[hfsig] Performance of 24/192 soundcards? USB Soundcards

Robert McGwier rwmcgwier at comcast.net
Thu Sep 23 00:11:28 EDT 2004

EM == KALMAN when system and observation are linear.

-----Original Message-----
From: hfsig-bounces at lists.tapr.org
[mailto:hfsig-bounces at lists.tapr.org]On Behalf Of Robert McGwier
Sent: Thursday, September 23, 2004 2:13 AM
To: TAPR HF Modes SIG Mailing List
Subject: RE: [hfsig] Performance of 24/192 soundcards? USB Soundcards

The AEA DSP2232 demodulator worked as well as it did on UO-14
and other NO DC transmitters because it had a fractionally spaced
linear filter followed by a one tap per symbols DFE.  However,
be advised that this is the higher dimensional equivalent of
"dividing by 0".

There are better approaches

"Viterbi equalizer"


EM algorithm.


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