frequency modulation wikipedia - EAS

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    https://en.wikipedia.org/wiki/Frequency_modulation

    Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications, radio broadcasting, signal processing, and computing. In analog frequency modulation, such as radio broadcasting, of an audio … See more

    If the information to be transmitted (i.e., the baseband signal) is and the sinusoidal carrier is , where fc is the carrier's base frequency, and Ac is the carrier's amplitude, the modulator combines the carrier with the … See more

    FM provides improved signal-to-noise ratio (SNR), as compared for example with AM. Compared with an optimum AM scheme, FM typically has … See more

    Doppler effect
    When an echolocating bat approaches a target, its outgoing sounds return as echoes, which are … See more

    • Carlson, A. Bruce (2001). Communication Systems. Science/Engineering/Math (4th ed.). McGraw-Hill. ISBN 0-07-011127-8, ISBN 978-0-07-011127-1.
    • Frost, Gary L. (2010). Early FM Radio: Incremental technology in twentieth-century America. Baltimore, MD: … See more

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    Modulation
    FM signals can be generated using either direct or indirect frequency modulation:
    • Direct FM modulation can be achieved by directly feeding the message into the input of a voltage-controlled oscillator.
    • For indirect FM … See more

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  2. https://simple.wikipedia.org/wiki/Frequency_modulation

    WebIn telecommunications and signal processing, frequency modulation transmits information over a carrier wave by varying the frequency. This technique is different …

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    • https://en.wikipedia.org/wiki/Frequency_modulation_synthesis

      Frequency modulation synthesis (or FM synthesis) is a form of sound synthesis whereby the frequency of a waveform is changed by modulating its frequency with a modulator. The frequency of an oscillator is altered "in accordance with the amplitude of a modulating signal".
      FM synthesis can create both harmonic and inharmonic sounds. To synthesize …

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      • https://en.wikipedia.org/wiki/Frequency_modulation_encoding

        WebFrequency modulation encoding, or simply FM, is a method of storing data that saw widespread use in early floppy disk drives and hard disk drives. The data is modified …

      • https://en.wikipedia.org/wiki/Pulse-frequency_modulation

        WebPulse-frequency modulation ( PFM) is a modulation method for representing an analog signal using only two levels (1 and 0). It is analogous to pulse-width …

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        • https://en.wikipedia.org/wiki/Modified_frequency_modulation

          WebModified frequency modulation (MFM) is a run-length limited (RLL) line code used to encode data on most floppy disks and some hard disk drives. It was first introduced …

        • https://en.wikipedia.org/wiki/Modulation

          WebIn electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a separate signal

        • Frequency modulation - Wikipedia

          https://wiki.alquds.edu/?query=Frequency_modulation

          WebFrequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in …

        • https://en.wikipedia.org/wiki/Frequency-shift_keying

          WebFrequency-shift keying is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal. The …

        • https://en.wikipedia.org/wiki/Wobble_frequency

          WebDVD-R and DVD-RW have a constant wobble frequency of 140.6 kHz relying on data 'pits' beside the groove to convey information (Land pre-pit). [2] DVD+R and DVD+RW have a …

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