Digital FM modulator

Details Digital FM modulator Digital FM modulator

2011-07-26

2011-07-26

Chang, Joseph (Department: 2817)

Modulators

Frequency modulator

Plural modulation

C332S100000, C332S117000, C332S120000, C455S042000, C455S110000

Reexamination Certificate

active

07986195

ABSTRACT:
Provided are apparatuses and methods for digital FM modulation. In one example, a message signal is integrated by an integrator to transform the message signal into a complex signal. The complex signal may include at least two complex components that may interfere to produce an FM modulated carrier signal. Hence, in this example, the method and apparatus for digital FM modulation may produce an FM modulated carrier signal without phase shifting. In another example, a lookup table is not necessary for modulation of the carrier signal.

REFERENCES:
patent: 5091705 (1992-02-01), Hiramatsu et al.
patent: 5121412 (1992-06-01), Borth
patent: 5905413 (1999-05-01), Yoshida et al.

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