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Index of articles associated with the same name
differently in each modulation scheme. Amplitude modulation index Frequency modulation index Phase modulation index This set index article includes a list
Modulation_index
Electronic method of transmitting information with a carrier wave
carrier wave. Phase modulation is one of the two principal forms of angle modulation, together with frequency modulation. In phase modulation, the instantaneous
Phase_modulation
Electronic method of transmitting information with a carrier wave
mathematical understanding of frequency modulation in the frequency domain. As in other modulation systems, the modulation index indicates by how much the modulated
Frequency_modulation
Electronic method of transmitting information with a carrier wave
Amplitude modulation (AM) is a signal modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave
Amplitude_modulation
Form of sound synthesis
Frequency modulation synthesis (or FM synthesis) is a form of sound synthesis whereby the frequency of a waveform is changed by modulating its frequency
Frequency modulation synthesis
Frequency_modulation_synthesis
Type of continuous-phase frequency-shift keying
maximum modulating frequency. As a result, the modulation index m is 0.5. This is the smallest FSK modulation index that can be chosen such that the waveforms
Minimum-shift_keying
Aviation navigation system
frequency modulation. The amplitude modulated signal is transmitted from a separate omnidirectional antenna. The roles of amplitude and frequency modulation are
VHF_omnidirectional_range
Process of varying one or more properties of a periodic waveform
Signal modulation is the process of varying one or more properties of a periodic waveform in electronics and telecommunication for the purpose of transmitting
Signal_modulation
Signal transmitted for test purposes in TV transmitters
professional television receiver imitating no radio frequency case for modulation index measurements in analogue TV transmitters. The composite monochrome
Zero_reference_pulse
Data communications modulation protocol
maximum modulating frequency. As a result, the modulation index m is 0.5. This is the smallest FSK modulation index that can be chosen such that the waveforms
Frequency-shift_keying
Nonlinear optical effect of light-matter interaction
Self-phase modulation (SPM) is a nonlinear optical effect of light–matter interaction. An ultrashort pulse of light, when travelling in a medium, will
Self-phase_modulation
Process for reducing noise
high-frequency signal components may be emphasized to produce a more equal modulation index for a transmitted frequency spectrum, and therefore a better signal-to-noise
Emphasis_(telecommunications)
Ratio of the desired signal to the background noise
where W is the bandwidth and k a {\displaystyle k_{a}} is modulation index Output signal-to-noise ratio (of AM receiver) is given by ( S N R )
Signal-to-noise_ratio
Type of radar where a known stable frequency continuous wave radio energy is transmitted
f Δ f m {\displaystyle \mathrm {B} ={\frac {f_{\Delta }}{f_{m}}}} (modulation index) A time delay is introduced in transit between the radar and the reflector
Continuous-wave_radar
ISO standard
amplitude-shift keying with 10% or 100% modulation index. The data coding is: 1 out of 4 pulse-position modulation 2 bits are coded as the position of a
ISO/IEC_15693
Type of frequency modulation
FM-UWB is a modulation scheme using double FM: low-modulation index digital FSK followed by high-modulation index analog FM to create a constant envelope
FM-UWB
Electronic circuit
noise than a product detector If the signal is overmodulated (i.e. modulation index > 1), distortion will occur Most of these drawbacks are relatively
Envelope_detector
impacts the refractive index, the impact of the new refractive index on another wavelength is known as XPM. Cross-phase modulation can be used as a technique
Cross-phase_modulation
Measure of speech transmission quality
Speech transmission index (STI) is a measure of speech transmission quality. The absolute measurement of speech intelligibility is a complex science.
