Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2008-01-29
2008-01-29
Bayard, Emmanuel (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
Reexamination Certificate
active
07324617
ABSTRACT:
A mobile device detects downlink transmit diversity. Slot and frame timing knowledge and a downlink scrambling code are applied to pilot and synch channels of the signal. An algorithm suited for the diversity case and an algorithm suited for the non-diversity case are utilized. The output of the diversity algorithm is compared to the output of the non-diversity algorithm. The output yielding the highest energy determines whether downlink transmit diversity is applied. The detection algorithms used in both the diversity and non-diversity cases use phasors to indicate the phase difference between two channels. This phase difference is the basis for determining diversity usage.
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Banerjee Debarag Narayan
Renucci Pascal Gilles
Toussi Karim Nassiri
Bayard Emmanuel
Hertzberg Brett A.
Merchant & Gould P,C,
National Semiconductor Corporation
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