US 12,307,314 B2
Adaptive configuration of multistatic tag backscatter
Simon Svendsen, Aalborg (DK); Johannes Harrebek, Aalborg (DK); and Benny Vejlgaard, Aalborg (DK)
Assigned to Nokia Technologies Oy, Espoo (FI)
Filed by Nokia Technologies Oy, Espoo (FI)
Filed on Aug. 7, 2023, as Appl. No. 18/366,336.
Claims priority of application No. 2212811 (GB), filed on Sep. 2, 2022.
Prior Publication US 2024/0078404 A1, Mar. 7, 2024
Int. Cl. G06K 19/077 (2006.01); G06K 7/10 (2006.01); G06K 19/07 (2006.01)
CPC G06K 19/07713 (2013.01) [G06K 7/10425 (2013.01); G06K 19/0726 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A network device, comprising:
at least one processor; and
at least one memory including computer program code;
wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the network device to:
transmit, to an illuminator for a passive tag, a request for transmitting an activation signal to the passive tag at a primary frequency and a first transmission power;
receive, from the illuminator, information about a harmonic frequency of a harmonic of the activation signal back-scattered from the passive tag, a received level of the harmonic and a distance between the illuminator and the passive tag, the received level of the harmonic being associated with a transmission power of the activation signal;
select at least one reader for the passive tag which is expected to be within reach of the harmonic of the activation signal back-scattered from the passive tag based on a position of the illuminator, the received level of the harmonic and the distance;
configure the illuminator to transmit the activation signal to the passive tag at the primary frequency and with a transmission power ensuring maximum harmonic generation at the passive tag; and
configure the at least one reader to receive the harmonic of the activation signal at the harmonic frequency.