Multiplex communications – Wide area network – Packet switching
Patent
1983-05-13
1985-07-16
Orsino, Jr., Joseph A.
Multiplex communications
Wide area network
Packet switching
375 40, 375100, 455135, H04B 708
Patent
active
045300879
ABSTRACT:
A space diversity receiving system for the central station of a multi-direction time division multiplex communication network having a plurality of satellite stations, and one central station. Each satellite station transmits signals to the central station during an assigned time slot. The central station receives burst signals from the satellite stations. A first receiver has a main antenna. A second receiver has a supplementary antenna. Both receivers include a demodulator coupled to the corresponding antenna and a detector for detecting bit errors in the resulting demodulated signals, and for providing error pulses when appropriate. Each satellite station, needing space diversity, has a counter for competitively counting the error pulses from the receivers. A signal switcher responds to the demodulated signals and the counter for selecting a demodulated signal having a lower bit error rate.
REFERENCES:
patent: 3963988 (1976-06-01), Niethammer
patent: 4128809 (1978-12-01), Kage
Specification Sheet PB 74L5157C.
2GH.sub.Z Digital Radio Relay System CH1435 IEEE by Yamazaki, Hashimoto, Iwamoto, Yamamoto.
NEC Technical Reports, vol. 34, No. 10, 1981, pp. 67-75.
NEC Corporation
Orsino Jr. Joseph A.
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