Signal transmission apparatus and signal transmission method

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

Reexamination Certificate

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Details

C455S272000, C455S278100

Reexamination Certificate

active

07620420

ABSTRACT:
A signal transmission apparatus for transmitting a signal using multiple antenna elements comprises a transmission signal generator configured to convert at least one of a first signal addressed to an arbitrary mobile terminal belonging to a geographical area and a second signal addressed to a specific mobile terminal located in a part of the geographical area into one or more transmission signals to be transmitted using a prescribed beam pattern; a weighting adjustor configured to weight said one or more transmission signals for each of the antenna elements to define the prescribed beam pattern; and a signal synthesizer provided for each of the antenna elements and configured to synthesize the weighted transmission signals.

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patent: WO 2004/054153 (2004-06-01), None
Taisuke Ihara, et al., “Efficient Common Channel Transmission Employing Multi-Beam Antenns in W-CDMA Forward Link”, Communication Systems, ICCS, XP-010629259, vol. 1, Nov. 25, 2002, pp. 451-455.
A. Harada, et al., “Performance of Adaptive Antenna Array Diversity Transmitter for W-CDMA Forward Link”, Proc. PIMRC 99, Sep. 1999, pp. 1134-1138,.
Taisuke Ihara, et al., “ Efficient Common Channel Transmission Employing Multi-Beam Antenns in W-CDMA Forward Link”, ICCS 2002, pp. 5.

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