Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-11-07
2006-11-07
Tran, Khanh (Department: 2611)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S343000
Reexamination Certificate
active
07133438
ABSTRACT:
Communications acquisition method for correlating an incoming binary-coded spread sequence having m bits and arriving at a frequency f with a locally generated spread sequence by phase-shifting a multiplicity of locally generated spread sequences with respect to the received spread sequence. The received spread sequence being correlated with a locally generated spread sequence at the frequency f. The received spread sequence is stored. The received, stored spread sequence is split into sections and the correlation is carried out in steps at an oversampling rate. A correlator includes a shift register with feedback. Register positions of the shift register are connected in parallel to a memory input, and the memory output is connected in parallel with the register positions. A further memory holds reference signal sequences and another comparator compares the memory content with further memory content.
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Frank Schrödter: “GPS-Satelliten-Navigation”, pp. 76-81.
Gunzelmann Bertram
Molev-Shteiman Arkadi
Ahn Sam K.
Greenberg Laurence A.
Infineon - Technologies AG
Locher Ralph E.
Stemer Werner H.
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