Is it possible to receive the same frequency on the two receivers in my
5000a and invert one and then add it to the non-inverted and output
the result with a large degree of noise cancellation. I would think that
the received noise would be on a receiver using a less sensitive
antenna in order
radio...@frontiernet.net wrote:
Bob, how would this work with the SDR-1000 and Flex3000 considering they only
have one RX? Are you using the Multi-Rx capability in PowerSDR and them
applying the ESPRIT algorithms from the paper you referenced in this email??
73,
Dennis Petrich
Amateur Radio
USA
k0...@arrl.net
952-898-1082
- Original Message -
From: "Bob McGwier"
To: audio...@charter.net
Cc: "FLEX USERS"
Sent: Tuesday, May 5, 2009 7:39:01 PM GMT -06:00 US/Canada Central
Subject: Re: [Flexradio] Diversity Reception for Flex 5000 owners
Jim:
We can do t
2 els against one, or 3 x 2el pairs may be a better topology
73 W9OY
From: Phil Harman
To: Bob McGwier
Cc: Lee A Crocker ; Flexradio
Sent: Tuesday, May 5, 2009 9:02:44 PM
Subject: Re: [Flexradio] Diversity Reception for Flex 5000 owners
>
> Fra
W9OY
From: Phil Harman
To: Bob McGwier
Cc: Lee A Crocker ; Flexradio
Sent: Tuesday, May 5, 2009 9:02:44 PM
Subject: Re: [Flexradio] Diversity Reception for Flex 5000 owners
>
> Frank mentioned one person who had done some phasing experiments. I
> w
Perhaps what we need is adaptive diversity reception.
:)
Phil Harman wrote:
My results of using the system was inconclusive. What I found was that
strong local signals could be nulled completely. However, on DX stations
it was very difficult to get any form of null or enhancement. When you
>
> Frank mentioned one person who had done some phasing experiments. I
> would also like to mention Alex Shovkoplyas, VE3NEA who has done a
> really neat version. I intend to steal his user interface idea
> completely. It makes both mathematical and user sense.
>
> Bob
>
I had the good fortun
You idea is a good one. Period. That is all you should take away from
my remarks. I had not even begun to think of doing coherent processing
with the software receivers except to suck off interfering sidebands
from other signals in our passband. Thank you. John lovingly calls it
the Bob Suc
Thanks for the reply, Bob.
I have no axe to grind with regard to any particular algorithm, but I
did want to make sure what I thought would be the simplest/most common
case would be covered; IE one antenna available and the desire for the
most effective noise reduction/cancellation. Having don
Jim:
We can do this right now with a software receiver. We need to make the
oscillators coherent in the same way we have done (in software). So
this will be usable by SDR-1000 and Flex3000 owners. Good idea.
I do not agree that the algorithm you suggest is the correct one but it
will be t
I would upgrade to a Flex5000 just to get Diversity
Keep up the great work guys.
73, Dennis, k0eoo
- Original Message -
From: "Bob McGwier"
To: "Lee A Crocker"
Cc: "Flexradio"
Sent: Tuesday, May 05, 2009 6:58 PM
Subject: Re: [Flexradio] Div
Wow is right. It is hard to understand just how impressive 40F really
is. 40G sounds the most impressive but to the trained ear and tools, 40
F is amazing. The Flex 5000 is utterly coherent through the
oscillators. It is two different DDS's that are synchronized by a built
in system which G
Lee A Crocker wrote:
I made a few more clips. The effect can be spectactular or very subtle. In
40-E I found on static the source is sort of from a quadrant and so the
notching is very broad. None the less I could get about 3dB of noise
reduction. In 40-F the SWBC is dramatic. The statio
I made a few more clips. The effect can be spectactular or very subtle. In
40-E I found on static the source is sort of from a quadrant and so the
notching is very broad. None the less I could get about 3dB of noise
reduction. In 40-F the SWBC is dramatic. The station was very weak. If th
Not being familiar with the architecture or sources, would there be any
value in developing a 2-input, LMS-style noise reduction scheme using
the same antenna for both receivers and a small frequency offset? (RX2
would be tuned to an unoccupied "noise" frequency as close as possible
to the "act
Frank Brickle wrote:
FWIW there is an article by Victor K1LT for QEX about work with this same
technique, using multiple SoftRocks and Linux DttSP. Victor has been
developing his own software for phased combining of multiple antenna inputs
for a couple of years now, with considerable success, as
FWIW there is an article by Victor K1LT for QEX about work with this same
technique, using multiple SoftRocks and Linux DttSP. Victor has been
developing his own software for phased combining of multiple antenna inputs
for a couple of years now, with considerable success, as related in the
article.
