Closed form singular value decomposition
First Claim
1. A method for use in a client station, the method comprising:
- receiving a plurality of signals transmitted by a base station implementing a plurality of antennas configured for a multiple-input and multiple-output transmission;
determining, using a closed form singular value decomposition, one or more singular vectors;
aligning a phase of each of the one or more singular vectors to generate one or more aligned singular vectors;
averaging the aligned singular vectors to generate an average singular vector; and
providing, as feedback, the average singular vector to a precoder at the base station.
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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
16 Claims
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1. A method for use in a client station, the method comprising:
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receiving a plurality of signals transmitted by a base station implementing a plurality of antennas configured for a multiple-input and multiple-output transmission; determining, using a closed form singular value decomposition, one or more singular vectors; aligning a phase of each of the one or more singular vectors to generate one or more aligned singular vectors; averaging the aligned singular vectors to generate an average singular vector; and providing, as feedback, the average singular vector to a precoder at the base station. - View Dependent Claims (2, 3)
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4. A client station comprising:
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a radio interface configured to receive a plurality of signals transmitted by a base station implementing a plurality of antennas configured for a multiple-input and multiple-output transmission; and a channel estimator configured to determine, using a closed form singular value decomposition, one or more singular vectors; the channel estimator further configured to align a phase of each of the one or more singular vectors to generate one or more aligned singular vectors, and to average the aligned singular vectors to generate an average singular vector; wherein the radio interface is further configured to transmit, as feedback, the average singular vector to a precoder at the base station. - View Dependent Claims (5, 6)
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7. A method for use in a base station, the method comprising:
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receiving, at a base station, feedback comprising an average singular vector determined, at a client station, by using a closed form singular value decomposition to determine one or more singular vectors, aligning a phase of each of one or more singular vectors to generate one or more aligned singular vectors, and averaging the one or more aligned singular vectors; precoding a plurality of signals for multiple-input and multiple-output transmission based on the received average singular vector; and transmitting, as the multiple-input and multiple-output transmission, the precoded plurality of signals. - View Dependent Claims (8, 9, 10, 11)
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12. A base station comprising:
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a radio interface configured to receive feedback comprising an average singular vector determined, at a client station, by using a closed form singular value decomposition to determine one or more singular vectors, aligning a phase of each of one or more singular vectors to generate one or more aligned singular vectors, and averaging the aligned singular vectors; and a precoder configured to precode a plurality of signals for multiple-input and multiple-output transmission based on the received average singular vector; wherein the radio interface is further configured to transmit, as the multiple-input and multiple-output transmission, the precoded plurality of signals. - View Dependent Claims (13, 14, 15, 16)
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Specification