Efficient beam search methods for three-dimensional beamforming with non-precoded reference signals
AssigneeIntel IP Corporation
InventorsYeong-Sun HWANG, Franz EDER, Ziyang JU
Life of this patent
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Abstract
A method and apparatus for three-dimensional beamforming, which include an estimation of a channel spatial coherence for a beam space of a device based on a plurality of non-precoded reference signals such that the beam space includes a plurality of beam subspaces based on the estimated channel spatial coherence and each of the plurality of beam subspaces include a beam direction representative of a respective beam subspace of the plurality of beam subspaces. Furthermore, a selection a beam subspace of the plurality of beam subspaces based on a channel quality metric of the beam direction that is representative of the beam subspace is included.
Claims23
A method for three-dimensional beamforming, the method comprising:
- estimating a channel spatial coherence for a beam space of a terminal device based on a plurality of non-precoded reference signals, the beam space comprising a plurality of beam subspaces, each of the plurality of beam subspaces including a beam direction representative of a respective beam subspace of the plurality of beam subspaces;
- and
- selecting, by the terminal device, a beam subspace of the plurality of beam subspaces based on a channel quality metric of the beam direction that is representative of the beam subspace.
A device for three-dimensional beamforming, the device comprising:
- an estimation circuit configured to estimate a channel spatial coherence for a beam space of a device based on a plurality of non-precoded reference signals, the beam space comprising a plurality of beam subspaces based on the estimated channel spatial coherence, each of the plurality of beam subspaces including a beam direction representative of a respective beam subspace;
- a selection circuit configured to select a beam subspace of the plurality of beam subspaces based on a channel quality metric of the beam direction that is representative of the selected beam subspace;
- and
- a processing circuit configured to generate a feedback signal indicating the beam direction that is representative of the beam space.
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A non-transitory computer readable medium storing instructions that when executed by processing circuitry of a device cause the device to perform a method comprising:
- estimating a channel spatial coherence for a beam space of a terminal device based on a plurality of non-precoded reference signals, the beam space comprising a plurality of beam subspaces, each of the plurality of beam subspaces including a beam direction representative of a respective beam subspace of the plurality of beam subspaces;
- and
- selecting, by the terminal device, a beam subspace of the plurality of beam subspaces based on a channel quality metric of the beam direction that is representative of the beam subspace.
Dependencies are inferred from the claim text.