[HamWAN PSDR] Switching to the 10MHz frequency plan

[Ryan Elliott Turner]

When persons have asked me about the process to switch from the 5 mhz to
the 10 mhz bandplan, they voiced the same concern here in Memphis. This
sounds like a great solution.

Instead of adopting the 10 MHz plan, I recommend that we update the 5 MHz
plan to share the same center frequencies as 10 MHz's plan. That way, the
configuration you've recommended is concisely documented and recommended to
other groups as well.


On Wed, Jun 25, 2014 at 1:27 PM, Bart Kus <me at bartk.us> wrote:

> Hi,
>
> Can I hear any objections to switching to the 10MHz frequency plan? We'd
> be retaining the 5MHz bandwidths for now to keep the power spectral density
> high, it would just be moving the center frequencies onto the 10MHz plan.
>
> This switch would let us keep those center frequencies through 2 upgrade
> cycles sometime in the future:
>
> 1) Expansion from 5MHz to 10MHz channels
> 2) Expansion from 10MHz SISO to 10MHz MIMO
>
> Presently our speeds are limited to 10Mbit/sector.  Upgrade phase 1 would
> bring us to 20Mbit/sector without any additional hardware costs.  Upgrade
> phase 2 would bring us to 40Mbit/sector with a hardware replacement of
> sector antennas and sector modems.  Hardware in phases 0 (present), 1 and 2
> can happily co-exist within the same region if we take this change.  If we
> stick on the 5MHz plan, any 10MHz hardware will interfere.
>
> The 20MHz plan collides with other radios present at some of our sites, so
> expansion to 20MHz will be difficult, if it ever happens at all.  The 10MHz
> plan should be good for the next few years until we find some better
> solutions should the need for speed be there.
>
> Portland is thinking of bringing up a compatible system so that users can
> roam up and down the coast without re-programming and they've asked for
> confirmation on the frequencies.  The other benefit of coordination onto
> the same channel plan is the border between the Washington and Oregon
> systems will not be full of interference.  Users could roam between the
> systems seamlessly.
>
> If there are any objections to switching to the 10MHz plan, please speak
> up.
>
> --Bart
>
>
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>



-- 

Ryan Turner
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