On 02/24/2018 05:34 AM, suraj hanchinal wrote: > Hello Everyone, > I am planning to apply for GSoc 2018. I was very interested and would > love to work on the gr-radar toolbox. I was interested specifically in > implementing passive-radar and multi-antenna support to gr-radar. Since > a passive radar system would need a multi-antenna support anyways, I > think they could be implemented together. I have been reading some > research papers regarding passive radars to get a better understanding > and I think implementing a passive radar to use FM transmitters nearby > to locate objects as a good starting point and then turn to using wifi > access points in an area as the next step. I am currently developing a > proper write-up as well for the same. I would kindly request you to > point out any things I should know of or just general suggestions on the > subject. I would also kindly request the mentors Martin Braun and Stefan > Wansch to enlighten me on this.
Suraj, thanks for your interest in GSoC and gr-radar! Passive radar would indeed be a pretty nifty addition. It's probably easier to get better results using more high-bandwidth signals with better cross-correlation properties, such as terrestrial TV stations. Note that I assume that you have some familiarity with the signal processing fundamentals of passive radar. That said, you can do a lot better than cross-correlating when doing passive radar with OFDM signals, but that's a little too much to lay out in a short email (in a nutshell, you can recreate the original tx'd signal and use symbols as samples in the time-frequency domain to generate range/Doppler diagrams without having to worry about cross-correlation artefacts). Also go check out Juha Vierinen's work (e.g., this: https://hackaday.com/2015/06/05/building-your-own-sdr-based-passive-radar-on-a-shoestring/, an old blog post I googled real quick). And of course Jean-Michel's work that Phil mentioned. -- M _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
