Method and apparatus for estimating downlink beamforming...

Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail

Reexamination Certificate

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C455S277200, C455S278100, C455S067110

Reexamination Certificate

active

06839574

ABSTRACT:
A downlink beamforming apparatus and method. In one embodiment, a method in accordance with the teachings of the present invention includes receiving uplink communication signals from a plurality of antenna array elements, selecting an operating condition of an environment and estimating downlink beamforming weights used in downlink communication signals in response to the selected operation condition of the environment.

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G. Xu and H. Lui, “An effective transmission beamforming scheme for frequency division duplex digital wireless communications systems”, inProc. of ICASSP, 1995, pp. 1729-1732.
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