Demodulation method

Details Demodulation method Demodulation method

2006-03-21

2006-03-21

Tse, Young T. (Department: 2637)

Pulse or digital communications

Synchronizers

C375S355000

Reexamination Certificate

active

07016442

ABSTRACT:
A demodulation method for establishing clock synchronization within a short period of time from a received signal modulated by π/4-shift QPSK modulation that contains a synchronization establishment signal whose change in amplitude periodically alternates between positive and negative, and for demodulating the received signal. The method includes establishing synchronization from the received signal based on the timing of changes in the positive
egative polarity of the change in amplitude of the synchronization establishment signal contained in the received signal, and demodulating the received signal.

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patent: 6069883 (2000-05-01), Ejzak et al.
patent: 6115411 (2000-09-01), van Driest

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