Method, apparatus and system for use in the transmission of...

Details Method, apparatus and system for use in the transmission of... Method, apparatus and system for use in the transmission of...

2003-12-23

2008-11-25

Pan, Yuwen (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

With control signal

C455S561000, C455S562100, C455S067110

Reexamination Certificate

active

07457590

ABSTRACT:
A method, apparatus and system are provided for use in optimizing signal-to-noise ratios at remote wireless devices. A method can receive a signal over a reverse link, determine an angular power profile of the reverse link signal, and determine an antenna weighting vector for the forward traffic signal based on the angular power profile. The determination of the weighting vector can include retrieving the vector from a weighting vector table. Some methods identify boundaries of angular spreads and utilize pre-calculate weighting vectors according to the boundaries. An apparatus can include an antenna array, a wireless receiver that receives reverse link signals, a detector that detects an angular power profile of the signals, a controller that determines a weighting vector and applies the weighting vector to the antenna array when transmitting. Some embodiments are dependent on whether the forward link incorporates a common pilot or per-user pilot signal.

REFERENCES:
patent: 6453177 (2002-09-01), Wong et al.
patent: 6754473 (2004-06-01), Choi et al.
patent: 2004/0014501 (2004-01-01), Kuwahara et al.
C.D. Frank, MMSE Reception of DS-CDMA with Open-Loop Transmit Diversity, Mar. 2001, 3G Mobile Communication Technologies, 26-28.

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