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US 5,291,200 AGranted
Method for measuring frequency modulation rate characteristics for a swept frequency signal
AssigneeAlliedSignal Inc.
InventorPei-hwa Lo
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Abstract
A method for characterizing frequency modulation rate parameters for a swept frequency signal is based on zero crossing counting and digital signal processing. The method is easy to implement and does not require batch processing so as to be suitable for real time tracking of frequency variations in a variety of applications.
Claims7
A method for measuring frequency modulation rate characteristics for a swept frequency signal, comprising:
- sampling the zero crossings of a frequency modulation rate signal;
- using the sampled zero crossings for initially estimating the sweeping characteristics of the frequency modulation rate signal;
- tracking the error of the estimate;
- updating the estimate if the error is beyond a predetermined threshold;
- and
- using the updated estimate for measuring the frequency modulation rate characteristics.
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Dependencies are inferred from the claim text.