Dual transmit-receive space diversity communication system

Details Dual transmit-receive space diversity communication system Dual transmit-receive space diversity communication system

1986-10-17

1987-12-01

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375100, 455 52, 455 69, H04L 106, H04B 704

Patent

active

047109440

ABSTRACT:
A transmit/receive space diversity system communicates between transmitter-receivers at two separate sites. Each site has at least two antennas. Each antenna at a first one of the sites transmits a pilot signal, at differing frequencies. At the second or other site, all the pilot signals are received by each antenna, and the pilot signals are evaluated to determine which pilot-signal-receiving antenna is part of the lowest loss path between the sites. A data source at the second site is routed to the identified antenna for transmission of data signals back to the first site. At the first site, the data signals are received by all the antennas, and the best of the received data signals is routed to utilization apparatus. A data signal from the first site is transmitted to the second site, at which it is received by the selected antenna.

REFERENCES:
patent: 3209260 (1965-09-01), Young, Jr.
patent: 3214691 (1965-10-01), Sproul et al.
patent: 3401340 (1968-09-01), Cronburg, Jr. et al.
patent: 3717814 (1973-02-01), Gans
patent: 4035728 (1977-07-01), Ishikawa et al.
patent: 4513412 (1985-04-01), Cox
patent: 4539710 (1985-09-01), Dinsmore
patent: 4564935 (1986-01-01), Kaplan
patent: 4593413 (1986-06-01), Ozaki
Article entitled "Space-Diversity Engineering", by A. Vigants, published at pp. 103-142, in The Bell System Technical Journal, vol. 54, No. 1, Jan. 1975.

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