Multiplex communications – Communication over free space – Combining or distributing information via time channels
Reexamination Certificate
2002-08-22
2009-08-11
Mattis, Jason E (Department: 2416)
Multiplex communications
Communication over free space
Combining or distributing information via time channels
C370S509000
Reexamination Certificate
active
07573864
ABSTRACT:
In a communications or jamming system, accurate timing of the transmission of digitally processed signals is accomplished through the use of standard off-the-shelf components. In order to eliminate the need for high-cost, difficult to develop, specific digital hardware or realtime synchronous software not available from the standard off-the-shelf components, the output from the non-real time components is coupled to a realtime interface that assures nanosecond timing accuracy regardless of timing errors introduced by the off-the-shelf components. In one embodiment, the signals to be transmitted are digitized and then packetized, with the data to be transmitted reconstructed using non-real time digital processing. In order to establish the exact time for transmission, the packet is given a time stamp in the form of a header which indicates the exact time at which the packet is to be transmitted by the communications system, with the packet with header being transmitted to a storage buffer, the output of which is coupled to a realtime interface including a precise time output gate, the timing of which is controlled by a precision time reference having nano-second accuracy.
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Boland Robert P.
Luthi Peter O.
Simonson Peter
Thiele Matthew J.
BAE Systems Information and Electronic Systems Integration Inc.
Mattis Jason E
Tendler Robert K.
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