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From: Kurtis Heimerl <kheimerl@cs...> - 2011-04-28 07:01:25
We here in the TIER group have been working on an OpenBTS project for
a while. We're reaching the phase of "scaling up" the small scale
room-sized BTS to a larger, longer distance deployment. We're now
testing the range of our new system and it's surprisingly low, order
100M. I've tested our equipment fairly well, so I feel the range
should be much longer.
I'm curious what settings should be enabled in OpenBTS to enable
maximum range. The power related ones i've set are:
Is there anything else obvious I might be missing?
I feel like I should up GSM.RxGain as well.
> We're now
> testing the range of our new system and it's surprisingly low, order
> 100M. I've tested our equipment fairly well, so I feel the range
> should be much longer.
Well, what's your setup exactly ?
(USRP / boards / antenna / whole setup description).
For a classic setup with just two VERT900 antenna, it sounds about right.
> GSM.PowerManager.MaxAttenDB 0
> GSM.PowerManager.MinAttenDB 0
That just disable power control completely, you can set the MinAttenDB
to 0 and leave the max higher up to allow the control loop to do its
job, it will not interfere.
> I feel like I should up GSM.RxGain as well.
Depends if you're RX or TX limited ...