4 ms·

What was it?

• masklinn 4y ago
  From what I understand, it was SDR[0] code which would allow using the antenna (possibly reconfigurable?[1]) into a passive radar aka a radar which tracks objects through their emissions (radio, bluetooth, wifi, ...) rather than emit electromagnetic waves and track their return. [0] https://en.wikipedia.org/wiki/Software-defined_radio https://en.wikipedia.org/wiki/Software-defined_radio [1] https://en.wikipedia.org/wiki/Reconfigurable_antenna https://en.wikipedia.org/wiki/Reconfigurable_antenna
  • mannykannot 4y ago
    In this case, it is not so much tracking things by their own transmissions, but by their reflection of ambient radio (here, broadcast TV.) https://spectrum.ieee.org/passive-radar-with-sdr https://spectrum.ieee.org/passive-radar-with-sdr (thanks to dmw_ng and snake_doc for the link.)
    • notanote 4y ago
      Previously discussed here: https://news.ycombinator.com/item?id=33333009 https://news.ycombinator.com/item?id=33333009
      • mannykannot 4y ago
        17 days from the HN front page to being shut down.
        • eskaytwo 4y ago
          It would have been the IEEE article that got the attention
    • masklinn 4y ago
      Oh that's cool, so it's a radar using ambient radio as illuminator?
      • samus 4y ago
        Indeed, it's so cool that it has military applications and gets restricted as a result.