UP-CONVERSION BASED ON GATED INFORMATION SIGNAL
First Claim
1. A system for modulating and up-converting an information signal, comprising:
- gating means for gating the information signal at a rate that is substantially equal to a desired sub-harmonic of a desired frequency of an output signal, thereby generating a gated information signal, said gated information signal having an amplitude that is a function of the information signal;
differentiating means for differentiating said gated information signal to generate a harmonically rich signal having a plurality of harmonics; and
selecting means for selecting at least one of said plurality of harmonics as a desired output signal, said desired output signal being at said desired frequency.
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Accused Products
Abstract
A method and system is described wherein an information signal is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In a first modulation embodiment, one information signal is phase modulated onto the carrier signal as part of the up-conversion process. In a second modulation embodiment, two information signals are multiplied, and, as part of the up-conversion process, one signal is phase modulated onto the carrier and the other signal is amplitude modulated onto the carrier. In a third modulation embodiment, one information signal is phase modulated onto the “I” phase of the carrier signal as part of the up-conversion process and a second information signal is phase modulated onto the “Q” phase of the carrier as part of the up-conversion process.
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Citations
1 Claim
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1. A system for modulating and up-converting an information signal, comprising:
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gating means for gating the information signal at a rate that is substantially equal to a desired sub-harmonic of a desired frequency of an output signal, thereby generating a gated information signal, said gated information signal having an amplitude that is a function of the information signal; differentiating means for differentiating said gated information signal to generate a harmonically rich signal having a plurality of harmonics; and selecting means for selecting at least one of said plurality of harmonics as a desired output signal, said desired output signal being at said desired frequency.
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Specification