H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/005 (2006.01) H04B 7/185 (2006.01) H04B 7/212 (2006.01)
Patent
CA 2135859
A communication system (10) communicates real time data through a channel (26) that imposes delays of variable duration on signals propagating therethrough. The channel (26) may be established between a fast- moving satellite (14) in an orbit (28) around the earth and a subscriber unit (24) located proximate the earth' surface. The real time data are generated synchronously (124) at the subscriber unit (24) with a TDM frame (40) established by the satellite (14). The data are delayed in a variable delay circuit (68) before transmission through the channel (26). The duration of the delay imposed by the delay circuit (68) varies in response to timing data received from the satellite (14). The timing data describe a changing propagation delay for the channel (26) and changing definitions for TDM time slots (42', 44'). Data received at the subscriber unit (24) are delayed in another variable delay circuit (76). Both gradual and abrupt timing characteristics of the channel (26) are absorbed by the variable timing circuits (68, 76).
Gowling Lafleur Henderson Llp
Motorola Inc.
LandOfFree
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