I worked on applications similar to your PCL: Coherent backscatter systems for long-range RFID. It was really fun to apply "old school" techniques such as phas

I worked on applications similar to your PCL: Coherent backscatter systems for long-range RFID. It was really fun to apply "old school" techniques such as phased array direction of arrival and FMCW ranging for passive RFID tags. What used to consume entire tabletops is now condensed into exceedingly capable software defined radios. It's insane what you can get for a couple-$k from places like Ettus: https://www.ettus.com/ https://www.ettus.com/