5.7/5.8 GHz 802.11n dual polarity MIMO through office building glass, 1.5 km distance

Wayne E. Bouchard web at typo.org
Wed Dec 29 00:07:44 CST 2010


Codes are usually defined in one of two ways... Either "cannot be
above the building parapet" or "cannot be visible from the street
below" (which allows you to position a stant at the center of the roof
so you can clear the parapet) but when talking to building management,
it can very easily be, "can't put anything on the roof"

So to be certain we're not missing an opportunity, do you know that
you don't actually have the second of those definitions as an option?
In my area, neighboring jurisdictions adopt either the first or the
second with building management usually adopting the first and making
my life difficult. (IE, can do it in one place but not on the
companion building.)

On Tue, Dec 28, 2010 at 09:51:48PM -0800, Joel Jaeggli wrote:
> On 12/28/10 8:48 PM, Anonymous List User wrote:
> > For architectural and building management reasons we cannot mount our
> > antennas in a rooftop or outdoor location at either end.  The distance
> > between two buildings is 1.5 km, and the fresnel zone is clear.  Antennas
> > need to be located indoors at both ends and will be placed on small speaker
> > stand tripod pointing at windows.  This has been done successfully before
> > with 2.4 GHz 802.11g equipment and a link from an office in the Westin to a
> > nearby apartment building, but I am unsure of what effect glass will have on
> > 5 GHz.  Has anyone tried this?
> 
> glazed windows (which is tin in general) are a problem... when most of
> your radiation as being thrown right back at you that is a challange.
> 
> > The goal of this link is to achieve a 10 Mbps+ full duple bridge to a
> > building which is only serviced by ADSL2+ Telus service in a Western
> > Canadian city.  Telus' upstream speed offering do not exceed 1 Mbps.
> > 
> > Equipment.  These have been used successfully for MCS13/MCS14 50 Mbps+
> > bridges at 11 km distance between towers.
> > 
> > http://ubnt.com/nanobridge
> > 
> > http://www.ubnt.com/downloads/nb5_datasheet.pdf
> > 
> 

---
Wayne Bouchard
web at typo.org
Network Dude
http://www.typo.org/~web/




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