Speech_transmission_index
Radio communications concept
the dial frequency. Frequency modulation also generates sidebands, the bandwidth consumed depending on the modulation index - often requiring significantly
Sideband
Guidance system for a landing aircraft
operation is a concept known as the amplitude modulation index, a measure of how strongly the amplitude modulation is applied to the carrier frequency. In the
Instrument_landing_system
Tracking and communication system developed by NASA and JPL
must maintain linearity. The PM modulation index is small, so the signal resembled double sideband amplitude modulation (AM) except for the carrier phase
Unified_S-band
Consequences of not getting enough sleep
parahippocampal place area (PPA). It does not affect the attention modulation index of the PPA. With this information, researchers have concluded that
Effects of sleep deprivation on cognitive performance
Effects_of_sleep_deprivation_on_cognitive_performance
Object detection system using radio waves
from the returned signal and a portion of the transmitted signal. The modulation index riding on the receive signal is proportional to the time delay between
Radar
Streaming communications protocol
intake, the video is encoded and segmented to generate video fragments and index file. Encoder: codify video files in H.264 format and audio in AAC, MP3
HTTP_Live_Streaming
Characteristic of an optical system
primary importance. This derived function is commonly referred to as the modulation transfer function (MTF). The image on the right shows the optical transfer
Optical_transfer_function
Type of optical device
will see a modulation of its refractive index. The simplest kind of EOM consists of a crystal, such as lithium niobate, whose refractive index is a function
Electro-optic_modulator
Periodic rectangular waveform
Pulse Modulation Techniques". resources.system-analysis.cadence.com. Retrieved 8 April 2025. "RF Pulse Modulation: Types and Modulation Index Explained"
Pulse_wave
Property in optics
effect and causes phenomena such as self-focusing and self-phase modulation. If the index varies linearly with the field (a nontrivial linear coefficient
Refractive_index
(ARRL) – Ammeter – Ampere – Amplifier – Amplitude distortion – Amplitude modulation – Analog computer – Analog – Analog-to-digital converter – Analogue switch
Index_of_electronics_articles
Technology of power electronics
case is dubbed sinusoidal pulse-width modulation (SPWM).For this, the modulation index, or amplitude-modulation ratio, is defined as ma = vc/v∆ . The
Power_electronics
Line code used in early magnetic data storage
Modified frequency modulation (MFM) is a run-length limited (RLL) line code used to encode data on most floppy disks and some hard disk drives. It was
Modified_frequency_modulation
Set of electronic sound synthesis techniques
with another signal. The distortion can be controlled by means of a modulation index. The method known as phase distortion synthesis is similar to FM. Waveshaping
Distortion_synthesis
Tracking system using transceivers on ships
GMSK coded data should frequency modulate the VHF transmitter. The modulation index should be 0.5. The transmission bit rate is 9600 bit/s Ordinary VHF
Automatic identification system
Automatic_identification_system
Type of power inverter
These pulses are added in the SPWM. ZSI has two control freedoms: modulation index of the reference wave which is the ratio of amplitude of reference
Z-source_inverter
Fluctuations in the luminance of a light
frequencies. NOTE - Several alternative metrics such as Modulation Depth, Flicker Percentage or Flicker Index are being applied. None of these metrics are suitable
Flicker_(light)
Technique for measuring chemical composition of a gas
a harmonic of the modulation frequency. In FMS, the light is modulated at a much higher frequency but with a lower modulation index. As a result, a pair
Tunable diode laser absorption spectroscopy
Tunable_diode_laser_absorption_spectroscopy
Telecommunications standard for the wireless transmission of data through radio signals
allows the service of users in favorable RF conditions with very complex modulation techniques while also serving users in poor RF conditions with simpler
Evolution-Data_Optimized
Attempt to send messages to intelligent extraterrestrials
supplementary information. Additionally, the message had a very small modulation index overall, a condition not viewed as being optimal for interstellar communication
Active_SETI
ITU-T recommendation
G.711, Pulse code modulation (PCM) of voice frequencies, is a narrowband audio codec originally designed for use in telephony that provides toll-quality
G.711
Seyfert type 1 galaxy located in the constellation Andromeda
variability amplitude of 129.10° based on its ratio definition of the 4-day modulation index. "NED Search results for IERS B0125+487". NASA/IPAC Extragalactic Database
IERS_B0125+487
Audio codec
are now deprecated and replaced with StreamS Encoders from StreamS/Modulation Index with many more features, including support xHE-AAC/Unified Speech and
High-Efficiency Advanced Audio Coding
High-Efficiency_Advanced_Audio_Coding
transmission, the baseband signal modulates the amplitude of the carrier. The modulation index is negative, so higher video level yields lower carrier (RF) level
White_clipper
Type of device
modulator is a device which is used to modulate a beam of light; optical modulation is the activity of modulating beams of light in optical communication
Optical_modulator
Signal transmission technique
In signal processing, spatial modulation is a technique that enables modulation over space, across different antennas at a transmitter. Unlike multiple-input
