819-20082005><FONT face=Arial color=#0000ff
size=2>Henk</FONT></SPAN></DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Oorspronkelijk bericht-----<BR><B>Van:</B>
hfsig-bounces@lists.tapr.org [mailto:hfsig-bounces@lists.tapr.org]<B>Namens
</B>DuBose Walt Civ AETC CONS/LGCA<BR><B>Verzonden:</B> vrijdag 19 augustus
2005 22:25<BR><B>Aan:</B> 'TAPR HF Modes SIG Mailing
List'<BR><B>Onderwerp:</B> RE: [hfsig] What can you do with an OFDM signal in
a 3.5 KHz band pass?<BR><BR></FONT></DIV>
<P><FONT size=2>When talking to EOC, disaster relief and military contingency
personnel about HF data modes, they no longer ask how many words per minute is
it, now they are asking how many pages per minute is your
capability.</FONT></P>
<P><FONT size=2>We can no longer think in WPM capability; but rather, pages
per minute (ppm).</FONT> </P>
<P><FONT size=2>73,</FONT> </P>
<P><FONT size=2>Walt/K5YFW</FONT> </P>
<P><FONT size=2>-----Original Message-----</FONT> <BR><FONT size=2>From:
hfsig-bounces@lists.tapr.org [<A
href="mailto:hfsig-bounces@lists.tapr.org">mailto:hfsig-bounces@lists.tapr.org</A>]On
Behalf Of DuBose Walt Civ AETC CONS/LGCA</FONT> <BR><FONT size=2>Sent: Friday,
August 19, 2005 2:41 PM</FONT> <BR><FONT size=2>To:
'hfsig@lists.tapr.org'</FONT> <BR><FONT size=2>Subject: [hfsig] What can you
do with an OFDM signal in a 3.5 KHz bandpass?</FONT> </P><BR>
<P><FONT size=2>What can you do (what RAW throughput) can you get in a 3.5 Khz
bandwidth using an OFDM mode? </FONT><BR><FONT size=2>Here's what I found
using some figures based on the FS-1052, Appendix A modem. </FONT><BR><FONT
size=2>Your User Throughput will be determined on how much RAW througput you
use for FEC. </FONT><BR><FONT size=2>Walt/K5YFW </FONT><BR><FONT size=2>
</FONT><BR><FONT size=2> </FONT> </P></BLOCKQUOTE></BODY></HTML>