Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-03-15
2008-12-30
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S140000, C375S130000, C380S258000, C380S259000, C380S206000, C713S161000, C713S168000
Reexamination Certificate
active
07471714
ABSTRACT:
In a random number sequence sharing apparatus, a reception unit receives a radio signal including a radio wave from a pre-designated radio star at a pre-designated observation time, a sending unit sends the received radio signal to another random number sequence sharing apparatus, an acceptance unit accepts a radio signal sent from the another sharing apparatus, an analysis unit separates the two radio signals into a plurality of independent components by independent component analysis, a selection unit selects two independent components temporally different by difference in time required for the radio wave to arrive at both sharing apparatuses from the radio star, a sampling unit averages the two selected independent components after adjusting the temporal difference and bit-samples the average, and an output unit outputs a sequence of the bit samples as a random number sequence to be shared.
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Lam Kenneth
Liu Shuwang
National Institute of Information and Communication Technology
Townsend and Townsend / and Crew LLP
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