[cma-l] Singing posters and talking shirts stealing from your FM signal...

[Associated Broadcast Consultants]

Alternatively you could say the original transmission IS indeed unchanged.
It is the identical signal broadcast from a big mast miles away and there
is no way this system can change that.

What it's changing is the reflection environment from what I understand.
Maybe a bit analagous to sonar or radar.

But maybe I understand wrongly!

Glyn




On 9 March 2017 at 11:42, Alex Gray, Two Lochs Radio <tlr at gairloch.co.uk>
wrote:

> Exactly Ian -    I guess he means “…without *significantly* affecting the
> original transmissions…” or perhaps he’s found some new laws of physics.
>
>
>
> Interesting technique though if you read the full details. Reminds me of
> the cunning Russian passively bugged ‘friendship’ emblem that sat in the US
> Embassy in Moscow for some time. Also the (apocryphal I think) tale of the
> farmer prosecuted for lighting his house using power tapped off the near
> field of the Droitwich log wave transmitter.
>
>
>
> Alex
>
>
>
> *From:* cma-l-bounces at mailman.commedia.org.uk [mailto:
> cma-l-bounces at mailman.commedia.org.uk] *On Behalf Of *Ian Hickling
> *Sent:* 08 March 2017 22:37
> *To:* The Community Media Association Discussion List <
> cma-l at mailman.commedia.org.uk>
> *Subject:* Re: [cma-l] Singing posters and talking shirts stealing from
> your FM signal...
>
>
>
> ".......we developed a new way of communication where we send information
> by reflecting ambient FM radio signals that are already in the air, which
> consumes close to zero power.” The UW team has — for the first time —
> demonstrated how to apply a technique called “backscattering” to outdoor FM
> radio signals. The new system transmits messages by reflecting and encoding
> audio and data in these signals that are ubiquitous in urban environments,
> without affecting the original radio transmissions......"
> Oh yeah?
>
> Ian Hickling
>
> Partner
>
>
>
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-- 
Glyn Roylance - Principal Consultant
Associated Broadcast Consultants <http://www.a-bc.co.uk/>
<http://www.a-bc.co.uk/index.html>
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