Eric and I have begun adding the diversity reception capability to the
Flex 5000. It will work for those 5000's which have the RX2 installed.
In my diversity branch, one can find the enabled code. It is VERY
rough but as you can tell from Lee's blog:
http://w9oy-sdr.blogspot.com/
the softw
Lee,
You obviously need two antennas and two sets of
analog components. Why don't you try the AmQRP
Soft Rock 40 as a second analog device? You may
be able to run two copies of Power SDR Console
from different directories. You should also be
able to run SO2R which may be of interest to
s
Robert McGwier
Sent: Sunday, January 08, 2006 8:34 PM
To: Lee A Crocker
Cc: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] diversity reception
Lee:
The only diversity that an SDR-1000 is able to provide is frequency and
time diversity. You can send whatever elements you want to see at
mult
ge-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Robert McGwier
Sent: Sunday, January 08, 2006 8:34 PM
To: Lee A Crocker
Cc: FlexRadio@flex-radio.biz
Subject: Re: [Flexradio] diversity reception
Lee:
The only diversity that an SDR-1000 is able to provide is frequency and
tim
Lee:
The only diversity that an SDR-1000 is able to provide is frequency and
time diversity. You can send whatever elements you want to see at
multiple frequencies and/or at multiple times using the SDR-1000. You
have 40+ KHz of bandwidth in/out of the SDR-1000 so we could send the
same signa
At 02:26 PM 1/8/2006, Lee A Crocker wrote:
>
I'm not sure this is a "nitch" market. There are
thousands of hams involved with weak signal work and
DXing who have multiple antennas that could implament
diversity reception, so this may actually be an
unexplored market, and this is a very good RX
>
I'm not sure this is a "nitch" market. There are
thousands of hams involved with weak signal work and
DXing who have multiple antennas that could implament
diversity reception, so this may actually be an
unexplored market, and this is a very good RX to
introduce to exploit it.
The problem has
Apart from dynamic range issues, a USRP is probably a better vehicle for
this kind of work.
73
Frank
AB2KT
Jim Lux wrote:
At 11:15 AM 1/8/2006, Lee A Crocker wrote:
I have an interest in diversity reception. Therefore
one would need essentially 2 antennas, 2 revievers
locked to the same fr
At 11:35 AM 1/8/2006, Frank Brickle wrote:
The software could easily handle diversity reception, but you'd need to
provide a separate, independent RF path and A/D conversion input pair
for each channel. In short, another whole SDR1K hardware box.
Actually, you don't need a WHOLE SDR1K.. you ju
At 11:15 AM 1/8/2006, Lee A Crocker wrote:
I have an interest in diversity reception. Therefore
one would need essentially 2 antennas, 2 revievers
locked to the same freq, and a way to mix the audio
stream from each receiver. I would like this in the
context of being able to transmit also on on
The software could easily handle diversity reception, but you'd need to
provide a separate, independent RF path and A/D conversion input pair
for each channel. In short, another whole SDR1K hardware box.
73
Frank
AB2KT
Lee A Crocker wrote:
I have an interest in diversity reception. Therefor
I have an interest in diversity reception. Therefore
one would need essentially 2 antennas, 2 revievers
locked to the same freq, and a way to mix the audio
stream from each receiver. I would like this in the
context of being able to transmit also on one freq
which may be offset from the RX freq.
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