On 03/05/2018 04:10 PM, suraj hanchinal wrote: > Thanks for the response. I was mainly interested in passive radar and > also was into the idea of passive WiFi radar. As I said I have been > reading research papers like this one > http://ieeexplore.ieee.org/document/6020778/ . This paper has a method > of using WiFi AP for passive target detection. This could further be > used for applications as well and the algorithms are also said to work > for other types of signals as well. I am also looking into WiFi passive > radar using symbol reconstruction as well for better results. What is > your opinion on this?
I think I may have read this in past, but I can't access it now (paywall). That said, it's a fun way to go forward. -- M > Thanking you, > Suraj Hanchinal > > On Mon, Mar 5, 2018 at 11:44 PM, Martin Braun <martin.br...@ettus.com > <mailto:martin.br...@ettus.com>> wrote: > > Suraj, (and going back to the ML), > > first question is: What are *you* interested in? We have suggested 4 > overarching topics (SAR, Passive Radar, Apps, Multi-antenna). You'd have > to be *extremely* productive to get more then one or two done during > GSoC. > > You've indicated interest in passive radar and multi-antenna, and > specifically pointed out the idea of using Wifi signals (great project!) > for passive radar. Frankly, if you can pull that off, that would cover > both the passive radar side, and the apps side (because you could build > something on top of your wifi passive radar to e.g. catch speeding cars, > or maybe do something completely different. > > Thinking outside of the wifi signal topic for a moment, there's plenty > of people who have done passive radar with GNU Radio, but ironically not > with gr-radar. A simple cross-correlation approach based on any existing > broadcast signal would be a good start, too. Plus, you can use wifi > dongles for such an application. It would be nice to have out-of-the-box > passive radar experiments ready to run provided in gr-radar. > Another "downside" of the current codes is that for experiments, you > need devices that have both native support for timed commands, high > bandwidth, and Tx capabilities -- basically, USRPs. A passive radar > example could also work with RTL SDR dongles. That would be a cheaper > intro to the toolbox. > > Cheers, > Martin > > On 03/05/2018 06:50 AM, suraj hanchinal wrote: > > Thanks a lot for the response. I have read about the passive radar > > signal processing as well as parts of your thesis on ofdm radar to > > familiarise myself with the above mentioned technique. I have also > > studied the entire code of gr- radar to familiarise myself with that. I > > am also reading up on research papers for the same. I wanted to ask > > about the scope of the implementation in the sense that what should the > > extension to the toolbox contain. Please enlighten me on this. > > > > Thanking you, > > Suraj Hanchinal > > > > On Mar 1, 2018 1:19 AM, "Martin Braun" <martin.br...@ettus.com > <mailto:martin.br...@ettus.com> > > <mailto:martin.br...@ettus.com <mailto:martin.br...@ettus.com>>> > wrote: > > > > 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/ > > <https://hackaday.com/2015/06/05/building-your-own-sdr-based-passive-radar-on-a-shoestring/> > > > > <https://hackaday.com/2015/06/05/building-your-own-sdr-based-passive-radar-on-a-shoestring/ > > <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 <mailto:Discuss-gnuradio@gnu.org> > <mailto:Discuss-gnuradio@gnu.org <mailto:Discuss-gnuradio@gnu.org>> > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio> > > <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > <https://lists.gnu.org/mailman/listinfo/discuss-gnuradio>> > > > > > > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio