Enodeb reference signal reduction
First Claim
Patent Images
1. An eNodeB (eNB) comprising:
- a plurality of antenna ports with a plurality of antenna elements;
subspace identification circuitry coupled with the plurality of antenna elements, the subspace identification circuitry to;
identify, based on feedback information, a plurality of beamforming weights for one or multiple antenna ports wherein a number of the antenna ports is less than a number of the plurality of antenna elements; and
assign a beamforming weight in the plurality of beamforming weights to an antenna in the plurality of antenna elements; and
transmitter circuitry coupled with the subspace identification circuitry, the transmitter circuitry to;
beamform a channel training signal allocated for the one or multiple antenna ports with the assigned beamforming weight; and
transmit an antenna port configuration schedule from the plurality of antenna elements.
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Abstract
In embodiments, apparatuses, methods, and storage media may be described for reducing the overhead associated with the transmission of channel training signals from an eNodeB (eNB) of a wireless network. Specifically, the eNB may receive feedback from a user equipment (UE) regarding the received signal energy of a first and second beamformed signal produced with a first and second beamforming vector, respectively. The eNB may identify, based on the feedback of the received signal energy, a signal subspace and a null subspace. The eNB may then transmit a channel training signal to the signal subspace.
10 Citations
20 Claims
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1. An eNodeB (eNB) comprising:
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a plurality of antenna ports with a plurality of antenna elements; subspace identification circuitry coupled with the plurality of antenna elements, the subspace identification circuitry to; identify, based on feedback information, a plurality of beamforming weights for one or multiple antenna ports wherein a number of the antenna ports is less than a number of the plurality of antenna elements; and assign a beamforming weight in the plurality of beamforming weights to an antenna in the plurality of antenna elements; and transmitter circuitry coupled with the subspace identification circuitry, the transmitter circuitry to; beamform a channel training signal allocated for the one or multiple antenna ports with the assigned beamforming weight; and transmit an antenna port configuration schedule from the plurality of antenna elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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identifying, by an eNodeB (eNB), a first signal subspace in a space based at least in part on a first indication of a magnitude or a phase of a first received signal of a first beamforming signal using a first beamforming vector in the first signal subspace, the first signal subspace including the first beamforming vector; and identifying, by the eNB, a null subspace in the space based at least in part on a second indication of a magnitude or a phase of a second received signal of a second beamforming signal using a second beamforming vector in the null subspace, the null subspace including the second beamforming vector; and beamforming, from an antenna port of the eNB, a channel training signal to the first signal subspace. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. One or more non-transitory computer-readable media comprising instructions which, when executed by one or more processors of an eNodeB (eNB), cause the eNB to:
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identify a first signal subspace in a space based at least in part on a first indication of a magnitude or a phase of a first received signal of a first beamforming signal using a first beamforming vector in the first signal subspace, the first signal subspace including a first beamforming vector; identify a null subspace in the space based at least in part on a second indication of a magnitude or a phase of a second received signal of a second beamforming signal using a second beamforming vector in the null subspace, the null subspace including the second beamforming vector; and beamform a channel training signal to the first signal subspace. - View Dependent Claims (18, 19, 20)
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Specification