Telecommunications – Transmitter and receiver at separate stations – Single message via plural modulation of single carrier
Patent
1990-06-27
1993-04-13
Kuntz, Curtis
Telecommunications
Transmitter and receiver at separate stations
Single message via plural modulation of single carrier
375 40, 455101, 455133, H04B 706, H04L 108
Patent
active
052030180
ABSTRACT:
Fixed radio equipment serving as a base station includes a transmitter, a plurality of antennas, and a selective control circuit. The antennas are spaced apart from each other by a distance which minimizes a correlation of interferential fading. The transmitter modulates a carrier by identical signals to be transmitted during periods associated in number with the antennas and feeds the resulting bursts of the carrier time-serially to a selective control circuit. The selective control circuit delivers one of the successive bursts of the carrier fed from the transmitter to one of the antennas and then delivers another burst following the above-mentioned burst to another one of the antennas. Mobile radio equipment or station has a single antenna for receiving the identical signals transmitted time-serially from the base station. The mobile station selects and outputs either one of the received signals which has higher quality than the other.
REFERENCES:
patent: 4383332 (1983-05-01), Glance et al.
patent: 4513412 (1985-04-01), Cox
patent: 4541095 (1985-09-01), Vries
patent: 4578819 (1986-03-01), Shimizu
patent: 4756023 (1988-07-01), Kojima
patent: 4766599 (1988-08-01), Miyazaki
patent: 4849990 (1989-07-01), Ikegami et al.
patent: 4926498 (1990-05-01), Suzuki et al.
Kuntz Curtis
OKI Electric Industry Co., Ltd.
Pham Chi H.
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