"5G Localization and Context-Awareness"
https://www.5gitaly.eu/2018/wp-content/uploads/2019/01/5G-It...
Or how about this one, "5G Network-Based Passive Radar". I don't have access to the full text, but the abstract tells me enough:
> This paper presents the pioneering results of successful target detection using a fully operational and cooperative 5G cellular network as a source of illumination in a passive radar system.
https://ieeexplore.ieee.org/abstract/document/9661315
Or this one, a high level technical roadmap: "Enabling Joint Communication and Radar Sensing in Mobile Networks -- A Survey"
https://arxiv.org/abs/2006.07559
Another one: "High-Accuracy Localization for Assisted Living - 5G systems will turn multipath channels from foe to friend" (300+ citations)
https://wides.usc.edu/Updated_pdf/witrisal2016.pdf
There are at minimum dozens of peer reviewed articles about both active and passive sensing and localization applications of mm-wave antenna arrays of all sorts, including those involved in the 5G project. I can't list them all, but here are some keywords you can use in google scholar:
- device free localization
- passive localization
- perceptive mobile networks
- passive sensing
- passive identification
- joint communication and sensing
Just add "5G", "mobile networks" or "mm-wave antenna array" and you're good to go