Multiplex communications – Communication over free space – Combining or distributing information via code word channels...
Patent
1999-01-14
2000-02-29
Ton, Dang
Multiplex communications
Communication over free space
Combining or distributing information via code word channels...
370280, 375267, 375299, 455562, 455101, H04J 1304, H04J 300, H04B 7216
Patent
active
RE0365912
ABSTRACT:
In a base station which has a plurality of antennas, each of a plurality of comparison circuits operates to compare correlation levels, which are obtained by despreading received signals for a plurality of channels, with each other with respect to the antennas. Each of a plurality of transmission antenna selecting circuits operates to determine from which antenna a transmission signal is to be transmitted for every channel. Each of a plurality of multiplexing circuits operates to multiplex the transmission signals of the individual channels, which are spread, for every antenna. As a result, on the basis of the result of the comparison of the correlation levels with respect to the antennas, a transmission antenna is selected for every channel, and the signals of the channels that are to be transmitted by a given antenna are multiplexed, whereby the base station achieves transmission diversity.
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Hayashi Masaki
Kato Osamu
Miya Kazuyuki
Frank Robert J.
Matsushita Electric - Industrial Co., Ltd.
Ton Dang
Vincent David
Wood Allen
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