Telecommunications – Transmitter and receiver at separate stations
Patent
1994-06-03
1995-10-03
Urban, Edward F.
Telecommunications
Transmitter and receiver at separate stations
455 521, 455 561, 375202, H04Q 722
Patent
active
054559626
ABSTRACT:
A cellular communication system (50) is offered wherein communicated signals are exchanged on an indexed uplink communication resource and a non-indexed downlink communication resource. The non-indexed downlink communication format allows communication units to identify proximate service providers without knowledge of the index algorithm. The indexed signal transmitted by a user communication unit improves noise immunity in a signal transceived on the uplink. Signal quality is improved on the downlink through the use of selectable diversity antennas (22 or 23).
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patent: 5042082 (1991-08-01), Dahlin
patent: 5095535 (1992-03-01), Freeburg
Yasushi Yamao & Yoshinori Nagao; Predictive Antenna Selection Diversity (PASD) for TDMA; IEEE Int'l Conf. on Comm. 1991, 46.4.1 pp. 1480-1484.
Yoshihiko Akaiwa, Antenna Selection Diversity for Framed Digital Signal Transmission in Mobile Radio; IEEE Vehicular Tech. Conf. 1981, vol. 2, pp. 470-473.
Daniel R. Tayloe, Space Diversity Hopper for Digital Data Transmission, Motorola Technical Developments, Mar. 1990, vol. 10, pp. 62-63.
Motorola Inc.
Sobutka Philip J.
Sonnentag Richard
Urban Edward F.
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