BibTeX for papers by David Kotz; for complete/updated list see https://www.cs.dartmouth.edu/~kotz/research/papers.html @Misc{pierson:snap-patent, author = {Timothy J. Pierson and Ronald Peterson and David F. Kotz}, title = {{System and method for proximity detection with single-antenna device}}, howpublished = {U.S. Patent 11,871,233; International Patent Application WO2019210201A1}, year = 2024, month = {January}, day = 9, URL = {https://www.cs.dartmouth.edu/~kotz/research/pierson-snap-patent/index.html}, note = {Priority date 2018-04-27; Filed 2019-04-26; Published 2021-07-29, Issued 2024-01-09}, abstract = {A single-antenna device includes a single antenna, at least one processor, and at least one memory. The single-antenna device is operable to receive a signal including at least one frame. Each of said frame includes a repeating portion. The single-antenna device determines a difference of phase and amplitude of the repeating portion and further determines whether the signal is transmitted from a trusted source based at least in part on the difference of phase and amplitude of the repeating portion.}, }