Closed form singular value decomposition
First Claim
1. A method comprising:
- determining, at a client station, a plurality of singular vectors for channels used in a multiple-input multiple-output (MIMO) transmission from a base station to the client station;
providing, by the client station, a first indication to the base station to use a singular value decomposition, when a first one of the plurality of singular vectors is substantially larger than a second one of the plurality of singular vectors; and
providing, by the client station, a second indication to the base station to use a uniform channel decomposition, when the first one of the plurality of singular vectors is not substantially larger than the second one of the plurality of singular vectors.
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Accused Products
Abstract
The subject matter disclosed herein provides methods and apparatus for determining a singular value decomposition, providing feedback from a client station to a base station, and closed loop operation of a wireless system implementing multiple-input multiple-output (MIMO). The method may include determining one or more singular vectors using a closed form singular value decomposition. The one or more determined singular vectors may be provided to a precoder at the base station as feedback. The method may include aligning a phase of one or more singular vectors. The method may also include determining, at a client station, a plurality of singular vectors for channels used in a MIMO transmission from a base station to a client station. The client station may provide an indication to the base station regarding whether to use a singular value decomposition or a uniform channel decomposition. Related systems, apparatus, methods, and/or articles are also described.
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Citations
8 Claims
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1. A method comprising:
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determining, at a client station, a plurality of singular vectors for channels used in a multiple-input multiple-output (MIMO) transmission from a base station to the client station; providing, by the client station, a first indication to the base station to use a singular value decomposition, when a first one of the plurality of singular vectors is substantially larger than a second one of the plurality of singular vectors; and providing, by the client station, a second indication to the base station to use a uniform channel decomposition, when the first one of the plurality of singular vectors is not substantially larger than the second one of the plurality of singular vectors. - View Dependent Claims (2, 3)
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4. A method comprising:
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receiving, at a base station from a client station, a first indication to use a singular value decomposition, when a first one of a plurality of singular vectors is substantially larger than a second one of the plurality of singular vectors; receiving, at the base station from the client station, a second indication to use a uniform channel decomposition, when the first one of the plurality of singular vectors is not substantially larger than the second one of the plurality of singular vectors; and configuring the base station for transmission based on at least one of the first indication or the second indication received from the client station.
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5. A client station comprising:
a channel estimator and a processor configured to; determine a plurality of singular vectors for channels used in a multiple-input multiple-output (MIMO) transmission from a base station to the client station; provide, via a radio interface, a first indication to the base station to use a singular value decomposition, when a first one of the plurality of singular vectors is substantially larger than a second one of the plurality of singular vectors; and provide, via the radio interface, a second indication to the base station to use a uniform channel decomposition, when the first one of the plurality of singular vectors is not substantially larger than the second one of the plurality of singular vectors. - View Dependent Claims (6, 7)
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8. A base station comprising:
a precoder and a processor configured to; receive from a client station, via a radio interface, a first indication to use a singular value decomposition, when a first one of a plurality of singular vectors is substantially larger than a second one of the plurality of singular vectors; receive from the client station, via the radio interface, a second indication to use a uniform channel decomposition, when the first one of the plurality of singular vectors is not substantially larger than the second one of the plurality of singular vectors; and configure the base station for transmission based on at least one of the first indication or the second indication received from the client station.
Specification