I disagree. It might be quite a while before we can use them. But I think that there will be a technological solution if it looks like they will allow it.
Heck, they've already said that OOB has to be 55dB BELOW the interference level for adjacent channel use. I forget what that interference level is. Someday it'll be possible to create a WISP type device that'll only need a 2KHz guard band in order to protect the TV sets from interference. The difference in an analyzer trace between 802.11b and g is pretty amazing already. http://www.bvsystems.com/Products/Software/Beekeeper/spectrumanalysis.gif That was b mode. http://www.tomsguide.com/us/atheros-super,review-202-4.html Those are g mode. laters, Marlon (509) 982-2181 (408) 907-6910 (Vonage) Consulting services 42846865 (icq) WISP Operator since 1999! [EMAIL PROTECTED] www.odessaoffice.com/wireless www.odessaoffice.com/marlon/cam ----- Original Message ----- From: "Jack Unger" <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Wednesday, November 19, 2008 12:32 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! >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -------------------------------------------------------------------------------- >>>>>> WISPA Wants You! Join today! >>>>>> http://signup.wispa.org/ >>>>>> -------------------------------------------------------------------------------- >>>>>> >>>>>> WISPA Wireless List: wireless@wispa.org >>>>>> >>>>>> Subscribe/Unsubscribe: >>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>> >>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> ------------------------------------------------------------------------------ >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -------------------------------------------------------------------------------- >>>>>> WISPA Wants You! Join today! >>>>>> http://signup.wispa.org/ >>>>>> >>>>>> -------------------------------------------------------------------------------- >>>>>> >>>>>> WISPA Wireless List: wireless@wispa.org >>>>>> >>>>>> Subscribe/Unsubscribe: >>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>> >>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>> >>>>>> >>>>>> -------------------------------------------------------------------------------- >>>>>> WISPA Wants You! Join today! >>>>>> http://signup.wispa.org/ >>>>>> -------------------------------------------------------------------------------- >>>>>> >>>>>> WISPA Wireless List: wireless@wispa.org >>>>>> >>>>>> Subscribe/Unsubscribe: >>>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>>> >>>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>> -- >>>>> Jack Unger - President, Ask-Wi.Com, Inc. >>>>> 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 >>>>> FCC Lic. #PG-12-25133 LinkedIn Profile >>>>> <http://www.linkedin.com/in/jackunger> >>>>> Phone 818-227-4220 Email <[EMAIL PROTECTED]> >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> -------------------------------------------------------------------------------- >>>>> WISPA Wants You! Join today! >>>>> http://signup.wispa.org/ >>>>> -------------------------------------------------------------------------------- >>>>> >>>>> WISPA Wireless List: wireless@wispa.org >>>>> >>>>> Subscribe/Unsubscribe: >>>>> http://lists.wispa.org/mailman/listinfo/wireless >>>>> >>>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>>> >>>>> >>>>> >>>> >>>> -------------------------------------------------------------------------------- >>>> WISPA Wants You! Join today! >>>> http://signup.wispa.org/ >>>> -------------------------------------------------------------------------------- >>>> >>>> WISPA Wireless List: wireless@wispa.org >>>> >>>> Subscribe/Unsubscribe: >>>> http://lists.wispa.org/mailman/listinfo/wireless >>>> >>>> Archives: http://lists.wispa.org/pipermail/wireless/ >>>> >>>> >>>> >>>> >>> -- >>> Jack Unger - President, Ask-Wi.Com, Inc. >>> 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 >>> FCC Lic. #PG-12-25133 LinkedIn Profile >>> <http://www.linkedin.com/in/jackunger> >>> Phone 818-227-4220 Email <[EMAIL PROTECTED]> >>> >>> >>> >>> >>> >>> -------------------------------------------------------------------------------- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> -------------------------------------------------------------------------------- >>> >>> WISPA Wireless List: wireless@wispa.org >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >>> >>> >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: wireless@wispa.org >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> > > -- > Jack Unger - President, Ask-Wi.Com, Inc. > 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 > FCC Lic. #PG-12-25133 LinkedIn Profile > <http://www.linkedin.com/in/jackunger> > Phone 818-227-4220 Email <[EMAIL PROTECTED]> > > > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
