frequency modulation

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Related to frequency modulation: phase modulation, amplitude modulation

frequency modulation

n. Abbr. FM
The encoding of a carrier wave by variation of its frequency in accordance with an input signal.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

frequency modulation

(Telecommunications) a method of transmitting information using a radio-frequency carrier wave. The frequency of the carrier wave is varied in accordance with the amplitude and polarity of the input signal, the amplitude of the carrier remaining unchanged. Abbreviation: FM Compare amplitude modulation
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


1. frequency modulation: a method of impressing a signal on a radio carrier wave by varying the frequency of the carrier wave.
2. a system of radio broadcasting by means of frequency modulation.
Compare AM.


Chem. Symbol. fermium.


1. fathom.
2. from.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

frequency modulation

A method of radio broadcasting in which the frequency of the wave that carries the sound signal changes to reflect the various sounds that are to be reproduced, while the amplitude of the wave remains the same. Frequency modulation reduces static in radio transmission. Compare amplitude modulation.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.frequency modulation - modulation of the frequency of the (radio) carrier wavefrequency modulation - modulation of the frequency of the (radio) carrier wave
modulation - (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

frequency modulation

nmodulazione f di frequenza
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
The set and reset signals for the self-triggering frequency modulation are obtained from the feedback-loop amplifier and sensing circuit.
The higher flame sensitivity to the lower frequency modulation could be the result of the higher amplitude equivalence ratio oscillations.
The frequency modulation index ([m.sub.f]) is as follows
The proposed AM-FM radar module combines amplitude modulation (AM) and frequency modulation (FM) based radars with an active reflector.
[25] presented the thought of stage wise matching pursuit and then proposed the line frequency modulation wavelet path tracking method.
In addition, integrated connectivity capabilities support FM (frequency modulation) radio, and location-based services with GNSS (global navigation satellite system) solutions.
Samsung also notes that the Exynos 7570 has entered mass production, and is the first Exynos processor to fully integrate Cat.4 LTE 2CA modem and connectivity solutions such as Wi-Fi, Bluetooth, Frequency Modulation (FM) and Global Navigation Satellite System (GNSS) in one chip.
In 2013, however, it halted operation due to high fuel costs, lack of spare parts and was turn into a frequency modulation (FM) broadcasting radio reaching a 5-kilometer radius.
With the linear frequency modulation pulse technology and matched filtering the digital signal processing technology is applied to a large number of the advanced technologies such as, the side scan sonar system to obtain a longer distance of the sweeping survey, at the same time also has a higher resolution, make the side scan sonar performance produced the qualitative leap (Aliabadi, 2014; Borodina, 2012).
SGS Life Science Services has installed and validated instrumentation which uses frequency modulation spectroscopy (FMS) for headspace oxygen analysis of biopharmaceutical container closure systems, as well as imaged capillary isoelectric focusing (icIEF) for analysis of charge distribution and heterogeneity in biopharmaceuticals, at its facility in Mississauga, Canada.
There is a linear frequency modulation of the signal that chirps the carrier frequency from 300 MHz at the start of the RF pulse envelope to 900 MHz at the end of the pulse envelope.

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