Method and system of local oscillator signal generation
AssigneeRaytheon Company
InventorsFrancis J. Morris, Premjeet Chahal
Life of this patent
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Abstract
Methods and apparatus for local oscillator generation are provided. In a method embodiment, a method of signal processing includes splitting a signal having a first frequency into at least a first portion and a second portion. The method also includes generating a second signal having a second frequency at a predetermined frequency difference from the first frequency by optically modulating the first portion. In addition, the method includes generating a third signal having a frequency component at a frequency that is approximately the same as the predetermined frequency difference from the first frequency by combining the second portion with the second signal.
Claims20
A method of signal processing, comprising:
- splitting a signal having a first frequency into at least a first portion and a second portion;
- vibrating a mirror at a second frequency, the second frequency at least an order of magnitude less than the first frequency;
- generating a local oscillator signal by impinging the first portion on the vibrating mirror;
- generating a converted frequency signal having a frequency component at approximately the second frequency by multiplying the second portion with the local oscillator signal;
- and
- receiving the converted frequency signal at a receiver tuned to approximately the second frequency.
A method of signal processing;
- splitting a signal having a first frequency into at least a first portion and a second portion;
- generating a second signal having a second frequency at a predetermined frequency difference from the first frequency by optically modulating the first portion;
- and
- generating a third signal having a frequency component at a frequency that is approximately the same as the predetermined frequency difference from the first frequency by combining the second portion with the second signal.
A signal processing system, comprising:
- a beam splitter operable to split a signal comprising a first frequency into at least a first portion and a second portion, the first portion radiated along a first signal path;
- a local oscillator operable to generate, by optically modulating the first portion, a second signal having a second frequency at a predetermined frequency difference from the first frequency;
- and
- a mixer operable to combine the second signal and the second portion to generate a third signal having a frequency component at approximately the same frequency as the predetermined difference from the first frequency.
Dependencies are inferred from the claim text.