←back to thread

Things you can do with a Software Defined Radio (2024)

(blinry.org)
939 points mihau | 1 comments | 16 Sep 25 14:35 UTC | HN request time: 1.76s | source
Show context
ortusdux ◴[16 Sep 25 15:35 UTC] No.45263686[source]▶
I've been wanting to experiment with SDR triangulation. There are some off the shelf options, but I think it would be fun to cobble something together using dongles.

https://www.crowdsupply.com/krakenrf/krakensdr

replies(2): >>45264371 #>>45264424 #
colanderman ◴[16 Sep 25 16:28 UTC] No.45264424[source]▶
https://khanfar-spectrum-analyzer.web.app/ also has some phase-based direction-finding software and upcoming hardware.

For triangulation though, if you have a reference signal at a known location, TDoA (time difference of arrival) requires less hardware (just a single receiver at each location, e.g. an RTL-SDR). I don't know of any open-source software which does that though I've been slowly building some for my own use (it's pretty janky at the moment).

replies(2): >>45269217 #>>45270403 #
ortusdux ◴[16 Sep 25 22:42 UTC] No.45269217[source]▶
I want to experiment with stationary receivers around the perimeter of my property. It would be fun to document and pinpoint every RF source on my land, but I'd settle for being able to reliably find my dog.
replies(1): >>45275066 #
1. colanderman ◴[17 Sep 25 12:32 UTC] No.45275066[source]▶
Ah TDoA might not have the resolution you need for that, unless you are working with very wideband signals. Probably ~100 m resolution is the best you can get from it.