bradleeharr
commented
6 months ago Hi! Thanks for the suggestion. It would have been a good idea to add the data from my recordings. Unfortunately, I no longer have the data and don't have an SDR on me right now to do my own FM recording. Luckily, for this project, I just recorded plain FM signals and added targets as a simulation. You can do similar things with any FM dataset if you can find one or get a recording of one.
For reference, at https://iqengine.org/browser there are some recordings that people have posted from SDRs. A similar recording to the one that I was working with would be the analog_FM_France recording.
This recording has a 'sigMF' data type, which isn't the same as the raw samples I used, so you do have to process them. You should be able to use GNU Radio similarly to how I used it to capture the RTL-SDR data by putting the SigMF file as the file source in a 'SigMF Source' Block:
I added a flowgraph which acts as an FM radio receiver and does this file saving, which you could use to extract the data from the recording https://github.com/bradleeharr/PassiveRadarSim/blob/main/FM_radio_example.grc
As a sanity check, for the FM France recording, the CAFs look like they work OK in simulation
An interesting extension now would be to use some of the real recordings of passive radar, like 171210_seconddataset_ship_ch1 where a real passive radar set up is used and one antenna is pointed at a radio transmitter for the reference signal while another is pointed towards ships at a port. I'll leave that for now, but that would be a good follow-up experiment
missinglee
No data from the experiment seems to have been provided,Thank you very much if you can provide