Spatial_modulation
Device which diffracts light via sound waves
that change the index of refraction. Incoming light scatters (see Brillouin scattering) off the resulting periodic index modulation and interference
Acousto-optic_modulator
Swedish scientist (1887–1970)
the U.S. patent office in 1949, Johnson reported "...although the modulation index of 11 per cent is not great,...the useful output power is substantial
John_Bertrand_Johnson
High redshift blazar located in the constellation Cassiopeia
inverted spectrum detected at 6 and 2.8 centimeters (cm) since 1996 with modulation index increasing to 9.1% at 2.8 cm from 6.5% at 6 cm during long-term monitoring
S5_0212+73
Phenomenon whereby deviations from a periodic waveform are reinforced by nonlinearity
In the fields of nonlinear optics and fluid dynamics, modulational instability or sideband instability is a phenomenon whereby deviations from a periodic
Modulational_instability
Interferometric technique
reflected by a vibrating target is reflected into the laser cavity, causing a modulation both in amplitude and in frequency of the emitted optical beam. In this
Self-mixing_interferometry
Quasar in the constellation of Hydra
radio core is found, indicated to have variability with a measured modulation index of 1.9% at 843 MHz frequencies. "NED Search results for PKS 1158-248"
PKS_1151−348
circuital law Ampère's force law Ampère's law Amplidyne Amplifier Amplitude modulation Analog circuit Analog filter Analog signal processing Analog signal Analog-to-digital
Index of electrical engineering articles
Index_of_electrical_engineering_articles
IEEE standard for wireless networks
Modulation and coding schemes MCS index Modulation type Coding rate Data rate (Mbit/s) 20 MHz channels 40 MHz channels 80 MHz channels 160 MHz channels
Wi-Fi_7
Multi-user version of OFDM digital modulation
the popular orthogonal frequency-division multiplexing (OFDM) digital modulation scheme. Multiple access is achieved in OFDMA by assigning subsets of subcarriers
Orthogonal frequency-division multiple access
Orthogonal_frequency-division_multiple_access
This page provides an index of articles thought to be Internet or Web related topics. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z AARNet - Abilene
Index of Internet-related articles
Index_of_Internet-related_articles
Quasar in the constellation Centaurus
scintillating component. Given the results, PKS 1144−379 has a high modulation index in the range of 5–18% combined with the 1.2 day characteristic timescale
PKS_1144−379
Antisense oligonucleotide
Volanesorsen, sold under the brand name Waylivra, is a triglyceride-reducing drug. It is a second-generation 2'-O-methoxyethyl (2'-MOE) antisense therapeutic
Volanesorsen
Visual phenomenon
(observation). NOTE – Several alternative metrics such as modulation depth, flicker percentage or flicker index are being applied for specifying the stroboscopic
Stroboscopic_effect
Safety anti-skid braking system used on aerospace and land vehicles
of pressure modulation for big sports and touring bikes. Valve and Pump Systems: The main parts which are part of the pressure modulation system are solenoid
Anti-lock_braking_system
Material with a negative refractive index
Negative-index metamaterial or negative-index material (NIM) is a metamaterial whose refractive index for an electromagnetic wave has a negative value
Negative-index_metamaterial
Thai rice variety
Ratchaniwan; Jantasuriyarat, Chatchawan; Thamchaipenet, Arinthip (2019-02-04). "Modulation of salt tolerance in Thai jasmine rice (Oryza sativa L. cv. KDML105) by
Jasmine_rice
Time signal transmitter in Russia
the UTC second, one bit is transmitted: 100 Hz modulation encodes a binary 0, while 312.5 Hz modulation encodes a binary 1. Each UTC second consists of
RBU_(radio_station)
Quasar in the constellation of Lynx
beginning in 1997 and ending at the end of the monitoring period. The modulation index of the quasar was observed rising 18% at various wavelengths before
OJ_508
Ascending or descending sequence of musical tones
music of this period introduces modulation, which involves systematic changes from one scale to another. Modulation occurs in relatively conventionalized
Scale_(music)
Type of wireless local area network based on IEEE 802.11
MCS index Modulation type Coding rate Phy rate (Mbit/s) Sensitivity power (dBm) Tx EVM (dB) 0 (Control-PHY) DSSS with 32 π⁄2-BPSK chips per bit 1/2 27
WiGig
Optical microscopy technique
containers in cell biology, DIC microscopy is increasingly replaced by Hoffman modulation contrast microscopy, invented by Robert Hoffman in 1975. Traditional phase-contrast
Phase-contrast_microscopy
voce Method (music) Method ringing Metre (hymn) Metre (music) Metric modulation Metronome Mezzo-soprano Micropolyphony Microsound Microtonal music Middle
Index_of_music_articles
Transmission of information electromagnetically
several different modulation schemes available to achieve this [two of the most basic being amplitude modulation (AM) and frequency modulation (FM)]. An example
Telecommunications
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Index_of_physics_articles_(S)
Form of bodybuilding circuit training
modulation. Low-frequency oscillation estimated from systolic blood pressure variability seems to be a suitable index of the sympathetic modulation of
PHA_training
theory Alfvén wave Alpha waves Amphidromic point Amplitude Amplitude modulation Animal echolocation Antarctic Circumpolar Wave Antiphase Aquamarine Power
Index_of_wave_articles
Data format used for audio compact discs
