Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2008-05-06
2008-05-06
Payne, David C. (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C324S076330, C324S076350, C324S076540, C331S057000, C359S306000, C359S331000, C375S365000, C375S366000, C375S367000, C375S373000, C375S376000
Reexamination Certificate
active
10740766
ABSTRACT:
A communications apparatus and method use tapped delay lines as multiplexers and demultiplexers. In one embodiment, a receiver (100) uses a tapped delay line (110) as a demultiplexer to acquire a burst communication at very high data rates in the range of 2.5 to 80 Gbps with low preamble overhead. A sliding window correlator (114) continually samples the delay line (110) to determine when a PN encoded word is contained therein. The transmission frequency is pre-acquired before any data is present through the use of a ring oscillator frequency calibration loop (130) that is imbedded within the tapped delay line (110).
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Anderson James M.
Garber Edward M.
Upton Eric L.
DSouza Adolf
Jones Tullar & Cooper P.C.
Northrop Grumman Corporation
Payne David C.
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