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Subject: Re: [geda-user] Wireless communication 101
To: geda-user AT delorie DOT com
References: <70C4A238-D361-4A6C-A81D-CBF019CADC4F AT icloud DOT com>
From: "Dave McGuire (mcguire AT neurotica DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Message-ID: <5601AE56.2050706@neurotica.com>
Date: Tue, 22 Sep 2015 15:39:02 -0400
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On 09/22/2015 02:51 AM, Chris Smith (space DOT dandy AT icloud DOT com) [via
geda-user AT delorie DOT com] wrote:
> Can anyone recommend any good texts or online resources dealing with
> the practical considerations of wireless communication, particularly
> discussion of techniques to improve performance in non-optimal
> environments?
> 
> I have a project using an off-the-shelf 433 MHz transmitter and
> receiver, which works well at home but fails in other environments.
> I obviously can’t change the transmitter/receiver hardware, but I’m
> interested in anything I can change, such as antenna choice, encoding
> algorithms, transmission strategy, which would help produce a robust
> system.
> 
> I’m also interested in methods of measuring what’s happening in the
> environment, to figure out what’s causing the problem.

  This is a really, really big subject.  I hope you have an appreciation
for that.  It isn't something like "This GPIO line isn't toggling when
it should be, what could be wrong?"  ...there's a whole very large field
behind what you're doing, and people study it for years to be able to
wrangle it.  That's why nobody has responded to your question.

  A good start for practical-almost-to-a-fault RF stuff is the ARRL
Handbook, whether you have any interest in amateur radio or not.

  That said...if you describe what actual problem you're having, someone
here might be able to assist, if people would tolerate the off-topicness
of it.

              -Dave

-- 
Dave McGuire, AK4HZ
New Kensington, PA