Steve,
Is there adaptive equalization used in the PCALE or
MARSALE implementation of 188-110A or B?
73,
Mark N5RFX
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org
Other areas of interest:
The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/
DigiPol:
Mark Miller wrote:
Steve,
Is there adaptive equalization used in the PCALE or
MARSALE implementation of 188-110A or B?
73,
Mark N5RFX
We do not have the source code but from the performance anecdotal
evidence given us by Bonnie and others (transmitting the images) it
would not
This is needed,
absolutely mandatory, to mitigate the fading multipath HF channel.
Bob,
Thanks. I have not had a opportunity to send images with 188-110, but
after reading the specification, I thought adaptive equalization would be
necessary. I look forward to sending images. I have
188-141 does not merit adaptive equalization in my opinion. At 125
tones per second, one of 8 tones is turned on. Each tone sends 3 bits
as a result. The data is encoded with a Golay code. This is about
twice as fast as is optimal for most HF channels given this kind of
transmission
After reading the spec at
http://tracebase.nmsu.edu/hf/standards/MIL/188-110B.pdf I see from a high
level how the fixed frequency modem works. Table XIX in the document gives
a great summary. I have taken a snapshot of that table an posted it at
