Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal
Reexamination Certificate
2006-08-15
2006-08-15
Tran, Khai (Department: 2637)
Pulse or digital communications
Synchronizers
Frequency or phase control using synchronizing signal
C375S340000, C375S343000, C375S355000, C329S304000, C370S208000, C370S535000
Reexamination Certificate
active
07092469
ABSTRACT:
The invention is a method and demodulator which detects periodic synchronization signals. The method of the invention includes multiplexing orthogonal signals in a wireless transmission into a signal stream; applying the signal stream to a synchronization signal detector which produces an output signal including detection of a unique code representing the synchronization signals within the signal stream; demultiplexing the output signal into orthogonal signals; calculating a function of the demultiplexed orthogonal signals and combining the function of each of the orthogonal signals into a combined output signal; averaging the combined output signal over a time period during which the synchronization signals repeat to produce an averaged signal; detecting peaks in the averaged signal; and synchronizing a demodulator in response to the peaks which demodulates the wireless transmission.
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3rdGeneration Partnership Project; Technical Specification Group Services and System Aspects IP Multmedia (IM) Subsystem-Stage 2 (Release 5), 3GPP TS 23.228 v.5.0.0(Apr. 2001), pp. 1-126.
Alston & Bird LLP
Chang Edith
Nokia Corporation
Tran Khai
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