GMT -06:00 US/Canada Central
Subject: Re: [Flexradio] Diversity Reception for Flex 5000 owners
My impression is you need more than a single pair of antenna choices.
I spent a lot of time trying to seperate WWVH and WWVB from FL using 2
verticals that were endfire to the E/W. I think something
USA
k0...@arrl.net
952-898-1082
- Original Message -
From: Bob McGwier rwmcgw...@gmail.com
To: audio...@charter.net
Cc: FLEX USERS flexradio@flex-radio.biz
Sent: Tuesday, May 5, 2009 7:39:01 PM GMT -06:00 US/Canada Central
Subject: Re: [Flexradio] Diversity Reception for Flex 5000 owners
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
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
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
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
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
Subject: Re: [Flexradio] Diversity Reception for Flex 5000 owners
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
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
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
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 fortune to do
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
W9OY
From: Phil Harman p...@pharman.org
To: Bob McGwier rwmcgw...@gmail.com
Cc: Lee A Crocker lee_croc...@yahoo.com; Flexradio flexradio@flex-radio.biz
Sent: Tuesday, May 5, 2009 9:02:44 PM
Subject: Re: [Flexradio] Diversity Reception for Flex 5000 owners
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
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
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