[opendtv] Re: News: WirelessHD Consortium
- From: John Willkie <johnwillkie@xxxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Mon, 6 Nov 2006 19:53:58 -0800 (GMT-08:00)
Which, as I pointed out at the beginning of this thread, has virtually nothing
to do with the consortium's proposal, except that it uses similar frequencies.
I guess you lost the concept that FM uses licensed spectrum and suffers only
minimal interference, and that CB uses unlicensed spectrum and is full of
interference.
And, that there is a world of difference between enjoying 60ghz in your home on
an unlicensed and minimally interfering basis, and trying to get a 60-ghz
signal to travel up to 1.2 miles reliably without the protection of a license
that gives you more protection from interference.
I would point out that in the higher frequency bands, what is unlicensed today
today tends to become licensed tomorrow (above 100 mw)
John Willkie
-----Original Message-----
>From: Bob Miller <robmxa@xxxxxxxxx>
>Sent: Nov 6, 2006 7:44 PM
>To: opendtv@xxxxxxxxxxxxx
>Subject: [opendtv] Re: News: WirelessHD Consortium
>
>The distance we are talking about is up to 2 kM for 60 GHz and up to 5
>miles for 70-90 GHz. The beam is very narrow and say only 12 ft in
>diameter at receiver. More like laser than cb or FM.
>
>Bob Millr
>
>On 11/6/06, John Willkie <johnwillkie@xxxxxxxxxxxxx> wrote:
>> yeah, unlicensed spectrum is so much better than licensed (primary user)
>> spectrum to send signals over distance.
>>
>> think cb versus FM radio.
>>
>> John Willkie
>>
>> -----Original Message-----
>> >From: Bob Miller <robmxa@xxxxxxxxx>
>> >Sent: Nov 1, 2006 1:34 PM
>> >To: opendtv@xxxxxxxxxxxxx
>> >Subject: [opendtv] Re: News: WirelessHD Consortium
>> >
>> >As far as I know that is all licensed spectrum, LMDS/MMDS, none of
>> >which I own. Also had a lot of problems with LMDS spectrum years ago.
>> >No, I like the very high directionality of this spectrum in the 60 GHz
>> >and 80-90 GHz and I like the fact that 60 GHz is unlicensed and 80-90
>> >is minimally licensed. That is a fee for and quick registration of
>> >only.
>> >
>> >Have no problem with IEEE 802.16 but I believe it is designed more for
>> >a shared shotgun RF use and not for the rifle shot full duplex
>> >multiple Gbps connections I am interested in.
>> >
>> >Bob Miller
>> >
>> >On 11/1/06, Manfredi, Albert E <albert.e.manfredi@xxxxxxxxxx> wrote:
>> >> Bob Miller wrote:
>> >>
>> >> > Line of sight yes but I don't think bird fade is an
>> >> > issue, more like window washer fade. The beam is
>> >> > spread near the transmitter and receiver. At low
>> >> > cost you could envision all nodes having multiple
>> >> > transceivers with each being full duplex backups of
>> >> > each other. A meshy redundant network
>> >>
>> >> Bob, I still don't understand what you are creating here.
>> >>
>> >> The article we're referring to talked about a 10 meter range system, for
>> >> internal hookup of audio/video equipment where the video can be
>> >> uncompressed. A wireless form of HDMI, if you will. That's why the
>> >> comparison with UWB, which is intended for a similar mission, or maybe
>> >> better characterized as "wireless USB."
>> >>
>> >> You seem to be adressing something else. If you are trying to use a 60
>> >> GHz carrier for a two-way last mile link, then what's wrong with the
>> >> existing IEEE 802.16, MMDS/LMDS, which is already a standard that takes
>> >> you all the way up to 66 GHz, and does so with any number of optional
>> >> encapsulations (i.e. even ATM, if you like)?
>> >>
>> >> Bert
>> >>
>> >>
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