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Form of modulation
Pulse-density modulation (PDM) is a form of modulation used to represent an analog signal with a binary signal. In a PDM signal, specific amplitude values
Pulse-density_modulation
Form of signal modulation using time shifts
Pulse-position modulation (PPM) is a form of signal modulation in which M message bits are encoded by transmitting a single pulse in one of 2 M {\displaystyle
Pulse-position_modulation
Form of signal modulation
Pulse-amplitude modulation (PAM) is a form of signal modulation in which the message information is encoded in the amplitude of a pulse train interrupting
Pulse-amplitude_modulation
Representation of a signal as a rectangular wave with varying duty cycle
Pulse-width modulation (PWM), also known as pulse-duration modulation (PDM) or pulse-length modulation (PLM), is any method of representing a signal as
Pulse-width_modulation
Digital representation of sampled analog signals
Pulse-code modulation (PCM) is a method used to digitally represent analog signals. It is the standard form of digital audio in computers, compact discs
Pulse-code_modulation
Process of varying one or more properties of a periodic waveform
methods Pulse-amplitude modulation (PAM) Pulse-width modulation (PWM) and pulse-depth modulation (PDM) Pulse-frequency modulation (PFM) Pulse-position
Signal_modulation
Represents an analog signal using only two levels
between pulse trains. Pulse-amplitude modulation Pulse-code modulation Pulse-density modulation Pulse-position modulation Rate coding, pulse-frequency
Pulse-frequency_modulation
Audio amplifier based on switching
between the supply rails, using pulse-width modulation, pulse-density modulation, or related techniques to produce a pulse train output. A low-pass filter
Class-D_amplifier
Method for converting signals between digital and analog
into a pulse frequency, or pulse density, which can be understood as pulse-density modulation (PDM). A sequence of positive and negative pulses, representing
Delta-sigma_modulation
Periodic rectangular waveform
Other pulse modulation techniques include Pulse Frequency Modulation (PFM), where the frequency of the pulses is varied, and pulse-density modulation (PDM)
Pulse_wave
Modulation technique for LED power control
density approaches desired value. The pseudo-random pulses in the signal are visible. SSDM can be seen as a special case of Pulse-density modulation (PDM)
Stochastic Signal Density Modulation
Stochastic_Signal_Density_Modulation
Signal conversion technique
differential pulse-code modulation (DPCM) where the difference between successive samples is encoded into n-bit data streams. In delta modulation, the transmitted
Delta_modulation
System for digitally encoding audio signals
for the Super Audio CD (SACD). DSD uses delta-sigma modulation, a form of pulse-density modulation encoding, a technique to represent audio signals in
Direct_Stream_Digital
Classification of power amplifier
stream of pulses that represents the signal by pulse-width modulation, pulse-density modulation, delta-sigma modulation or a related modulation technique
Power_amplifier_classes
Signal processing technique
linear-frequency-modulation waveform. There are other means to modulate the signal. Phase modulation is a commonly used technique; in this case, the pulse is divided
Pulse_compression
Modulation technique for mitigating EMI of power converters
Random pulse-width modulation (RPWM) is a modulation technique introduced for mitigating electromagnetic interference (EMI) of power converters by spreading
Random_pulse-width_modulation
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
Digital optical disc data storage format
variation of this technique called pulse-density modulation (PDM), while Matsushita (now Panasonic) chose pulse-width modulation (PWM), advertising it as MASH
Compact_disc
Read-only optical disc for high-fidelity audio storage
SACD audio is stored in Direct Stream Digital (DSD) format using pulse-density modulation (PDM), where audio amplitude is determined by the varying proportion
Super_Audio_CD
Time of day voice service
constructed based on cinematic techniques and consists of discs with pulse-density modulation optical marks on photographic tapes, photocell with actuator, and
Speaking_clock
Type of wave pulse
different pulse shapes, the minimum duration-bandwidth product is different. The duration-bandwidth product is minimal for zero phase-modulation. For example
