Adaptive transmit beamforming for frequency division duplexing systems
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United States of America Patent
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Jan 3, 2017
Grant Date -
Oct 3, 2013
app pub date -
Mar 30, 2012
filing date -
Mar 30, 2012
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Abstract
Embodiments of a method and apparatus for performing an adaptive transmission scheme in a frequency division duplexing communication system based on channel state information estimated using an open-loop mode are described herein. In one example, the method includes estimating an impulse response of a channel using a signal received over a first frequency band of the channel from a device, transforming the impulse response into a frequency response of the channel, and subsequently performing the adaptive transmission scheme using the frequency response to transmit a signal to the device over a second frequency band of the channel that is different from the first frequency band.
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