Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Reexamination Certificate
2000-05-19
2008-08-12
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
C375S143000
Reexamination Certificate
active
07412018
ABSTRACT:
In a wireless communication system which includes a synchronization signal generator which generates a synchronization sequence, an RF transmitter which transmits the synchronization signal, and one or more receiver that receives the signal, where the synchronization sequence employs M PN codes of the same length that are repeated in a pseudo-random fashion for N code periods. Each receiver incorporates M filters matched to the M PN codes whose outputs are post detection combined in a manner consistent with the pseudo-random code transmission sequence to provide signal detection and synchronization. In another aspect, the synchronization sequence employs M time-shifted versions of a PN code that are repeated in a pseudo-random fashion for N code periods and each receiver incorporates a filter matched to the unshifted PN code and whose output samples are post detection combined in a manner consistent with the pseudo-random code transmission sequence to provide signal detection and synchronization.
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Natali Francis D.
Ohlson John E.
Alcatel USA Sourcing L.P.
Bacon & Thomas PLLC
Ghebretinsae Temesghen
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