Bandwidth-limited_pulse
Pattern used within a communications system to represent digital data
frequency modulation, Miller encoding and delay encoding Non-return-to-zero (NRZ) Non-return-to-zero, inverted (NRZI) Pulse-position modulation (PPM) Return-to-zero
Line_code
Type of radar system
difference, or phase shift, from pulse to pulse. This causes the reflector to produce Doppler modulation on the reflected signal. Pulse-Doppler radars exploit this
Pulse-Doppler_radar
Data format used for audio compact discs
is 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
Compact_Disc_Digital_Audio
List of computer file compression formats
as raw audio format, although not technically necessary. FFmpeg Pulse-density modulation (PDM) Direct Stream Digital (DSD) is standard for Super Audio CD
List_of_codecs
Method in nonlinear control theory
sliding-mode control) Pulse-density modulation – A generalized form of delta-sigma modulation. Pulse-width modulation – Another modulation scheme that produces
Sliding_mode_control
Test and measurement instrument
APx500 Series analyzers support AES/EBU, S/PDIF, I²S, HDMI, PDM (Pulse Density Modulation), and Bluetooth radio, and are fully DSP based. A modern audio
Audio_analyzer
Object detection system using radio waves
developed a breadboard test unit, operating at 50 cm (600 MHz) and using pulsed modulation which gave successful laboratory results. In January 1931, a writeup
Radar
Topics referred to by the same term
module, decision making about routing table entries Pulse-density modulation, a form of modulation used in analog to digital conversions Product Data Management
PDM
Radio modulation design
Binary offset carrier modulation (BOC modulation) was developed by John Betz in order to allow interoperability of satellite navigation systems. It is
Binary offset carrier modulation
Binary_offset_carrier_modulation
Type of continuous-phase frequency-shift keying
In digital modulation, minimum-shift keying (MSK) is a type of continuous-phase frequency-shift keying that was developed in the late 1950s by Collins
Minimum-shift_keying
Optical transceiver that uses coherent modulation
can fall back to older, simpler modulation techniques such as on-off keying (NRZ) and/or Pulse-amplitude modulation with 4 levels (PAM-4) when appropriate
Coherent_optical_module
Effect of a material on light
signals along transmission lines (such as microwaves in coaxial cable) or the pulses of light in optical fiber. In optics, one important and familiar consequence
Dispersion_(optics)
sliding-mode control) Pulse-density modulation – A generalized form of delta-sigma modulation. Pulse-width modulation – Another modulation scheme that produces
Variable_structure_control
Encoding method used on early floppy and hard disk drives
modulation, or MFM, starting in 1970. They referred to this format as "double density", with the original FM retroactively becoming "single density"
Frequency_modulation_encoding
Pulsar Pulsar wind nebula Pulse wave velocity Pulse-density modulation QT interval quadrature Quadrature amplitude modulation Quantum optics Quantum tunneling
Index_of_wave_articles
Topics referred to by the same term
collegiate sorority, absorbed by Alpha Omicron Pi Delta-sigma modulation, a pulse density modulation scheme used in analog-to-digital and digital-to-analog conversions
Delta_Sigma
Interference effect in radar systems
than one frequency or using modulation techniques like pulse compression that change the frequency over the period of a pulse. In these cases, it is unlikely
Fluctuation_loss
Procedure used in oil well drilling
encoded in the pressure signal using line codes or pulse-position modulation. Negative pulse Negative pulse tools briefly open and close the valve to release
Measurement_while_drilling
Type of radar where a known stable frequency continuous wave radio energy is transmitted
demodulation strategy used with pulse compression. This takes place before Doppler CFAR detection processing. A large modulation index is needed for practical
Continuous-wave_radar
Laser mode-locking method
optimum focus from the continuous-wave operation to pulsed operation while changing the power density by kicking the end mirror of the resonator cavity
Kerr-lens_modelocking
Optical transceiver used in high-bandwidth data communications
