Title:
METHOD AND APPARATUS FOR CHANNEL DETERMINATION FOR TIME DIVISION DUPLEX SYSTEMS WITH COUPLED ANTENNAS
Document Type and Number:
WIPO Patent Application WO/2017/078957
Kind Code:
A8
Abstract:
A method and apparatus for channel determination for time division duplex systems with coupled antennas. A signal can be received at a receiving device (715). The signal can be based on a first product of an inverse of a transmit coupling matrix of a transmitting device and a receive coupling matrix of the transmitting device. A second product of a transmit coupling matrix of the receiving device and an inverse of a receive coupling matrix of the receiving device can be calculated (720). A receive channel from the transmitting device to the receiving device using reference symbols transmitted by the transmitting device can be measured at the receiving device (725). A reverse channel can be determined based on the signal and based on a third product of the second product and the transpose of the measurement of the receive channel (730). A precoded signal based on the reverse channel can be transmitted (750).
Inventors:
COLIN FRANK (US)
Application Number:
PCT/US2016/058488
Publication Date:
June 29, 2017
Filing Date:
October 24, 2016
Export Citation:
Assignee:
MOTOROLA MOBILITY LLC (US)
International Classes:
H04B7/04; H04B17/11
Attorney, Agent or Firm:
WATANABE, Hisashi David et al. (US)
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