Method and system for synchronizing in a frequency shift...

Details Method and system for synchronizing in a frequency shift... Method and system for synchronizing in a frequency shift...

2007-04-10

2007-04-10

Deppe, Betsy L. (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S343000, C375S354000

Reexamination Certificate

active

10397027

ABSTRACT:
The invention provides a method and apparatus for achieving timing synchronization during signal acquisition and for achieving frequency synchronization in a digital communication receiver after signal acquisition. The invention operates by performing multiple correlations of a received signal, each correlation performed over an symbol interval and correlating the received signal in the symbol interval with a sinusoid of an expected frequency. The correlations are combined to determine a peak and energy, and if the peak to energy ratio is above a threshold, the symbol timing and frequency offset is estimated.

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