Backscatter-based positioning
AssigneeQUALCOMM Incorporated
InventorsXiaojie Wang, Jing Sun, Xiaoxia Zhang, Junyi Li
Life of this patent
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Abstract
This disclosure provides systems, methods, and devices for wireless communication that support backscatter-based positioning. In a first aspect, a method of wireless communication includes transmitting a configuration signal that indicates a tag address of a tag device and a modulation scheme for generation of a backscatter signal. The method also includes transmitting a positioning reference signal (PRS) after transmission of the configuration signal. The method further includes receiving, from the tag device, a backscatter signal based on the modulation scheme and the PRS. Other aspects and features are also claimed and described.
Claims26
A method of wireless communication performed by a network entity, the method comprising:
- transmitting a configuration signal that indicates a tag address of a tag device and a modulation scheme for generation of a backscatter signal;
- transmitting a positioning reference signal (PRS) after transmission of the configuration signal;
- receiving, from the tag device, a backscatter signal based on the modulation scheme and the PRS;
- correlating the backscatter signal and the PRS;
- and
- determining a round trip time (RTT) based on correlating the backscatter signal and the PRS.
A network entity comprising:
- at least one processor;
- and
- a memory coupled to the at least one processor, the at least one processor configured to:
- transmit a configuration signal that indicates a tag address of a tag device and a modulation scheme for generation of a backscatter signal;
- transmit a positioning reference signal (PRS) after transmission of the configuration signal;
- receive, from the tag device, a backscatter signal based on the modulation scheme and the PRS;
- correlate the backscatter signal and the PRS;
- and
- determine a round trip time (RTT) based on correlating the backscatter signal and the PRS.
A method of wireless communication performed by a tag device, the method comprising:
- receiving a configuration signal that indicates a tag address of the tag device and a modulation scheme for generation of a backscatter signal;
- configuring one or more components of the tag device based on the modulation scheme, wherein configuring the one or more components occurs during a tag processing delay period;
- receiving a positioning reference signal (PRS) after receipt of the configuration signal;
- and
- transmitting a backscatter signal based on the modulation scheme and the PRS, wherein transmitting the backscatter signal occurs after conclusion of the tag processing delay period.
A tag device comprising:
- at least one processor;
- and
- a memory coupled to the at least one processor, the at least one processor configured to:
- receive a configuration signal that indicates a tag address of the tag device and a modulation scheme for generation of a backscatter signal;
- configure one or more components of the tag device based on the modulation scheme, wherein configuring the one or more components occurs during a tag processing delay period;
- receive a positioning reference signal (PRS) after receipt of the configuration signal;
- and
- transmit a backscatter signal based on the modulation scheme and the PRS, wherein the backscatter signal is transmitted after conclusion of the tag processing delay period.
Dependencies are inferred from the claim text.