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US 12,744,581 B2Granted
Method, apparatus and computer program
AssigneeNokia Technologies Oy
InventorsOana-Elena Barbu, Benny Vejlgaard, Johannes Harrebek
Life of this patent
Estimating the term…
Abstract
There is provided an apparatus including receiving, at a second node, a signal including contributions of at least one backscatter signal and at least one further signal, the at least one backscatter signal being transmitted by a respective at least one passive device in response to a first node transmitting a first signal to the at least one passive device; isolating the contribution of the at least one backscatter signal from the at least one further signal; and based on the contribution of the at least one backscatter signal, determining, by the second node, one or more parameters associated with the respective at least one passive device.
Claims11
An apparatus, comprising:
- at least one processor;
- and
- at least one non-transitory memory storing instructions that, when executed by the at least one processor, cause the apparatus to perform:
- receiving, at a second node, a signal comprising contributions of at least one backscatter signal and at least one further signal, the at least one backscatter signal being transmitted by at least one passive device in response to a first node transmitting a first signal to the at least one passive device, wherein the at least one further signal comprises the first signal and at least one additional signal;
- isolating the contribution of the at least one backscatter signal from the first signal and the at least one additional signal, wherein isolating comprises:
- demodulating the received signal;
- based on demodulating the received signal, regenerating the first signal as transmitted and the at least one additional signal as transmitted;
- estimating a first channel response based on the regenerated first signal as transmitted;
- estimating a second channel response based on the regenerated at least one additional signal as transmitted;
- reconstructing the first signal as received based on the regenerated first signal as transmitted and the estimated first channel response;
- reconstructing the at least one additional signal as received based on the regenerated at least one additional signal as transmitted and the estimated second channel response;
- and
- removing the reconstructed first signal as received and the reconstructed at least one additional signal as received from the received signal to produce a remaining signal comprising the contribution of the at least one backscatter signal;
- and
- based on the contribution of the at least one backscatter signal, determining, by the second node, one or more parameters associated with the at least one passive device.
12 more elements
A method, comprising:
- receiving, at a second node, a signal comprising contributions of at least one backscatter signal and at least one further signal, the at least one backscatter signal being transmitted by a respective at least one passive device in response to a first node transmitting a first signal to the at least one passive device, wherein the at least one further signal comprises the first signal;
- isolating the contribution of the at least one backscatter signal from the at least one further signal, wherein isolating comprises:
- demodulating the received signal;
- based on demodulating the received signal, regenerating the first signal as transmitted;
- estimating a channel response based on the regenerated first signal as transmitted;
- reconstructing the first signal as received based on the regenerated first signal as transmitted and the estimated channel response;
- and
- removing the reconstructed first signal as received from the received signal to produce a remaining signal comprising the contribution of the at least one backscatter signal;
- and
- based on the contribution of the at least one backscatter signal, determining, by the second node, one or more parameters associated with the at least one passive device.
7 more elements
A non-transitory computer-readable storage device readable by an apparatus, tangibly embodying a program of instructions that, when executed by the apparatus, cause the apparatus to perform:
- receiving, at a second node, a signal comprising contributions of at least one backscatter signal and at least one further signal, the at least one backscatter signal being transmitted by a respective at least one passive device in response to a first node transmitting a first signal to the at least one passive device, wherein the at least one further signal comprises the first signal;
- isolating the contribution of the at least one backscatter signal from the at least one further signal, wherein isolating comprises:
- demodulating the received signal;
- based on demodulating the received signal, regenerating the first signal as transmitted;
- estimating a channel response based on the regenerated first signal as transmitted;
- reconstructing the first signal as received based on the regenerated first signal as transmitted and the estimated channel response;
- and
- removing the reconstructed first signal as received from the received signal to produce a remaining signal comprising the contribution of the at least one backscatter signal;
- and
- based on the contribution of the at least one backscatter signal, determining, by the second node, one or more parameters associated with the at least one passive device.
7 more elements
Dependencies are inferred from the claim text.