Radio telephone system and antenna device and base station for t

Details Radio telephone system and antenna device and base station for t Radio telephone system and antenna device and base station for t

1995-11-01

1997-07-15

Olms, Douglas W.

Multiplex communications

Duplex

Transmit/receive interaction control

370294, 359152, 455562, H04J 316, H04J 306

Patent

active

056489617

ABSTRACT:
A radio telephone system and an antenna device and a base station for the same which permit the expansion of a radio communication range and also further extension of the distance between the base station and an antenna. A single base station accommodates a plurality of antenna devices and the base station and the antenna devices are connected by optical fiber cables. Each of the antenna devices is equipped primarily with an optical-to-electrical converter, an electrical-to-optical converter, a distributor, frequency converters/amplifiers, local frequency oscillators, a control channel signal detector, a transmit/receive switcher, a controller, and antenna. The transmit/receive switching control is synchronized with the transmitting and receiving timings for send and receive signals transferred to and from the base station by using a slot number transmitted through a transmission control channel. The plurality of antenna devices connected to the single base station make it possible to expand the radio communication range to an arbitrary range in practical use; they also permit free selection of an area of radio communication range by connecting the base station with the antenna devices by optical fiber cables. In addition, the transmit/receive switching control of the antenna devices is carried out in accordance with the receiving timing of a slot number of a transmission control channel from the base station. This ensures accurate transmit/receive switching control.

REFERENCES:
patent: 5448570 (1995-09-01), Toda et al.
patent: 5481541 (1996-01-01), Gareh et al.
patent: 5528596 (1996-06-01), Fisher et al.

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