Pilot signals for synchronization and/or channel estimation

Pulse or digital communications – Spread spectrum – Direct sequence

Reexamination Certificate

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Reexamination Certificate

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07317749

ABSTRACT:
The frame words of the preferred embodiment are especially suitable for frame synchronization and/or channel estimation. By adding the autocorrelation and cross-correlation functions of frame words, double maximum values equal in magnitude and opposite polarity at zero and middle shifts are obtained. This property can be used to slot-by-slot, double-check frame synchronization timing, single frame synchronization and/or channel estimation and allows reduction of the synchronization search time. Further, the present invention allows a simpler construction of a correlator circuit for a receiver.

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