Spatial multiplexing by backscatter device with multiple antennas
AssigneeQUALCOMM Incorportated
InventorsMin Huang, Chao Wei, Kangqi Liu, Mingxi Yin, Rui Hu, Hao Xu
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Abstract
Certain aspects of the present disclosure provide techniques for wireless communications. One example method includes receiving, from a backscatter device, a spatial multiplexing capability report; transmitting, to the backscatter device, a reference signal reflection configuration; and transmitting, to the backscatter device, a transmission grant for a backscatter link.
Claims41
An apparatus for wireless communications by a network entity, comprising:
- at least one memory comprising computer-executable instructions;
- and
- one or more processors configured to execute the computer-executable instructions and cause the network entity to:
- receive, from a backscatter device, a spatial multiplexing capability report;
- transmit, to the backscatter device, a reference signal reflection configuration;
- and
- transmit, to the backscatter device, a transmission grant for a backscatter link.
An apparatus for wireless communications by a user equipment, comprising:
- at least one memory comprising computer-executable instructions;
- and
- one or more processors configured to execute the computer-executable instructions and cause the user equipment to:
- receive, from a backscatter device, a plurality of reflected reference signals;
- perform channel estimation based on the plurality of reflected reference signals;
- determine, based on the plurality of reflected reference signals, a number of spatial streams on the backscatter link between the backscatter device and the user equipment;
- receive, from the backscatter device, one or more reflected radio waves using the determined number of spatial streams;
- and
- determine received data based on the one or more radio waves and the one or more reflected radio waves.
An apparatus for wireless communications by a backscatter device, comprising:
- at least one memory comprising computer-executable instructions;
- and
- one or more processors configured to execute the computer-executable instructions and cause the backscatter device to:
- transmit, to a network entity, a spatial multiplexing capability report;
- receive, from the network entity, a reference signal reflection configuration;
- receive a plurality of reference signals;
- and
- transmit reflected reference signals by selectively modulating the reference signals according to the reference signal reflection configuration.
Dependencies are inferred from the claim text.