A process whereby a signal is transformed from its original form into a signal that is more suitable for transmission over the medium between transmitter and receiver
The process of coding and decoding information for transmission For example, a voice conversation is coded into binary bits (digital information), transmitted and then decoded at the receiving end Back to the top
In electronics, a technique for impressing information (voice, music, picture, or data) on a radio-frequency carrier wave by varying one or more characteristics of the wave in accordance with the signal. There are various forms of modulation, each designed to alter a particular characteristic of the carrier wave. The most commonly altered characteristics include amplitude (see AM), frequency (see FM), phase, pulse sequence, and pulse duration. In music, the transition from one mode or key to another. There are three principal methods of modulation in classical harmony: diatonic, in which a pivot chord is common to both keys; chromatic, in which the notes of the pivot chord are altered by a semitone; and enharmonic, in which the notes of the pivot chord, while retaining their original tones, simply assume different names. Modulation may be transitory, as in the course of thematic development, or structural, contributing to the harmonic definition of the form
The process whereby some characteristic of one wave is varied in accordance with some characteristic of another wave The basic types of modulation are angle modulation (including the special cases of phase and frequency modulation) and amplitude modulation In missile radars, it is common practice to amplitude modulate the transmitted RF carrier wave of tracking and guidance transmitters by using a pulsed wave for modulating, and to frequency module the transmitted RF carrier wave of illuminator transmitters by using a sine wave
The process of varying the amplitude, frequency, or phase of an RF carrier wave The process whereby some characteristic of one wave is varied in accordance with some characteristic of another wave The basic types of modulation are angle modulation, including the special cases of phase modulation and frequency modulation, and amplitude modulation
The process of varying some characteristic (See Amplitude Modulation, Frequency Modulation or Phase Modulation) of the electrical carrier wave to impose information on it
When some characteristics of an electromagnetic wave are deliberately changed or manipulated for the purpose of transmitting information (see Amplitude Modulation, Frequency Modulation and Phase Modulation)
To superimpose the amplitude, frequency or phase of a wave or signal onto another wave or signal, which is then used to convey the original signal via a transmission medium (e g satellite link)
In music, one usually thinks of modulating as passing from one key to another--by means of intermediate chords In MIDI, modulation usually means applying a vibrato effect to a sound
the act of modifying or adjusting according to due measure and proportion (as with regard to artistic effect) (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase a manner of speaking in which the loudness or pitch or tone of the voice is modified
The methods of modulating or altering the carriers in order to carry the encoded information are quite varied They include amplitude modulation (AM)/ phase modulation (PM), frequency modulation (FM), frequency shift keyed (FSK), pulse position (PPM), pulse duration (PDM) and continuous wave (CW) In some cases, different modulating techniques are used in each direction (to and from the tags)
Variation of a characteristic of a wave, such as tide,, by the instantaneous values of another, modulating wave, eg a by a satellite constituent Amplitude and frequency modulation are the usual effects of such variations
Altering the characteristics of a carrier wave to convey information Modulation techniques include amplitude, frequency, phase, plus many other forms of digital encoding
Process by which the characteristics of electrical signals are transformed to represent information Types of modulation include AM, FM, and PAM See also AM, FM, and PAM
the addition of information to an electronic signal by changing the carrier; common modulation methods include amplitude modulation (AM), frequency modulation (FM) and phase modulation
The process of impressing information on a carrier wave by changing some of the wave's characteristics (such as amplitude, frequency, or phase) to reflect the changes in the information it delivers
anything which changes or modifies gating can cause "modulation" These can include ligand binding to the channel, post-translational modifications like phosphorylation, or changes in the process itself " Certain neurotransmitters such as GABA, serotonin, nitric oxide, and others can modulate ion channels indirectly by binding to other sites on cell membrane They do this by influencing GPCRs By changing the internal ion melieu of the cytoplasm, changes in the cell itself can take place Fatty acids have been shown to bind directly to ion channels and moduate them
Modulation refers to a carrier signal whose amplitude, frequency, or phase is modified according to one of the characteristics of an information signal
A change of key, whether transient, or until the music becomes established in the new key; a shifting of the tonality of a piece, so that the harmonies all center upon a new keynote or tonic; the art of transition out of the original key into one nearly related, and so on, it may be, by successive changes, into a key quite remote
The process in which the characteristics of one wave or signal are varied in accordance with another wave or signal Modulation can alter frequency, phase, or amplitude characteristics