optical modules. The most common modulation technique historically has been on-off keying or NRZ. Pulse-amplitude modulation (PAM-4) has also been extensively
Optical_module
audio codec, pulse-code modulation (PCM), μ-law algorithm, audio filter, anti-aliasing filter, low-pass filter, pulse-density modulation (PDM) Electronic
List_of_MOSFET_applications
Method of encoding digital data on multiple carrier frequencies
multiplexing (OFDM) is a type of digital transmission used in digital modulation for encoding digital (binary) data on multiple carrier frequencies. OFDM
Orthogonal frequency-division multiplexing
Orthogonal_frequency-division_multiplexing
Device that emits light via optical amplification
be intentionally turned on and off at some rate to create pulses of light. When the modulation rate is on time scales much slower than the cavity lifetime
Laser
Tent function, often used in signal processing
be derived, for example in kernel density estimation. It also has applications in pulse-code modulation as a pulse shape for transmitting digital signals
Triangular_function
Pulse-width modulation rectifier
The Vienna rectifier is a three-phase AC pulse-width modulation rectifier, invented in 1993 by Johann W. Kolar at TU Wien, a public research university
Vienna_rectifier
Digital modulation scheme
Amplitude-shift keying (ASK) is a form of amplitude modulation that represents digital data as variations in the amplitude of a carrier wave. For example
Amplitude-shift_keying
Diffractionless propagation of a light beam
Maryland reported using filamenting femtosecond laser pulses in a square arrangement to produce a density gradient in air which acted as an optical waveguide
Filament_propagation
Theorem that tells the maximum rate at which information can be transmitted
number of distinct pulses M is given by M = 1 + A Δ V {\displaystyle M=1+{A \over \Delta V}} . By taking information per pulse in bit/pulse to be the base-2-logarithm
Shannon–Hartley_theorem
Electrolysis method
conventional pulse width modulation (PMW), multiple dependent variables can be altered, including the type of waveform, typically a rectangular pulse wave, the
Pulse_electrolysis
Sub-discipline of electrical engineering
communication systems: pulse-code modulation (PCM), differential pulse-code modulation (DPCM), delta modulation (DM), digital modulation – amplitude, phase- and
Electronics_engineering
Internal combustion engine sensor
injection (EFI) engines. Both sensor designs output a 0.0–5.0 volt or a pulse-width modulation (PWM) signal that is proportional to the air mass flow rate, and
Mass_flow_sensor
Branch of physics
get more bandwidth and to shape an SHG pulse like it is done in a dazzler. SHG of a pump and self-phase modulation (emulated by second-order processes)
Nonlinear_optics
Health consequences of exposure to elevated sound levels
resistance Equivalent pulse code modulation noise Impulse noise (audio) Noise figure Noise floor Noise shaping Noise spectral density Noise, vibration, and
Health_effects_from_noise
Study of physics on quintillionth-second timescales
chirped pulse amplification (CPA) (1988), spectral broadening of high-energy pulses (e.g. gas-filled hollow-core fiber via self-phase modulation) (1996)
Attosecond_physics
Printing process
only one color of ink, in dots of differing size (pulse-width modulation) or spacing (frequency modulation) or both. This reproduction relies on a basic optical
Halftone
Very low energy, short range radio precise positioning
enabling pulse-position or time modulation. The information can also be modulated on UWB signals (pulses) by encoding the polarity of the pulse, its amplitude
Ultra-wideband
sliding-mode control) Pulse-density modulation – A generalized form of delta-sigma modulation Pulse-width modulation – Another modulation scheme that produces
Variable_structure_system
Process of removing noise from a signal
30 dB of noise reduction. Since analog video recordings use frequency modulation for the luminance part (composite video signal in direct color systems)
Noise_reduction
Method for reducing unwanted sound
resistance Equivalent pulse code modulation noise Impulse noise (audio) Noise figure Noise floor Noise shaping Noise spectral density Noise, vibration, and
Active_noise_control
Specification that defines an interface between a camera and a host processor
Efficiency (LRTE), Differential Pulse-Code Modulation (DPCM) compression and scrambling to reduce Power Spectral Density. In September 2019, the CSI-2 v3
