US 12,106,173 B2
Method for passive wireless channel estimation in radio frequency network and apparatus for same
Milutin Stanaćević, Smithtown, NY (US); Samir Das, Melville, NY (US); Petar Djurić, Setauket, NY (US); Athalye Akshay, Forest Hills, NY (US); Ryoo Jihoon, Incheon (KR); and Yasha Karimi, Selden, NY (US)
Assigned to The Research Foundation for The State University of New York, Albany, NY (US)
Filed by The Research Foundation for The State University of New York, Albany, NY (US)
Filed on Sep. 19, 2023, as Appl. No. 18/469,763.
Application 18/469,763 is a continuation of application No. 16/972,829, granted, now 11,763,106, previously published as PCT/US2019/035542, filed on Jun. 5, 2019.
Claims priority of provisional application 62/680,813, filed on Jun. 5, 2018.
Prior Publication US 2024/0005112 A1, Jan. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06K 7/10 (2006.01); G06K 19/07 (2006.01); G06K 19/077 (2006.01)
CPC G06K 7/10366 (2013.01) [G06K 19/0723 (2013.01); G06K 19/07773 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for estimating at least one characteristic of a wireless communication channel between at least two passive backscattering radio frequency (RF) nodes, the method comprising:
measuring backscatter channel state information (BCSI) during communication between the at least two passive RF nodes;
estimating, by at least one RF node of the at least two passive RF nodes, the at least one characteristic of the wireless communication channel based on the measured BCSI,
wherein the BCSI is a feature vector h(t)=[ΘBC AB ΔAE], with ΘBC, AB, and ΔAE being a backscatter channel phase, a backscatter amplitude, and a change in excitation amplitude between sampling intervals, respectively.