True but I think you already know I did HMM using mixtures of Gaussians
in 1986 in possibly the best set of technical papers I ever wrote at
our common place of business. In a more refined version of it later,
applied to Markov chains and not to continuous time and space stochastic
Bob McGwier wrote:
True but I think you already know I did HMM using mixtures of Gaussians
in 1986 in possibly the best set of technical papers I ever wrote at
our common place of business.
Yeah, but I was thinking as well of ICA here.
Also, I'm pretty convinced there is an
At 08:18 AM 7/16/2007, Bob McGwier wrote:
True but I think you already know I did HMM using mixtures of Gaussians
in 1986 in possibly the best set of technical papers I ever wrote at
our common place of business.
I assume these weren't published in IEEE publications? (or at least
not in
MUSIC was invented where Frank and I worked for over 20 years
together in the middle 1960's. It can be a problem living behind locked
doors marked SHUT UP AS YOU LEAVE. But your point is well taken. One
or more of these existing algorithms can be made to work.
There is a large body of
If we were rendering in OpenGL, that would come for free and along for
the ride.
Yes, I am on my hobby horse. I do not like harming the performance of
the overall radio because we are afraid somebody might have a ten
generation old graphics card.
Please, somebody give me some more ammo.
Bob
At 08:25 PM 7/10/2007 -0400, you wrote:
Hi Ray,
Point well taken.
I shouldn't have described what I had in mind as splatter. Over
modulation would probably be more correct.
I DX foreign medium wave stations from Asia and the Pacific, and the #1
reason this type of DXing is a big challenge is
Subject: Re: [Flexradio] Manual notch filter?
SNIP
Hi,
Have you tried RF phasing to reduce local MF interference? For example you
would be receiving A3Z on your phased array or Beverage and you can be
receiving KOMO on a small loop antenna. Combine the signals and adjust the
loop so its phase
PM
To: Guy Atkins
Cc: flexradio@flex-radio.biz
Subject: Re: [Flexradio] Manual notch filter?
The notch filter should be able to work anywhere in the passband of the
audio ~180 KHz when running at 192 KHz sampling rate. Eric has the last
word on that.
-Tim
PROTECTED] [mailto:[EMAIL PROTECTED]
radio.biz] On Behalf Of Charles Greene
Sent: Wednesday, July 11, 2007 1:20 PM
To: Eric Wachsmann; FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] Manual notch filter?
All,
As I was [one] of the submitters of the manual notch filter, I have
given some
A couple of observations...
1. ) I think a simple notch filter that is outside of the filter pass
band, or its immediate skirts, is NOT going to effect anything that you
hear within the filter pass band. Any transmitter splatter or intermod
products that occurs before the ADC can not be
Here is the grand experiment we are going to try when we finally get to
calm down from the Flex5000 rush to finish. I have done enough
matlab/octave experimentation to expect it to work so long as we define
what it is we mean by work.
Suppose you are listening to weak signal A. Strong
Wow!
until this I had not thought there was any bennfit to out of passband
notch.
Jim - W4YXU
- Original Message -
From: Bob McGwier [EMAIL PROTECTED]
To: Ray Andrews [EMAIL PROTECTED]
Cc: flexradio@flex-radio.biz
Sent: Wednesday, July 11, 2007 1:41 PM
Subject: Re: [Flexradio] Manual
All,
As I was [one] of the submitters of the manual notch filter, I have
given some thought on how it can be implemented. Open discussion. I
like to click on a signal to do something with it, and I am dedicated
to the mouse. However, that is not going to work, as clicking on a
signal
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]; FlexRadio@flex-radio.biz
Subject: RE: [Flexradio] Manual notch filter?
Frank's approach of using a 3D style control sounds exciting and I'm
guessing lends itself to many other functions for which it is currently
difficult to provide a suitable display
I like this idea quite a bit. Mainly because I use this concept all
the
time in other applications (IDE, Paint Shop Pro, Word, etc).
I set my sights much lower. I'm just hoping some day in the distant
future we'll be able to re-size the panadapter display that we already
have.
Ah, to
At 10:03 AM 7/11/2007 -0700, you wrote:
Yes, I've done this before with the Radio Plus Quantum Phaser and my current
Wellbrook phased array. Some of my MW DX friends have done extensive work in
this area by modifying the MFJ phaser, or building Misek-based units such as
the phasers Dallas Lankford
On 7/11/07, Bob McGwier [EMAIL PROTECTED] wrote:
...It is strongly correlated and we should be able to
derive a filter that will predict a version of the signal that is IN
your passband. The property of the signal we will optimize on is to
reduce the energy of the interference to the best
At 11:41 AM 7/11/2007, Bob McGwier wrote:
Here is the grand experiment we are going to try when we finally get to
calm down from the Flex5000 rush to finish. I have done enough
matlab/octave experimentation to expect it to work so long as we define
what it is we mean by work.