also dubbed "Redbook audio" in some contexts. CDDA utilizes pulse-code modulation (PCM) and uses a 44,100 Hz sampling frequency and 16-bit resolution, and
Compact_Disc_Digital_Audio
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State of drowsiness or lassitude following a meal
this behavior, such as decreased blood flow to the brain, neurohormonal modulation of sleep through digestive coupled signaling, or vagal stimulation, very
Postprandial_somnolence
Change in refractive index of a material in response to an applied electric field
variations in refractive index via the AC Kerr effect. The optical Kerr effect manifests itself temporally as self-phase modulation, a self-induced phase-
Kerr_effect
function – Programming language – Prolog – PSPACE-complete – Pulse-code modulation (PCM) – Pushdown automaton – Python QuarkXPress – QuickTime – QWERTY R
Index_of_computing_articles
Analogue mode for transmitting monochrome images
is transmitted in single sideband which is a refinement of amplitude modulation. The signal shifts up or down a given amount to designate white or black
Radiofax
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Analog videocassette recording format
under" chroma (color) signal that is encoded using quadrature amplitude modulation. Including side bands, the signal on a VHS tape can use up to 10 MHz of
VHS
Change in optical absorption by a semiconductor when an electric field is applied
the theoretical background of Franz–Keldysh effect and third-derivative modulation spectroscopy. H = 1 2 m ( p + e A ) 2 + V ( r ) {\displaystyle H={1 \over
Franz–Keldysh_effect
Division of the autonomic nervous system
primarily reflects parasympathetic modulation of the sinoatrial node and is therefore widely used as a non-invasive index of cardiac vagal tone. Reduced HRV
Parasympathetic nervous system
Parasympathetic_nervous_system
Anti-diabetic and anti-obesity medication
phase III randomized, double-blind trial, 1,961 adults with a body mass index of 30 or greater were assigned in a 2:1 ratio to a treatment with once-weekly
Semaglutide
Wireless networking standard in the 802.11 family
eight), downlink multi-user MIMO (up to four clients), and high-density modulation (up to 256-QAM). The Wi-Fi Alliance separated the introduction of 802
IEEE_802.11ac
Control loop feedback mechanism
systems and various other applications where constant control through modulation is necessary without human intervention. The PID controller automatically
PID_controller
that phase modulation and amplitude modulation can be achieved simultaneously, which are attributed to the giant refractive index modulation and the variable
Flat_lens
Musical tuning system
imperfect consonances. This allowed greater expression through enharmonic modulation, which became extremely important in the 18th century in music of such
Equal_temperament
Semiconductor light source
Rendering Index (CRI). Dimming: LEDs can be dimmed either by pulse-width modulation or lowering the forward current. This pulse-width modulation is why LED
Light-emitting_diode
Chronic multi-symptomatic pain disorder
biological mechanisms for exercise benefits in FM. Exercise may improve pain modulation through serotonergic pathways. It may reduce pain by altering the
Fibromyalgia
try to operate in the same band, or when their bands overlap. The two modulation methods used have different characteristics of band usage and therefore
List_of_WLAN_channels
Crystal type lacking 3D periodicity
_{3}c^{*}} . q {\displaystyle q} is modulation wave vector, which represents the direction and wavelength of the modulation wave through the crystal structure
Aperiodic_crystal
Cellular response to brain injury involving glial cells
cause astrocyte proliferation, and astrogliosis has long been used as an index for neuronal damage. Traditionally, astrogliosis has been defined as an
Gliosis
quality): This is quantified by various metrics, including encircled energy, modulation transfer function, Strehl ratio, ghost reflection control, and pupil performance
Optical_lens_design
Laser source with equal intervals of spectral lines
mechanisms exist for obtaining an optical frequency comb, including periodic modulation (in amplitude and/or phase) of a continuous-wave laser, four-wave mixing
Frequency_comb
light modulations. Two well-known examples of such unwanted effects are flicker and stroboscopic effect. Flicker is a directly visible light modulation at
Temporal_light_artefacts
Country in South America
The style often has a fast and happy rhythm, characterized by subtle modulations and full of syncopation and counterpoint. lambada and Carimbó achieved
Brazil
Neurodevelopmental disorder
catecholaminergic regulation of executive circuits: evidence for independent modulation of prefrontal functions by midbrain dopaminergic and noradrenergic neurons"
Attention deficit hyperactivity disorder
Attention_deficit_hyperactivity_disorder
American mathematician (1916–2001)
pad Product cipher Pulse-code modulation Rate distortion theory Sampling Shannon capacity Shannon entropy Shannon index Shannon multigraph Shannon security
Claude_Shannon
Variation in the time intervals between heartbeats
associated with the respiratory sinus arrhythmia (RSA), a vagally mediated modulation of heart rate (which increases during inspiration and decreases during
Heart_rate_variability
Sound frequency changes responsible for perceptions of loudness, pitch and timbre
with low spectral modulations and the anterior STG being tuned for temporally slow varying speech sounds with high spectral modulations. One unexpected
Temporal envelope and fine structure
Temporal_envelope_and_fine_structure
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