Re: INDOOR Positioning: New Solutions for Challenging Applications
From: Dale DePriest (Dale_at_gpsinformation.het)
Date: 08/04/04
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Date: Wed, 04 Aug 2004 09:46:18 -0700
Try
http://www.rosum.com/rosum_tv-gps_indoor_location_technology.html
The basics are that a TV antenna is at a fixed location, The TV signal
contains a timestamp which can be used in the same way as a time stamp
in GPS. Thus 3 stations can results in a 2D fix in the same way that it
is done in a GPS system by getting pseudo ranges and then correcting.
You cannot get a 3D fix. Augmentation can be provided by another source
that provides clock correction data for the individual TV stations. It
doesn't work very well if all the stations in your area pick the same
hill for the transmitter towers.
Dale
Hans-Georg Michna wrote:
> On Tue, 03 Aug 2004 09:41:08 -0700, Dale DePriest
> <Dale@gpsinformation.net> wrote:
>
>
>>Hardly first, I am afraid. There are already patents on this technology.
>
>
> Dale,
>
> really? Well, at least I am inventive. (:-)
>
> Hans-Georg
>
--
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o/_/ (_(_X_(` For GPS and GPS/PDAs
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