[wsfii-discuss] FCC license exemption in TV bands

[john wilson]

Spectrum effieciency is no straightforward matter. There are some technical 
issues - eg tropospheric ducting. A contact explains thus:

While the propagation at 700 MHz is indeed better than the other  unlicensed 
bands, this effect tends to be a curse as it is too good.   When 
tropospheric ducting occurs (aka skip), as it does fairly often,  then you 
can have signals from very remote locations appear to be  local and the 
resultant interference mess will be hard to deal with  even with a cognitive 
radio.

Cheers,
John (Open Spectrum UK)


>From: Ramon Roca <ramon.roca at guifi.net>
>Reply-To: Discuss list on the World Summit on Free Information 
>Infrastructure<wsfii-discuss at lists.okfn.org>
>To: Discuss list on the World Summit on Free Information 
>Infrastructure<wsfii-discuss at lists.okfn.org>
>Subject: Re: [wsfii-discuss] FCC license exemption in TV bands
>Date: Fri, 13 Oct 2006 16:51:04 +0200
>
>:)
>http://guifi.net/en/node/5719
>
>En/na Julian Priest ha escrit:
>>Hi All,
>>
>>bit of news on the spectrum policy agenda.
>>
>>It looks like the FCC are going to allow low power use of TV bands in
>>the US after analog switch off in 2009 with some indications that it
>>will be unlicensed.
>>
>>http://www.openspectrum.info/news-oct06-014.html
>>
>>This adds alot of weight to similar processes going on in other
>>countries.
>>
>>For instance in the UK OpenSpectrumUK submitted comments to an ofcom
>>consultation on the same topic (Digital Dividend Review) in May.
>>
>>http://openspectrum.org.uk/wiki/wikka.php?wakka=DigitalDividendPressRelease12May06
>>
>>cheers
>>
>>
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>>http://lists.okfn.org/mailman/listinfo/wsfii-discuss
>>
>>
>>
>
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