Multiplex communications – Wide area network – Packet switching
Patent
1991-09-03
1993-01-05
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 953, 3701051, 3701054, 375108, 375116, 34082514, H04J 306
Patent
active
051777401
ABSTRACT:
Frame/slot synchronization is applied to a received Time Division Multiple Access (TDMA) signal and a temporal position of a reference feature is acquired, such as a synchronizing bit stream or preamble, associated with a desired time slot. The desired time slot is but one of a plurality of time slots that comprise a frame. Verification that the acquired temporal position corresponds to the desired time slot is performed by repetitively estimating a temporal position of the reference feature in a subsequent frame and sampling the subsequent frame at the estimated temporal position to determine if the reference feature is present. The temporal position of the reference feature of the desired time slot relative to the frame is maintained over a plurality of received frames.
REFERENCES:
patent: 4002845 (1977-01-01), Kaul et al.
patent: 4852090 (1989-07-01), Borth
patent: 4984249 (1991-01-01), Long et al.
patent: 5005190 (1991-04-01), Itoi
patent: 5016206 (1991-05-01), Shinonaga
"Design and Performance of Synchronization Techniques and Viterbi Adaptive Equalizers for Narrowband TDMA Mobile Radio", G. D'Aria and V. Zingarelli, Proceedings of Third Nordic Seminar on Digital Land Mobile Radio Communication, Copenhagen, Denmark, Sep. 13-15, 1988.
Chennakeshu Sandeep
Toy Raymond L.
Blum Russell
General Electric Company
Olms Douglas W.
Snyder Marvin
Zale Lawrence P.
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