And those are available already. the CATV industry has had them, in
75ohm, for a long time.
One thing I really hope for this gear is that the vendors decide to
make 75ohm gear. There is a HUGE amount of stuff already out there
that we can use if they do.
Jack Unger wrote:
That's a very good idea on the transmit side. Remember that our AP
receivers will also need a VERY sharp filter ($$$) to keep the adjacent
channel TV signal from overloading it and reducing the reception range
to ****.
jack
Chuck McCown - 3 wrote:
For adjacent channel use, we don't have to use a 6 MHz channel. We could
use 5 or 4 or whatever it takes to make it work.
----- Original Message -----
From: "Jack Unger" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Wednesday, November 19, 2008 1:32 PM
Subject: Re: [WISPA] TV Whitespaces
Directional antennas and other interference-avoidance techniques will
help but for mass-market use (which is how the vendors visualize the
TVWS) I suspect that it's going to be a long time before 1st adjacent
channel use will be practical. Still, gaining access to most of the
non-1st adjacent channels white space is still a big "win" for the WISP
industry.
Chuck McCown wrote:
Hopefully forward error correction and directional antennas will make it
possible.
----- Original Message -----
From: "Jack Unger" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Wednesday, November 19, 2008 1:19 PM
Subject: Re: [WISPA] TV Whitespaces
Anything's possible but look at the shape of a DTV waveform and compare
it to the shape of an OFDM broadband wireless signal. Now look at the
space between those two waveforms if they are on adjacent channels. It's
kind of like putting two bricks side by side with no space in between.
Who is going to interfere with who the most? Looks like the DTV signals
will interfere with our AP receivers AND our CPE transmitters will
interfere with nearby television receivers. Of course, I could be
wrong.... What's your take on it?
Chuck McCown wrote:
Perhaps once TVWS gets used and it proves a success, then they will
open
up
adjacent channels.
Once they do that there will be holes everywhere.
----- Original Message -----
From: "Jack Unger" <[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Wednesday, November 19, 2008 12:58 PM
Subject: Re: [WISPA] TV Whitespaces
Joe,
The White Spaces are the unused television channels. In most major
metro
areas, many of the channels are in use by television broadcasters and
other licensed users. Outside of major metro areas, there will be
unused
channels available that you can use. In general, the more rural you
are,
the more channels will be available.
jack
Joe Laura wrote:
Am I hearing correctly that this new space can only be utilized in
rural
areas? Not for Citys like New Orleans? TIA
Joe Laura
Superior Alarm/Wireless
New Orleans,La.
www.superior1.com
----- Original Message -----
From: Blair Davis
To: WISPA General List
Sent: Monday, November 17, 2008 5:47 PM
Subject: Re: [WISPA] TV Whitespaces
Ubquity? Some kind of mini-pci card?
Charles Wyble wrote:
Mike Hammett wrote:
Now that TV whitespaces have been approved for our use, let's hear
from
the vendors. When, how much, and what will you do with it?
Indeed!
Who would the likely vendors in this space be?
Should we put an RFP together and send it around? I sure want
answers
to your questions as well.
Ladies and gents: I haven't read all of the published information
yet,
but this is the second greatest battle we have come across (second
only
to having unlicensed available in the first place) and we have won!
Congrats. It appears the portable devices are held to 100 mw of
power,
while we have 4 watts (which is pretty much what we have everywhere
else). Four watts at these frequencies will carry!
Yep!
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Serving the Broadband Wireless Industry Since 1993
Cisco Press Author - "Deploying License-Free Wireless WANs"
WISPs - Do you know where your customers are?
For wireless coverage mapping see http://www.ask-wi.com/mapping
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<http://www.linkedin.com/in/jackunger>
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Serving the Broadband Wireless Industry Since 1993
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WISPs - Do you know where your customers are?
For wireless coverage mapping see http://www.ask-wi.com/mapping
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