Multiplex communications – Communication over free space – Combining or distributing information via time channels
Patent
1994-03-14
1997-04-08
Olms, Douglas W.
Multiplex communications
Communication over free space
Combining or distributing information via time channels
370442, H04J 310
Patent
active
056195044
ABSTRACT:
Telecommunication systems such as PON-FITL-Systems are known having a TDMA frame structure and comprising a main station and a number of substations. The known systems can comprise apparatus for coarse ranging and for fine ranging. A Pseudo Noise Sequence based coarse ranging technique employs coarse ranging at a fixed position within the upstream multiframe reserved for ranging, preferably for fine ranging. By applying a low power Pseudo Noise Sequence for coarse ranging and sampling the range in the main station only within a fine ranging window the position of which is known to the main station, a more accurate coarse ranging is achieved. Within the fine ranging window normally no data are present, and thus the signal-to-interference ratio is an order of magnitude better than in the other part of the frame.
REFERENCES:
patent: 5321690 (1994-06-01), Sata
patent: 5331316 (1994-07-01), Mestdagh et al.
"Burst and Bit Synchronization Methods for Passive Optical Networks" C.A. Eldering et al, 4th Workshop on Optical Local Networks, IEEE, Sep. 24, 25, 1992 pp. 38-44.
"Survey of Synchronization Techniques for a TDMA Satellite-Switched System" IEEE Transactions on Communications, vol. COM-28, No. 8, Aug. 1980.
Snijders Wilfred A. M.
Van Grinsven Petrus A. M.
Eason Leroy
Olms Douglas W.
Ton Dang
U.S. Philips Corporation
LandOfFree
Telecommunication system and a main station for use in such a sy does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Telecommunication system and a main station for use in such a sy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telecommunication system and a main station for use in such a sy will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2401739