Spatial listen before talk
First Claim
1. A method for wireless communication, comprising:
- receiving, from a serving base station, an indication of the channel between the serving base station and a user equipment (UE);
determining, by the UE, an effective channel between the serving base station and the UE based at least in part on the indication of the channel between the serving base station and the UE;
determining a whitening matrix based at least in part on a noise covariance matrix;
determining a precoder based at least in part on the whitening matrix and the effective channel between the serving base station and the UE; and
transmitting a reference signal precoded by the precoder.
1 Assignment
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Accused Products
Abstract
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit a precoded reference signal to prevent interference with an incoming signal from a base station. The UE may determine a precoder for the reference signal based at least in part on a whitening matrix. In some examples, the UE may determine the precoder based at least in part on the whitening matrix and an effective channel between the base station and the UE. The precoded reference signal may be used by devices in other wireless communications systems to avoid interfering with a signal being received by the UE. In some examples, the UE may alternatively or additionally transmit an indication of the number of additional layers of the link between the UE and the base station that may be nulled out for a second link.
32 Citations
18 Claims
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1. A method for wireless communication, comprising:
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receiving, from a serving base station, an indication of the channel between the serving base station and a user equipment (UE); determining, by the UE, an effective channel between the serving base station and the UE based at least in part on the indication of the channel between the serving base station and the UE; determining a whitening matrix based at least in part on a noise covariance matrix; determining a precoder based at least in part on the whitening matrix and the effective channel between the serving base station and the UE; and transmitting a reference signal precoded by the precoder. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for wireless communication, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to; receive, from a serving base station, an indication of the channel between the serving base station and a user equipment (UE); determine, by the UE, an effective channel between the serving base station and the UE based at least in part on the indication of the channel between the serving base station and the UE; determine a whitening matrix based at least in part on a noise covariance matrix; determine a precoder based at least in part on the whitening matrix and the effective channel between the serving base station and the UE; and transmit a reference signal precoded by the precoder. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification