Method and System for Down-Converting an Electromagnetic Signal, and Transforms for Same, and Aperture Relationships
First Claim
1. A method for down-converting an electromagnetic signal, comprising the steps of:
- (1) performing an RC processing operation on a portion of a carrier signal;
(2) accumulating the result of the RC processing operation of step (1); and
(3) repeating steps (1) and (2) for additional portions of the carrier signal, whereby the accumulation results form a down-converted signal.
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Abstract
Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for down-converting an electromagnetic (EM) signal are described herein. Briefly stated, in embodiments the invention operates by receiving an EM signal and recursively operating on approximate half cycles (½, 1½, 2½, etc.) of the carrier signal. The recursive operations can be performed at a sub-harmonic rate of the carrier signal. The invention accumulates the results of the recursive operations and uses the accumulated results to form a down-converted signal. 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 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.
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Citations
11 Claims
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1. A method for down-converting an electromagnetic signal, comprising the steps of:
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(1) performing an RC processing operation on a portion of a carrier signal; (2) accumulating the result of the RC processing operation of step (1); and (3) repeating steps (1) and (2) for additional portions of the carrier signal, whereby the accumulation results form a down-converted signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification