Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate
2011-08-23
2011-08-23
Homayounmehr, Farid (Department: 2434)
Cryptography
Communication system using cryptography
Symmetric key cryptography
Reexamination Certificate
active
08005221
ABSTRACT:
A method is provided for coherently demodulating a chaotic sequence spread spectrum signal at a receiver (104). The method includes receiving a chaotic sequence spread spectrum signal including a plurality of information symbols. The method also includes generating a first string of discrete time chaotic samples. The first string of discrete time chaotic samples is identical to a second string of discrete time chaotic samples generated at a transmitter. The method further includes processing the chaotic sequence spread spectrum signal at the receiver to identify a time offset and a frequency offset relative to the first string of discrete time chaotic samples. Each of the discrete time chaotic samples of the first string of discrete time chaotic samples has a shorter sample time interval than the duration of the information symbols.
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Chester David B.
Michaels Alan J.
Fox Rothschild LLP
Harris Corporation
Homayounmehr Farid
Sacco Robert J.
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