Difference between revisions of "Frequency modulation"
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| + | [[File:Radio transmission waves(AM and FM).gif|thumbnail|The Audio Signal (top) is transmitted on a carrier wave by modifying the [[amplitude]] (middle) or [[frequency]] (bottom)]] | ||
'''Frequency modulation''' (FM) is a signaling method that varies the carrier [[frequency]] in proportion to the [[amplitude]] of the modulating signal. | '''Frequency modulation''' (FM) is a signaling method that varies the carrier [[frequency]] in proportion to the [[amplitude]] of the modulating signal. | ||
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* [[Radio communication technologies]] | * [[Radio communication technologies]] | ||
| − | * '''[[Radio]]:''' | + | * '''[[Radio]]:''' [[Electromagnetic wave]], [[Frequency]], [[modulation]], [[amplitude]], [[amplitude modulation]] (AM), [[Shortwave]], [[Walkie-talkie]], [[Citizens band radio]], [[General Mobile Radio Service]] ([[GMRS]]), and [[Multi-Use Radio Service]] |
| − | * '''[[Amateur Radio]]:''' | + | * '''[[Amateur Radio]]:''' [[Selecting a radio]], and [[Telegraph]] |
| − | * '''[[Antenna (radio)]]:''' | + | * '''[[Antenna (radio)]]:''' [[Dipole antenna]], [[Homebrew antennas]], and [[Propagation]] |
| − | + | * '''Radio Standards Organization:''' [[FCC]], [[American Radio Relay League]] | |
| − | * '''Radio Standards Organization:''' | ||
* [[Satellite]]: [[GPS]] | * [[Satellite]]: [[GPS]] | ||
| − | * '''[[Cellular telephone]]:''' | + | * '''[[Cellular telephone]]:''' |
| − | ** [[Apple Computer|Apple]] [[iOS]] for [[iPhone]] | + | ** [[Apple Computer|Apple]] [[iOS]] for [[iPhone]] or [[iPad]] |
** [[Android (operating system)|Android]] | ** [[Android (operating system)|Android]] | ||
** [[BlackBerry OS|Blackberry]] | ** [[BlackBerry OS|Blackberry]] | ||
| − | ** [[Microsoft]] [[Windows | + | ** [[Microsoft]] [[Windows]] Phone with [[Windows 8]] |
** [[Cell phone health scare]], [[Mobile phones and brain tumor risk]] | ** [[Cell phone health scare]], [[Mobile phones and brain tumor risk]] | ||
| − | + | * [[Bug-out bag]] | |
| − | * [[Bug-out bag]] | ||
==Further Reading== | ==Further Reading== | ||
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[[Category:Telecommunications]] | [[Category:Telecommunications]] | ||
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[[Category:Electrical Engineering]] | [[Category:Electrical Engineering]] | ||
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[[Category:Radio]] | [[Category:Radio]] | ||
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Revision as of 21:56, April 14, 2016
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Frequency modulation (FM) is a signaling method that varies the carrier frequency in proportion to the amplitude of the modulating signal.
Frequency modulation is most commonly used in radio, amateur radio, radar, telemetry, seismic prospecting, and in the monitoring of newborns for seizures via EEG.[1]
See Also
- Radio: Electromagnetic wave, Frequency, modulation, amplitude, amplitude modulation (AM), Shortwave, Walkie-talkie, Citizens band radio, General Mobile Radio Service (GMRS), and Multi-Use Radio Service
- Antenna (radio): Dipole antenna, Homebrew antennas, and Propagation
- Radio Standards Organization: FCC, American Radio Relay League
Further Reading
- A. Bruce Carlson. Communication Systems, 4th edition. McGraw-Hill Science/Engineering/Math. 2001. ISBN 0-07-011127-8, ISBN 978-0-07-011127-1.
- Gary L. Frost. Early FM Radio: Incremental Technology in Twentieth-Century America. Baltimore: Johns Hopkins University Press, 2010. ISBN 0-8018-9440-9, ISBN 978-0-8018-9440-4.
- Ken Seymour, AT&T Wireless (Mobility). Frequency Modulation, The Electronics Handbook, pp 1188-1200, 1st Edition, 1996. 2nd Edition, 2005 CRC Press, Inc., ISBN 0-8493-8345-5 (1st Edition).
External Links
References
- ↑ B. Boashash, editor, “Time-Frequency Signal Analysis and Processing – A Comprehensive Reference”, Elsevier Science, Oxford, 2003; ISBN 0-08-044335-4