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AssigneeParkerVision, Inc.
InventorsDavid F. Sorrells, Michael J. Bultman, Robert W. Cook, Richard C. Looke, Charley D. Moses, Jr.
Estimating the term…
Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal are described herein. Briefly stated, such methods, systems, and apparatuses operate by receiving an EM signal and an aliasing signal having an aliasing rate. The EM signal is aliased according to the aliasing signal to down-convert the EM signal. The term aliasing, as used herein, refers to both down-converting an EM signal by under-sampling the EM signal at an aliasing rate, and down-converting an EM signal by transferring energy from the EM signal at the aliasing rate. In an embodiment, the EM signal is down-converted to an intermediate frequency (IF) signal. In another embodiment, the EM signal is down-converted to a demodulated baseband information signal. In another embodiment, the EM signal is a frequency modulated (FM) signal, which is down-converted to a non-FM signal, such as a phase modulated (PM) signal or an amplitude modulated (AM) signal.
A method for down-converting a carrier signal to a lower frequency signal, comprising the steps of:
An apparatus for down-converting a carrier signal to a lower frequency signal, comprising:
The apparatus according to claim 136, wherein said energy transfer signal generator generates the pulses with non-negligible apertures equal in duration to at least one tenth of one percent of approximate half cycles of the carrier signal.
Dependencies are inferred from the claim text.