Please download and test the new RX (ONLY) new image suppression
algorithm that pretty much completely eliminates this as a topic for
conversation in the DttSP, Flex, etc. world.
The mathematics has been in the DttSP repository at cgran for some
time. BUT, an algorithm does not exist in a vacuum. It needs
intelligent agents applying it. That has taken longer and was done with
Eric Wachsmann. I could not be happier with the result SO FAR.
There are steps to take that must be taken and this is the beginning of
the end of IQ as a topic, not the end itself.
branches/n4hy/iqtest/bin/Release gets the executable.
THERE IS NO CALIBRATION FOR THIS. It is automagic.
There may be some tuning that needs to be done to the parameters
governing its use but these are completely outside user control. We are
asking for your input.
WARNINGS: in this same branch, I have ruined the current wreckage of ANF
and NR while working to understand what is going on. I am re-doing the
block LMS algorithms and that will be the standard when done. You
CANNOT tune the TX image (yet) while this is running. That will come soon.
My explanations and other long winded blatherings are here:
http://n4hy.blogspot.com/2009/03/image-rejection-along-road-less.html
73's
Bob
N4HY
--
(Co)Author: DttSP, Quiktrak, PowerSDR, GnuRadio
Member: ARRL, AMSAT, AMSAT-DL, TAPR, Packrats,
NJQRP, QRP ARCI, QCWA, FRC.
"It is human nature to think wisely and act in
an absurd fashion.", Anatole France.
Twitter:rwmcgwier
Active: Facebook,Myspace,LinkedIn
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