Suppose you are
On 7/11/07, Jim Lux [EMAIL PROTECTED] wrote:
AKA an adaptive signal canceller. You adapt to find the strongest
signal (in time/frequency, as with radar STAP), subtract it from the
input. Then find the next strongest signal, subtract it, etc.
That's one way, but it's not what Bob was
Over the past 8 months, there has been a couple of enhancement requests to add
Manual Notch filter for CW. I always thought a manual notch could be useful on
PowerSDR, same as it is on other conventional steamboat rigs.
But this is one of the few good enhancement requests that has not been
is complete.
-Tim
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Tuesday, July 10, 2007 10:57 AM
To: flexradio@flex-radio.biz
Subject: [Flexradio] Manual notch filter?
Over the past 8 months, there has been a couple
I agree a manual notch filter would be useful and would be even better if
you could right click the offending signal when in panadapter display and
have a selection to apply notch filter. Also it should be available in other
modes as well as CW.
Just some wishful thinking :-)
Dave
WO2X
10:14 AM
Subject: Re: [Flexradio] Manual notch filter?
The manual notch filter is important.
All of the programming effort for the past few months has been towards
getting the FLEX-5000 working with PowerSDR and not on providing new
features. Enhancements and new features will get put back
-Original Message-
From: Jim McLester [mailto:[EMAIL PROTECTED]
Sent: Tuesday, July 10, 2007 1:14 PM
To: Tim Ellison; [EMAIL PROTECTED]; flexradio@flex-radio.biz
Subject: Re: [Flexradio] Manual notch filter?
Maybe implemented as a reverse of the present bandpass. Would really
help
I agree a manual notch filter would be useful and would be even better if
you could right click the offending signal when in panadapter display and
have a selection to apply notch filter. Also it should be available in
other
modes as well as CW.
Just some wishful thinking :-)
Dave
WO2X
Interestingly, in the digi world (PSK31) both HamScope and MixW have
notch filters built right into their waterfall's. You simply right click
on the offending signal and notch it out (up to about 40db I think).
de ken n9vv
[EMAIL PROTECTED] wrote:
I agree a manual notch filter would be useful
Tim,
Would a notch like this be able to work outside of the filter passband, but
within the panadapter window? It would be great to put a wide manual notch on
an adjacent channel signal to knock down splatter. However, this might work
better (or at all) with software phasing algorithms such as
: flexradio@flex-radio.biz
Subject: RE: [Flexradio] Manual notch filter?
Tim,
Would a notch like this be able to work outside of the filter passband,
but within the panadapter window? It would be great to put a wide manual
notch on an adjacent channel signal to knock down splatter. However
]
radio.biz] On Behalf Of Tim Ellison
Sent: Tuesday, July 10, 2007 5:29 PM
To: Guy Atkins
Cc: flexradio@flex-radio.biz
Subject: Re: [Flexradio] Manual notch filter?
The notch filter should be able to work anywhere in the passband of the
audio ~180 KHz when running at 192 KHz sampling rate. Eric
KE2SL wrote:
I agree a manual notch filter would be useful and would be even better if
you could right click the offending signal when in panadapter display and
have a selection to apply notch filter. Also it should be available in other
modes as well as CW.
Just some wishful thinking
Sounds like a plan to me.
Bob
Jim Lux wrote:
At 03:47 PM 7/10/2007, Eric Wachsmann wrote:
There are multiple issues at hand here. First, the technical aspect of how
to implement the filter. I'm sure there are latency considerations unless
we somehow combined this into our existing RX
Guy,
Of course, a notch filter could be coded to work anywhere in the range of
the panadapter display. However, don't hold your breath waiting for it to
do what you want. If the splatter is caused by an improperly adjusted
transmitter somewhere else on the band, then the splatter consists of
-0400
To: [EMAIL PROTECTED], [EMAIL PROTECTED], flexradio@flex-radio.biz
Subject: Re: [Flexradio] Manual notch filter?
Guy,
Of course, a notch filter could be coded to work anywhere in the range of
the panadapter display. However, don't hold your breath waiting for it to
do what you want
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