Telecommunications – Transmitter – Diversity
Reexamination Certificate
2006-05-02
2006-05-02
Gesesse, Tilahun (Department: 2684)
Telecommunications
Transmitter
Diversity
C455S562100, C455S133000
Reexamination Certificate
active
07039368
ABSTRACT:
A method controls the downlink beam in a radio communication system. The radio communication system has an antenna system with several antenna elements. The method involves a) examining a received uplink signal sent by a transmitter for the existence of phase correlations between parts of the uplink signal received from various antenna elements of the antenna system, and b) if a phase correlation is detected, assigning at least one source direction to the uplink signal and sending the downlink signal in the source direction. If a phase correlation is not detected, however, the downlink signal is sent in a non-directional manner in the form of several components produced using at least one diversity technique.
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Brunner Christopher
Seeger Alexander
Gesesse Tilahun
Siemens Aktiengesellschaft
Staas & Halsey , LLP
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