Subject:
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Re: tracking an IR beacon
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 7 Dec 1997 18:56:59 GMT
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Original-From:
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Gael WAICHE <gwaiche@easynet%Spamcake%.fr>
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Reply-To:
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(gwaiche@easynet)NoSpam(.fr)
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Viewed:
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959 times
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> Hmmmmmmmmmm... welllll.. if you are planning to use the GPUI series or
> equiv. as your detectors.. I think you may run into problems with
> attempting to detect critical time information about the modulated
> waverform. Namely, and I'm no expert on bandpass filters or PLL's
> buuuuuuuuuuuuuuuuuuut, it DOES take time for the receivers to "lock" onto
> a given frequency. This may obfuscate the very information you are
> attempting to quantitize. You may wish to, at this early juncture, use a
> different receiver... one that doesn't force to trust these little magic
> cubes.. and any liberties they may be taking with your signal.
> -d
I confirm what David is saying! Once i worked on some kind of beacon
using an PLL to find its frequency (we used a lm567) and it couldn't
work properly due to the response time of the PLL. An alternate solution
was to replace the PLL by a band-pass filter. It's much faster...
Gael
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Message is in Reply To:
 | | Re: tracking an IR beacon
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| (...) Hmmm...mmm... welllll.. if you are planning to use the GPUI series or equiv. as your detectors.. I think you may run into problems with attempting to detect critical time information about the modulated waverform. Namely, and I'm no expert on (...) (27 years ago, 7-Dec-97, to lugnet.robotics.handyboard)
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