amplitude modulation


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Related to amplitude modulation: phase modulation, frequency modulation

amplitude modulation

n. Abbr. AM
1. The encoding of a carrier wave by varying its amplitude in accordance with an input signal.
2. A broadcast system that uses amplitude modulation.
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.

amplitude modulation

n
1. (Telecommunications) one of the principal methods of transmitting audio, visual, or other types of information using radio waves, the relevant signal being superimposed onto a radio-frequency carrier wave. The frequency of the carrier wave remains unchanged but its amplitude is varied in accordance with the amplitude of the input signal. Abbreviation: AM or am Compare frequency modulation
2. (Telecommunications) a wave that has undergone this process
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

am

(æm; unstressed əm, m)

v.
1st pers. sing. pres. indic. of be.
[before 900; Old English am, eam, eom]

AM

1. Asian male.
2. amplitude modulation: a method of impressing a signal on a radio carrier wave by varying its amplitude.
3. a system of broadcasting using this method.
Compare FM.
[1935–40]

Am


Chem. Symbol.
americium.

Am.

1. America.
2. American.

A.M.

Master of Arts.
[< Latin Artium Magister]

a.m.

or A.M.,

1. before noon.
2. the period from midnight to noon, esp. the period of daylight prior to noon.
Compare p.m.
[1755–65; < Latin ante merīdiem]
usage: The abbreviation a.m. refers to the period from midnight until noon. One minute before noon is 11:59 a.m. One minute after noon is 12:01 p.m. Many people distinguish between noon and midnight by saying 12 noon and 12 midnight. Expressions such as 6 a.m. in the morning and 9 p.m. at night are redundant.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

amplitude modulation

A method of radio broadcasting in which the amplitude of the wave that carries the sound signal changes to reflect the various sounds that are to be reproduced, while the frequency of the wave remains the same. Compare frequency 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.amplitude modulation - modulation of the amplitude of the (radio) carrier waveamplitude modulation - modulation of the amplitude of the (radio) carrier wave
AM
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.
Translations
AMAmplitudenmodulation
modulation d'amplitude
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References in periodicals archive ?
*pulse amplitude modulation (PAM); non-return to zero (NRZ)
Keysight Technologies, Kandou Bus Collaborate to Advance Chord Signaling Technology for High-Speed Digital Applications
The amplitude modulation component m (t) can be written as:
Demystifying Power Supply Modulation Ratio: How Does PSMR Differ from PSRR? A SYSTEMATIC APPROACH QUANTIFIES THE IMPACT OF POWER SUPPLY NOISE VOLTAGE LEVELS ON PHASE NOISE
Quadrature amplitude modulation has a major application in various digital radio communications and data communications.
PERFORMANCE ANALYSIS OF 128-QAM DUAL POLARIZATION SYSTEM FOR LONG HAUL OPTICAL COMMUNICATION
The second one was chosen due to the fact that it is an analytically derived solution for a damped sinusoid [6], and a damped sinusoid could be modeled with good accuracy by amplitude modulation [9]--it will be called RVCI (Rife-Vincent Class I).
On the Impact of Amplitude Variation on Interpolated DFT Method and How to Reduce It
Uplink carrier aggregation with two carriers is expected to double peak upload data speeds to 102Mbps and downlink 256 Quadrature Amplitude Modulation (QAM) support will supposedly boost subscribers' download peak performance by more than 30%.
Nokia expands Flexi Zone small cell portfolio
The amplitude modulation term [m.sub.a] and the frequency modulation term [m.sub.f] can be described as [16-17]:
A Comparative Study of Harmonic Distortion in Multicarrier Based PWM Switching Techniques for Cascaded H-Bridge Inverters
"The same basic principle applies to amplitude modulation [AM] radio, where modulation of a high-frequency carrier wave communicates information about low-frequency speech patterns," he explained.
Turbulence physics can design a quieter plane: the exceptionally powerful and reverberating sounds of a jet during take-off prove that the noise produced by jet engines is ranked among the loudest of human-generated noises. Now, new turbulence physics from the University of Minnesota explains why jet noise is so loud
Even tremor, vibrato, and register are first defined perceptually before they are cast into production terminology like amplitude modulation, frequency modulation, or spectral tilt.
Vocology and audiology: natural partners for exploring the voice
It requests "robust protection for existing wind farm neighbours against the effects of turbine noise - specifically against Excessive Amplitude Modulation (EAM).
'Decades of deception' on wind farm noise
Their main focus is on digital communications bit error rate (BER) performance in additive white Gaussian noise (AWGN), which they consider in terms of binary, quaternary, binary, and multi-phase shift keying; quadrature amplitude modulation; frequency shift-keying; minimum-shift keying; space-time block coding; and other contexts.
Modeling of Digital Communication Systems Using Simulink
Gordon's lab has pioneered the use of paired nanoscale apertures to trap such samples optically; the amplitude modulation between two lasers of different frequencies effectively creates very fine tweezers for holding small particles.
EAR spectroscopy assesses proteins' good vibrations
The shape of the grating response suggests that the tuning bandwidth could be used for amplitude modulation (AM) applications or band-pass filters.
Tunable Amplitude and Phase Modulation in Terahertz Regime Using Transverse Stratified Configuration

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