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Frequency modulation

Frequency modulation (FM) is a signal modulation technique used in electronic communication, originally for transmitting messages with a radio wave. In frequency modulation a carrier wave is varied in its instantaneous frequency in proportion to a property, primarily the instantaneous amplitude, of a message signal, such as an audio signal.

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Overview

FM Signal

Sinusoidal baseband signal

Modulation index

Bessel functions

Carson's rule

Implementation

Applications

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Map overview Semantic statistics

Frequency modulation

Nodes128
Edges127
Triples78
Avg. degree1.98
Density0.015625
Components1

How this topic connects Entity context

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Frequency modulation

Top relations

related to Radio · 21
Frequency modulation → AM, American, Armstrong, As, BBC, Edwin Howard Armstrong, FM, Frequency, He, Institute, Method, New York, November, Radio Engineers, Radio Signaling, Reducing Disturbances, System, The, VHF, W2XMN
related to Further reading · 18
Frequency modulation → America, Baltimore, Bruce, Carlson, Communication Systems, CRC Press, Early FM Radio, Frost, Gary, Incremental, ISBN, Johns Hopkins University Press, Ken, McGraw-Hill, MD, Science/Engineering/Math, Seymour, The Electronics Handbook
related to Demodulation · 14
Frequency modulation → Alternatively, AM, FM, For, Foster, Hilbert, If, In, IQ, Many FM, Nyquist, Seeley, Slope, The
related to FM Signal · 9
Frequency modulation → According, FM, Frequency, Paul Nahin, Ron Bertrand, The FM, This, To, Without
related to Modulation · 5
Frequency modulation → Direct FM, FM, For, In, This
related to Doppler effect · 3
Frequency modulation → Doppler, In, Schnitzler
is a · 1
Frequency modulation → method of modulating a carrier wave whereby the modulating audio causes the instantaneous frequency of the carrier to change

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Important terminology

modulation frequency fm signal radio used carrier amplitude bandwidth modulating index deviation systems audio wave also displaystyle wideband using frequencies

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Frequency modulationis amethod of modulating a carrier wave whereby the modulating audio causes the instantaneous frequency of the carrier to change0.90text
Family Radio Serviceinstance ofis used for two-way radio systems0.80text
in which the carrier is allowed to deviate only 2.5 kHz aboveinstance ofis used for two-way radio systems0.80text
below the center frequency with speech signals of no more than 3.5 kHz bandwidthinstance ofis used for two-way radio systems0.80text
auditory processing disorder or ADHDinstance ofFM systems are used by hearing-impaired people as well as children whose listening is affected by disorders0.80text
cochlear implantsinstance ofFM systems are more convenient and cost-effective than alternatives0.80text
but many users use FM systems infrequently due to their conspicuousnessinstance ofFM systems are more convenient and cost-effective than alternatives0.80text
need for recharginginstance ofFM systems are more convenient and cost-effective than alternatives0.80text
Frequency modulationrelated to DemodulationMany FM0.60section
Frequency modulationrelated to DemodulationFoster0.60section
Frequency modulationrelated to DemodulationSeeley0.60section
Frequency modulationrelated to DemodulationFM0.60section

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