Camera_Serial_Interface
Pulse amplitude – Pulse duration – Pulse – Pulse-address multiple access – Pulse-code modulation – Pulsed inductive thruster – Pulse-width modulation
Index_of_electronics_articles
Type of solid state switch
and off rapidly, the IGBT can synthesize complex waveforms with pulse-width modulation and low-pass filters, thus it is also used in switching amplifiers
Insulated-gate bipolar transistor
Insulated-gate_bipolar_transistor
Process of creating thru-holes using laser cutting methods
Low, D.K.Y; Li, L; Byrd, P.J (2001). "The influence of temporal pulse train modulation during laser percussion drilling". Optics and Lasers in Engineering
Laser_drilling
In signal processing, unwanted modifications to a signal
statistical signature of ambient noise for its suppression Equivalent pulse code modulation noise, measure of noise by comparing to PCM quantization noise Almost
Noise_(signal_processing)
Quantum states light can be in
Amplitude modulation (AM) and frequency modulation (FM) are the classical means to imprint information on a carrier field. (Frequency modulation is mathematically
Squeezed_states_of_light
Channel access method used by various radio communication technologies
simplest form, but can be combined with any modulation scheme like (in advanced cases) quadrature amplitude modulation (QAM) or orthogonal frequency-division
Code-division_multiple_access
Device for broadcasting television signals
reject the cross modulation products must be used at the output. The output power of the transmitter is defined as the power during sync pulse (Real output
Television_transmitter
Smoothing filler for images
resistance Equivalent pulse code modulation noise Impulse noise (audio) Noise figure Noise floor Noise shaping Noise spectral density Noise, vibration, and
Bilateral_filter
amplitude modulation (AM) and frequency modulation (FM) for low noise conditions. Digital communication systems: pulse code modulation, differential pulse-code
Education and training of electrical and electronics engineers
Education_and_training_of_electrical_and_electronics_engineers
Electronic multi-point fuel injection system
spring-loaded, actuated by a modulator-controlled electromagnet. Pulse-width modulation is used to change the amount of injected fuel: since the injection
Bendix_Electrojector
Non-linear optical process
{\displaystyle {N_{0}}({\vec {\mathbf {r} }})} is the population inversion density before pulse arrival, T 1 {\displaystyle T_{1}} and T 2 {\displaystyle T_{2}}
Self-focusing
Non-linear digital filtering technique to remove noise
resistance Equivalent pulse code modulation noise Impulse noise (audio) Noise figure Noise floor Noise shaping Noise spectral density Noise, vibration, and
Median_filter
Variation in the time intervals between heartbeats
detect beats include ECG, blood pressure, ballistocardiograms, and the pulse wave signal derived from a photoplethysmograph (PPG). ECG is considered
Heart_rate_variability
Type of interference created by switching-mode power supplies
is held constant and the voltage is modulated by varying pulse width (pulse-width modulation or PWM), thereby presenting a fixed frequency to the filter
Switching_noise_jitter
power density at a distance d from this source p = N 4 ⋅ π ⋅ d 2 {\displaystyle {\mbox{p}}={\frac {N}{4\cdot \pi \cdot d^{2}}}} Power density is also
Dipole field strength in free space
Dipole_field_strength_in_free_space
Device converting an AC waveform to another AC waveform
currents and bidirectional power flow can be realized by coupling a pulse-width modulation (PWM) rectifier and a PWM inverter to the DC-link. The DC-link quantity
AC-to-AC_converter
Medical imaging technique
pulse sequence, SS, achieves "slice selection". A shaped pulse (shown here with a sinc modulation) causes a 90° nutation of longitudinal nuclear magnetization
Physics of magnetic resonance imaging
Physics_of_magnetic_resonance_imaging
Methods to reduce sound pressure
of factors, including cell size, tortuosity, porosity, thickness, and density. The absorption aspect in soundproofing should not be confused with sound-absorbing
Soundproofing
Form of radar used to create images of landscapes
successive pulses of radio waves are transmitted to "illuminate" a target scene, and the echo of each pulse is received and recorded. The pulses are transmitted
