Switching frequency methods and apparatus for ambient backscatter networking and jamming

摘要

Two ambient backscatter modulation methods and embodiments are disclosed, pseudo FSK and shifted BPSK. Embodiments of a receiver of signals for those modulations are also disclosed. Both methods disclosed allow for frequency-based networking of multiple backscatter devices when signals from an ambient, modulated radio frequency (RF) source are used for illumination. Disclosed method and apparatus exploit the inherent variation of the ambient modulated illuminating signal and offers performance improvement. Aspects of the disclosed invention also provide methods for passive jamming of full duplex transceivers and methods for assisting RF source localization.