Pulse or digital communications – Transmitters
Reexamination Certificate
2005-03-08
2005-03-08
Bocure, Tesfaldet (Department: 2631)
Pulse or digital communications
Transmitters
C375S211000, C370S316000
Reexamination Certificate
active
06865238
ABSTRACT:
A satellite communications system provides an information channel between remotely located transmitters and receivers. A virtual satellite system provides the same service, but divides the signal either in power or in data content into subchannels such that any particular signal is conducted to the intended receiver via a plurality of traditional satellite channels. The receiving terminal accepts the plurality of signals simultaneously from a possible plurality of satellites, combining the subchannels comprising the virtual channel into the original signal content as if conducted via a single channel. The receiving antenna system receives satellite subchannel signals from a plurality of directions using multiple antennas or a single antenna with multi-direction capability. Prior to signal combining, the receiver necessarily time-synchronizes the plurality of subchannels by introducing time delay in some channels before combining the subsignals into the original composite. A timing signal present in the virtual satellite system assists the receiver in determining the amount of delay to apply to each incoming signal. The timing signal is either a separate carrier or an additional modulation on the existing information-bearing carrier.
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Bocure Tesfaldet
DLA Piper Rudnick
Gray Cary US LLP
Virtual Satellite Corporation
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