Synthetic-aperture_radar
Range of usable frequencies
Rayleigh bandwidth of a simple radar pulse is defined as the inverse of its duration. For example, a one-microsecond pulse has a Rayleigh bandwidth of one
Bandwidth_(signal_processing)
vapor density can be set and kept uniform along the vapor source. AWAKE uses a laser pulse to ionize the Rb vapor. By propagating the laser pulse co-linearly
AWAKE
Pulse that is substantially slowed to less than the speed of light
of an optical pulse or other modulation of an optical carrier at a very low group velocity. Slow light occurs when a propagating pulse is substantially
Slow_light
Sufficiency theorem for reconstructing signals from samples
(corresponding physically to single-sideband modulation) of the zero-frequency case. In this case the elementary pulse is obtained from sin ( x ) / x {\displaystyle
Nyquist–Shannon sampling theorem
Nyquist–Shannon_sampling_theorem
2024 smartphone by Apple
60 Hz refresh rate and neither are flicker free due to the use of pulse-width modulation for brightness control. iPhone 16 features a more refined dual-lens
IPhone_16
Deterministic, in which pulse-width modulation (PWM) is applicable as programmed switching method and; Non-deterministic (or random modulation), characterized
Switching_control_techniques
Timing of substance within a medium
principle are ultrasonic distance-measuring devices, which emit an ultrasonic pulse and are able to measure the distance to a solid object based on the time
Time_of_flight
Plasma confinement device
HSX to perform heat pulse modulation studies. Plasmas as high as 3 kiloelectronvolts in temperature and about 8×1012/cc in density are routinely formed
Helically Symmetric Experiment
Helically_Symmetric_Experiment
level is low. The most common modulation techniques, wavelength modulation spectroscopy (WMS) and frequency modulation spectroscopy (FMS), achieve this
Laser_absorption_spectrometry
Damping unwanted vibrations of machinery
resistance Equivalent pulse code modulation noise Impulse noise (audio) Noise figure Noise floor Noise shaping Noise spectral density Noise, vibration, and
Acoustic_quieting
Photonic systems which use silicon as an optical medium
common technique to achieve modulation is to vary the density of free charge carriers. Variations of electron and hole densities change the real and the imaginary
Silicon_photonics
effect (electromagnetism) Pulse transformer Pulse-width modulation Pulse-amplitude modulation (PAM) Pulse-code modulation Pumped-storage hydroelectricity
Index of electrical engineering articles
Index_of_electrical_engineering_articles
Radio system used by the U.S. armed forces
Continuous Phase Shift Modulation (CPSM) at 5 megabit-per-second (Mbps), also referred to as Minimum Frequency Shift Keying (MFSK). The Pulses are transmitted
Joint Tactical Information Distribution System
Joint_Tactical_Information_Distribution_System
Technique for measuring chemical composition of a gas
level is low. The most common modulation techniques are wavelength modulation spectroscopy (WMS) and frequency modulation spectroscopy (FMS). In WMS the
Tunable diode laser absorption spectroscopy
Tunable_diode_laser_absorption_spectroscopy
Transmitting information over optical fiber
communication for transmitting information from one place to another by sending pulses of infrared or visible light through an optical fiber. The light is a form
Fiber-optic_communication
Random fluctuation in an electrical signal
spectral density is nearly equal throughout the frequency spectrum. The amplitude of the signal has very nearly a Gaussian probability density function
Noise_(electronics)
Dedicated magnetic tape data storage device
pulse-width modulation, using three different pulse lengths, short, medium, and long, which are timed by the system. On NTSC systems, the short pulse
Commodore_Datasette
Noise that reduces quantization error
Retrieved 10 September 2007. Goodall, W. M. (1951). "Television by pulse code modulation". Bell Syst. Tech. J. 30: 33–49. doi:10.1002/j.1538-7305.1951.tb01365
Dither
Definitions of terms used in amateur radio
transmit mode. Pulse Modulation A modulation technique that involves altering the characteristics of a periodic wave to vary the pulse amplitude, duration
Glossary_of_amateur_radio
PULSE DENSITY-MODULATION
PULSE DENSITY-MODULATION
Girl/Female
British, English, Greek, Jamaican
Deity
Girl/Female
Biblical
Millet, small pulse.
