TECHNIQUES FOR EXPLICIT FEEDBACK DELAY MEASUREMENT
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Abstract
Techniques for explicit feedback delay measurement are described. An apparatus may comprise a processor to generate a steering matrix for transmit spatial processing over a channel, determine a delay time associated with explicit feedback information for the channel, and determine whether to modify the steering matrix with the explicit feedback information based on the delay time. Other embodiments are described and claimed.
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Citations
46 Claims
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1-16. -16. (canceled)
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17. A wireless device, comprising:
circuitry to calculate a beamforming feedback matrix for a beamformer, the circuitry to determine a time delay between a feedback request sent to a beamformee and a feedback response received from the beamformee over a multi-carrier communications channel of a wireless local area network (WLAN), the feedback response to include information to calculate the beamforming feedback matrix for transmit beamforming, the circuitry to determine whether to use the information in the feedback response to calculate the beamforming feedback matrix based on the time delay. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A wireless device, comprising:
circuitry to generate a feedback response for a beamformee, the circuitry to advertise feedback request capabilities to a beamformer and receive a feedback request from the beamformer over a multi-carrier communications channel of a wireless local area network (WLAN), the circuitry to generate information to calculate a beamforming feedback matrix for transmit beamforming a data signal from the beamformer to the beamformee, the information to include a time when the feedback request arrived at the beamformee. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method, comprising:
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sending a feedback request over a wireless channel from a beamformer to a beamformee; receiving a feedback response from the beamformee by the beamformer, the feedback response including information to calculate a beamforming feedback matrix for transmit beamforming, the feedback response including a first timestamp of when the feedback request arrived at the beamformee; determining a second timestamp of when the feedback response arrived at the beamformer; calculating a time delay as the second timestamp minus the first timestamp; and determining whether to use the information in the feedback response to form or modify the beamforming feedback matrix for transmit beamforming a data signal from the beamformer to the beamformee based on the time delay. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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Specification