[chbot] Planning for the next few weeks - SDR Experts?

[Trevor Wignall]

Hi all
As a Wandersearch responder (i.e. someone who goes out with a directional
receiver and tries to locate the small transmitter pendants worn by people
who tend to go wandering e.g. dementia patients), I am looking at using a
Software Defined Radio (SDR) to receive these signals. However as the
signals are weak, I am looking for ways of extracting the short transmitted
pulses (around 100-200 milliseconds of unmodulated carrier) from the
background noise using narrow band filtering. The problem is that the exact
transmitter frequency is not known due to tolerances, temperature changes
etc.
If anyone familiar with SDRs would like a challenge to combat boredom, any
help would be appreciated.
Trevor

On Sun, Mar 22, 2020 at 11:28 AM Mark Atherton <markaren1 at xtra.co.nz> wrote:

> One more time, this go includes the Robotics group in the to: list :)
>
>
> Greetings Robotters.
>
>
> This is more of a brain-dump than anything too coherent; please
> contribute ideas as required.
>
> The next few weeks are going to be rather interesting to say the least,
> and while some of us relish the thought of time alone, others may be
> concerned about boredom creeping in.
>
> Spare time, does of course mean opportunity, and with a little planning,
> things can be done, plates can be spun, and progress can be made.
>
> Things that come to mind include the following:
>
> Develop. Something rattling around in your head for a while and needs
> implementing, is it time to get out the soldering
> iron/keyboard/angle-grinder and get going on it ?
>
> Repair. Broken things tend to accumulate. Not sure how to repair it -
> ask here, or find a specialist forum.
>
> Clear out. Sinking in it ? Round it up, and chuck it out.
>
> Document. Surrounded by lots of interesting complete projects, but
> little published work ? Maybe it's time to open a hackaday account, and
> start reporting your progress and projects to the world ?
>
> Learn. Stuff you are interested in ? Find a forum, an online resource,
> youtube - get stuck in. Not sure what the question is ? Ask here, we may
> know what you are trying to do and give some ideas about how to find
> required resources.
>
> Educate. Time to give back ? Maybe find a forum who could do with a
> mentor. Contribute.
>
> Stock up. Not sure how long the electronic component suppliers are going
> to be open for, so maybe it's time to pay a visit to Jaycar/South Island
> Components/Ecotech/Molten Media and load up with stuff while they are
> open. They may have to close for a while, and an acute widget shortage
> can be frustrating.
>
> Share. I hate that phrase, but in this context, you may have stuff
> surplus which may be useful to others. Give to the other givers first ?
>
> Scrounge. If you have a specific project in mind (not just stocking up)
> put out a Request-For-Scrounge (RFS). You might be amazed what stuff
> people have squirrelled away.
>
> As usual, lurkers, and regulars alike, please speak up about projects,
> ideas etc. Please keep the subject line of messages updated to track
> content.
>
> Things will return to some kind of normal over the next few weeks, but
> busy hands, fingers and keyboards can alleviate the stress of change.
>
> Comments, updates, and suggestions as usual are always welcome.
>
> Keep safe.
>
> -Mark
>
> PS I have copied a few non-robot-group members who seem relevant to this
> topic. Please sign up to be included in any of our discussions via
> kiwibots.org or directly at
> https://lists.ourshack.com/mailman/listinfo/chchrobotics As a (nearly)
> French person once said "I will say this only once"
>
>
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