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Flex-6700 Fantasies – “Dreaming What Might Be!” Series – Diversity Reception Impact 5 - September - 2012

Posted by k9zw in Amateur Radio, Flex-6000, K9ZW, K9ZW Just Rambled.
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What will the Flex-6000 Flex-6700R/6700 Diversity Ability bring?

First, what is this “Diversity” thing?

To Quote:

diversity reception: Radio reception in which a resultant signal is obtained by combining or selecting signals, from two or more independent sources, that have been modulated with identical information-bearing signals, but which may vary in their fading characteristics at any given instant.

Note 1: Diversity reception is used to minimize the effects of fading. (188)

Note 2: The amount of received signal improvement when using diversity reception is directly dependent on the independence of the fading characteristics.  source:  Institute for Telecommunication Sciences http://www.its.bldrdoc.gov/fs-1037/dir-012/_1768.htm

Other background links:  http://en.wikipedia.org/wiki/Diversity_combining  and a Historic approach http://www.radioblvd.com/DiversityDD1.html

While diversity reception has been available before in amateur radio before, the processing has been mainly “by ear” or by visual screen presentation.  Where the Flex-6700R/6700 will exceed these older designs is by:

  • Internally Time-Stamped signals will allow intensive diversity reception processing for surveillance-grade diversity reception capability in an amateur radio device.
  • You will be able to manipulate nulls and steering of reception - you want to hear something off one side of my Antennas while cutting out the rest of what you would hear usually?  Manipulating diversity reception will deal with it.
  • Advanced automatic/semi-automatic software may make the diversity process transparent.  You only need to indicate what you want to hear and the system may auto-tune diversity reception to give you best copy.
  • Signals from several GPSDO equipped Flex-6700R/6700 units could be combined for wide-area diversity reception. Using the timing stamps several remote Slices would be processed together for a wide spaced diversity effect.

Later we will look at the possibilities of trading/buying/borrowing GPSDO Flex-6700R/6700 slices to do some pretty powerful stuff.

73

Steve

K9ZW

……………….

First post of this series Flex-6700 Fantasies – “Dreaming What Might Be!” Series

Planning in a few weeks to have another first hand look at the Flex-Radio Flex-6000 series radios at the W9DXCC Convention in Illinois.

Flex-Radio Flex-6000 Series

Flex-Radio Flex-6000 Series

……one can imagine, dream and scheme can’t one?

Reading the Flex-Radio literature, Insider newsletters and reflectors there is one massive amount of promise to this new radio an architecture!

I’d like to touch on a few items that have caught my eye, and what I imagine they might offer for the future of amateur radio.

Be absolutely certain I am speculating, I have no extra insight or sources (nor would I betray information given to me in confidence) and I am doing analysis based on what it out there.  I’m going to have fun speculating what might be.

Putting some guesses and construction to the pieces of information over the next few weeks, we’ll see if I guess right on anything announced at the W9DXCC or later when radios ship.

I’ll try to get a thought out every few days in the lead-up to the W9DXCC Convention and then an assessment in the week or so directly after the event.

I’ll link them to this “Flex-6700 Fantasies – “Dreaming What Might Be!” Series” starter and again in the wrap up.

73

Steve
K9ZW

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