Post-analog beamformed channel impulse response reporting for multiple user multiple-input-multiple-output scheduling and beamforming
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a first indication of a set of analog receive beams and an instruction to report one or more post-analog-beamformed channel impulse responses (CIRs) that are based at least in part on the set of analog receive beams. The UE may transmit a second indication of a CIR report that indicates the one or more post-analog-beamformed CIRs. Numerous other aspects are described.
1 . An apparatus for wireless communication at a user equipment (UE), comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to cause the UE to:
receive a first indication of a set of analog receive beams and an instruction to report one or more post-analog-beamformed channel impulse responses (CIRs) that are based at least in part on the set of analog receive beams; and
transmit a second indication of a CIR report that indicates the one or more post-analog-beamformed CIRs.
2 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the UE to:
generate, for each analog receive beam in the set of analog receive beams, a respective set of measurement metrics using multiple instances of a reference signal.
3 . The apparatus of claim 2 , wherein the one or more processors are further configured to cause the UE to:
generate a respective post-analog-beamformed CIR of the one or more post-analog-beamformed CIRs based at least in part on the multiple instances of the reference signal.
4 . The apparatus of claim 3 , wherein the one or more processors, to cause the UE to generate the respective post-analog-beamformed CIR, are configured to cause the UE to:
generate the respective post-analog-beamformed CIR as a respective frequency-domain averaged post-analog-beamformed CIR.
5 . The apparatus of claim 1 , wherein the CIR report indicates each post-analog-beamformed CIR of the one or more post-analog-beamformed CIRs using at least one of:
a quantized amplitude, or
a quantized phase.
6 . The apparatus of claim 1 , wherein the CIR report indicates the one or more post-analog-beamformed CIRs based at least in part on a beam matrix, the beam matrix being based at least in part on:
the set of analog receive beams, and
a set of analog transmit beams.
7 . The apparatus of claim 1 , wherein the instruction to generate the one or more post-analog-beamformed CIRs indicates to report a subset of post-analog-beamformed CIRs from a total number of available post-analog-beamformed CIRs, and
wherein the one or more processors are further configured to cause the UE to:
select, as the subset of post-analog-beamformed CIRs, the one or more post-analog-beamformed CIRs from the total number of available post-analog-beamformed CIRs using a selection criterion.
8 . The apparatus of claim 1 , wherein the instruction to generate the one or more post-analog-beamformed CIRs indicates a selection criterion to use in selecting the one or more post-analog-beamformed CIRs, and
wherein the one or more processors are further configured to cause the UE to:
select the one or more post-analog-beamformed CIRs based at least in part on the selection criterion.
9 . The apparatus of claim 1 , wherein the one or more processors are further configured to cause the UE to:
receive multiple user multiple-input-multiple-output (MU-MIMO) selection procedure configuration information that indicates a set of analog transmit beams to use for reception of one or more reference signals.
10 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving a first indication of a set of analog receive beams and an instruction to report one or more post-analog-beamformed channel impulse responses (CIRs) that are based at least in part on the set of analog receive beams; and
transmitting a second indication of a CIR report that indicates the one or more post-analog-beamformed CIRs.
11 . The method of claim 10 , further comprising:
generating, for each analog receive beam in the set of analog receive beams, a respective set of measurement metrics using multiple instances of a reference signal.
12 . The method of claim 10 , wherein the CIR report indicates each post-analog-beamformed CIR of the one or more post-analog-beamformed CIRs using at least one of:
a quantized amplitude, or
a quantized phase.
13 . The method of claim 10 , wherein the CIR report indicates the one or more post-analog-beamformed CIRs based at least in part on a beam matrix, the beam matrix being based at least in part on:
the set of analog receive beams, and
a set of analog transmit beams.
14 . The method of claim 10 , wherein the instruction to generate the one or more post-analog-beamformed CIRs indicates to report a subset of post-analog-beamformed CIRs from a total number of available post-analog-beamformed CIRs, and
wherein the method further comprises:
selecting, as the subset of post-analog-beamformed CIRs, the one or more post-analog-beamformed CIRs from the total number of available post-analog-beamformed CIRs using a selection criterion.
15 . The method of claim 10 , wherein the instruction to generate the one or more post-analog-beamformed CIRs indicates a selection criterion to use in selecting the one or more post-analog-beamformed CIRs, and
wherein the method further comprises:
selecting the one or more post-analog-beamformed CIRs based at least in part on the selection criterion.
16 . The method of claim 10 , further comprising:
receiving multiple user multiple-input-multiple-output (MU-MIMO) selection procedure configuration information that indicates a set of analog transmit beams to use for reception of one or more reference signals.
17 . A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
receive a first indication of a set of analog receive beams and an instruction to report one or more post-analog-beamformed channel impulse responses (CIRs) that are based at least in part on the set of analog receive beams; and
transmit a second indication of a CIR report that indicates the one or more post-analog-beamformed CIRs.
18 . The non-transitory computer-readable medium of claim 17 , wherein the one or more instructions further cause the UE to:
generate, for each analog receive beam in the set of analog receive beams, a respective set of measurement metrics using multiple instances of a reference signal.
19 . The non-transitory computer-readable medium of claim 17 , wherein the one or more instructions further cause the UE to:
generate a respective post-analog-beamformed CIR of the one or more post-analog-beamformed CIRs based at least in part on the multiple instances of the reference signal.
20 . The non-transitory computer-readable medium of claim 19 , wherein the one or more instructions, that cause the UE to generate the respective post-analog-beamformed CIR, cause the UE to:
generate the respective post-analog-beamformed CIR as a respective frequency-domain averaged post-analog-beamformed CIR.