Surname or Lastname
English (Somerset)
English (Somerset) : apparently a habitational name from an unidentified place. It is probably a variant of Denslow or possibly Denley, neither of which are of identified origin.
Female
Native American
Native American Algonquin name PULES means "pigeon."
Girl/Female
British, English
Pulses
Girl/Female
American, Australian
God is My Judge
Boy/Male
Indian
Royal Boy
Girl/Female
Indian
Identity
Girl/Female
Tamil
Deity
Girl/Female
Indian
Deity
Surname or Lastname
English
English : metonymic occupational name for someone who made bags or purses or for an official in charge of expenditure, from Middle English purse (via Old English from Latin bursa).Scottish : variant of Purser.
Girl/Female
Hindu, Indian
People who Give
Girl/Female
Indian
Another Name of Happness
Biblical
millet; small pulse
Girl/Female
Indian
Boy/Male
Muslim
Identity
Girl/Female
Muslim
Identity
Boy/Male
Arabic, Gujarati, Hindu, Indian, Kannada, Muslim
Identity
Surname or Lastname
Dutch and North German (Hülse)
Dutch and North German (Hülse) : topographic name for someone who lived where holly grew, Middle Low German huls, hüls.English (mainly Lancashire) : habitational name from a place in Cheshire, recorded in the mid 13th century in the forms Holes, Holis, and Holys. This probably represents a Middle English plural of Old English holh ‘hollow’, ‘depression’ (see Hole).
Girl/Female
Native American
Pigeon.
PULSE DENSITY-MODULATION
PULSE DENSITY-MODULATION
Girl/Female
Hindu, Indian, Marathi
Pleased; Satisfied
Girl/Female
Indian, Tamil
Beautyful
Boy/Male
Arabic, Australian
Intelligent; Gentle
Girl/Female
Australian, Bengali, Gujarati, Hindu, Indian
Light of the Lamp; Light
Girl/Female
French
Youthful.
Boy/Male
Hindu
The Lord
Boy/Male
Hindu
Quality
Girl/Female
Native American
Young beaver.
Girl/Female
Arabic, Muslim
Head; Chief; Leader
Boy/Male
Teutonic American German Norse
Victorious defender.
PULSE DENSITY-MODULATION
PULSE DENSITY-MODULATION
PULSE DENSITY-MODULATION
PULSE DENSITY-MODULATION
PULSE DENSITY-MODULATION
n.
A sum of money offered as a prize, or collected as a present; as, to win the purse; to make up a purse.
n.
Depth of shade.
n.
Thickness; density; compactness.
v. t.
To draw up or contract into folds or wrinkles, like the mouth of a purse; to pucker; to knit.
n.
The quality of being dense, close, or thick; compactness; -- opposed to rarity.
n.
The condition of being the same with something described or asserted, or of possessing a character claimed; as, to establish the identity of stolen goods.
n.
Pulse; pease.
a.
Exciting the pulse; causing pulsation.
n.
Rarily; rareness; thinness, as of a fluid; as, the tenuity of the air; the tenuity of the blood.
n.
A purse or purse net.
n.
A seaweed of a reddish brown color, which is sometimes eaten, as in Scotland. The true dulse is Sarcophyllis edulis; the common is Rhodymenia. [Written also dillisk.]
a.
Pertaining to pulse; consisting of pulse.
v. i.
To beat, as the arteries; to move in pulses or beats; to pulsate; to throb.
n.
A purse or bag in which to carry or measure diamonds, etc.
n.
Hence, a treasury; finances; as, the public purse.
v. t.
To put into a purse.
n.
Regularly of the pulse.
n.
The quality or state of being tenuous; thinness, applied to a broad substance; slenderness, applied to anything that is long; as, the tenuity of a leaf; the tenuity of a hair.
n.
The ratio of mass, or quantity of matter, to bulk or volume, esp. as compared with the mass and volume of a portion of some substance used as a standard.
a.
Affected with purse pride; puffed up with the possession of riches.