Instantaneous frequency measurement system
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorWilbur G. James
Life of this patent
Estimating the term…
Abstract
An improved instantaneous frequency measurement system which can measure se signals of differing frequencies emitted simultaneously by a single source. A conventional instantaneous frequency measurement detector is preceded by a gating device and a dispersive delay line which cooperate to transform the simultaneous signals into time sequential signals.
Claims9
Apparatus for measuring the frequencies of a plurality of simultaneously received pulse signals, comprising:
- sampling means having an input connected to receive said plurality of simultaneously received pulse signals for sampling a portion substantially less than one pulse of each of said input signals,
- phase shifting means connected to receive said sampled signals from said sampling means for producing output signals each shifted in phase by an amount related to the magnitude of its corresponding frequency, and
- instantaneous frequency measurement means connected to receive said output signals from said phase shifting means for producing an output signal having a measurement of the frequency of each of said plurality of simultaneously received pulse signals encoded therein.
In an instantaneous frequency measurement system adapted for receiving pulse signals, the improvement, whereby a plurality of pulse signals of unequal frequency may be simultaneously received and measured, comprising:
- sampling means connected to receive said plurality of signals for producing therefrom sampled signals being substantially less than one pulse of each of said plurality of signals, and
- phase shifting means connected to receive said sampled signals from said sampling means for producing output signals representing output signals from said sampling means shifted in phase by an amount related to their frequency with said output signals from said pulse shifting means being connected to the input of said instantaneous frequency measurement system.
Dependencies are inferred from the claim text.