• Thumbnail for Frequency modulation
    Frequency modulation (FM) is a signal modulation technique used in electronic communication, originally for transmitting messages with a radio wave. In...
    31 KB (4,003 words) - 11:38, 13 May 2025
  • Thumbnail for Frequency modulation 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...
    26 KB (3,196 words) - 07:16, 27 December 2024
  • 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...
    12 KB (1,577 words) - 14:03, 5 February 2025
  • low frequency radio waves, wavelength is on the scale of kilometers and building such a large antenna is not practical. Another purpose of modulation is...
    24 KB (3,051 words) - 14:49, 25 March 2025
  • Thumbnail for Amplitude modulation
    angle modulation, in which either the frequency of the carrier wave is varied, as in frequency modulation, or its phase, as in phase modulation. AM was...
    36 KB (4,695 words) - 19:35, 2 May 2025
  • Thumbnail for FM broadcasting
    FM broadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American...
    67 KB (7,967 words) - 17:40, 16 May 2025
  • Thumbnail for Pulse-frequency modulation
    Pulse-frequency modulation (PFM) is a modulation method for representing an analog signal using only two levels (1 and 0). It is analogous to pulse-width...
    5 KB (554 words) - 22:22, 6 March 2025
  • Thumbnail for Single-sideband modulation
    bandwidth of which is twice the maximum frequency of the original baseband signal. Single-sideband modulation avoids this bandwidth increase, and the...
    33 KB (4,814 words) - 06:24, 11 May 2025
  • Thumbnail for Frequency-shift keying
    Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is encoded on a carrier signal by periodically shifting the...
    16 KB (1,913 words) - 03:39, 31 July 2024
  • (ASK) digital modulation scheme or amplitude modulation (AM) analog modulation scheme. The two carrier waves are of the same frequency and are out of...
    15 KB (1,952 words) - 02:32, 10 February 2025
  • Thumbnail for Line code
    Modified frequency modulation, Miller encoding and delay encoding Non-return-to-zero (NRZ) Non-return-to-zero, inverted (NRZI) Pulse-position modulation (PPM)...
    16 KB (1,665 words) - 05:58, 19 March 2025
  • carrier wave. Phase modulation is one of the two principal forms of angle modulation, together with frequency modulation. In phase modulation, the instantaneous...
    6 KB (674 words) - 19:42, 2 May 2025
  • Thumbnail for Ring modulation
    In electronics, ring modulation is a signal processing function, an implementation of frequency mixing, in which two signals are combined to yield an output...
    26 KB (2,972 words) - 18:11, 27 March 2025
  • modulation is a class of signal modulation that is used in telecommunication transmission systems using carrier waves. The class comprises frequency modulation...
    6 KB (858 words) - 17:52, 5 May 2025
  • Thumbnail for Pulse-width modulation
    Pulse-width modulation (PWM), also known as pulse-duration modulation (PDM) or pulse-length modulation (PLM), is any method of representing a signal as...
    29 KB (4,017 words) - 13:17, 17 May 2025
  • phase modulation (CPM) is a method for modulation of data commonly used in wireless modems. In contrast to other coherent digital phase modulation techniques...
    6 KB (939 words) - 15:17, 31 August 2024
  • Some modulation schemes, such as frequency modulation, survive the nonlinear distortion without ill effect (but schemes such as amplitude modulation do...
    14 KB (1,760 words) - 23:59, 23 February 2025
  • Thumbnail for Continuous-wave radar
    f_{d}\approx 2v{\frac {f_{t}}{c'}}} Continuous-wave radar without frequency modulation (FM) only detects moving targets, as stationary targets (along the...
    26 KB (3,814 words) - 22:16, 6 March 2025
  • Thumbnail for Sideband
    a sideband is a band of frequencies higher than or lower than the carrier frequency, that are the result of the modulation process. The sidebands carry...
    9 KB (1,261 words) - 23:20, 1 October 2024
  • Thumbnail for Non-contact atomic force microscopy
    on resonance (frequency modulation). The two most common modes of nc-AFM operation, frequency modulation (FM) and amplitude modulation (AM), are described...
    35 KB (4,141 words) - 08:18, 4 April 2025
  • Thumbnail for Orthogonal frequency-division multiplexing
    telecommunications, orthogonal frequency-division multiplexing (OFDM) is a type of digital transmission used in digital modulation for encoding digital (binary)...
    88 KB (11,274 words) - 02:38, 9 March 2025
  • Thumbnail for Voltage-controlled oscillator
    oscillation frequency. Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating signal to the control...
    17 KB (2,011 words) - 09:01, 16 January 2025
  • Thumbnail for Carrier wave
    information through a process called modulation. One or more of the wave's properties, such as amplitude or frequency, are modified by an information bearing...
    6 KB (801 words) - 17:23, 26 April 2025
  • Thumbnail for AM broadcasting
    AM radio's audiences declined greatly due to competition from FM (frequency modulation) radio, Digital Audio Broadcasting (DAB), satellite radio, HD (digital)...
    76 KB (9,263 words) - 16:09, 22 April 2025
  • Electromagnetic radiation Electromagnetic spectrum EMF measurement Frequency allocation Frequency modulation (FM) Plastic welding Pulsed electromagnetic field therapy...
    14 KB (987 words) - 18:34, 16 April 2025
  • Thumbnail for Radar
    Another form of distance measuring radar is based on frequency modulation. In these systems, the frequency of the transmitted signal is changed over time....
    102 KB (12,042 words) - 04:14, 10 May 2025
  • Thumbnail for Delta-sigma modulation
    sigma-delta, ΣΔ) modulation is an oversampling method for encoding signals into low bit depth digital signals at a very high sample-frequency as part of the...
    59 KB (6,863 words) - 21:03, 21 April 2025
  • Thumbnail for Transmitter
    modulation signal. In an FM (frequency modulation) transmitter the frequency of the carrier is varied by the modulation signal. In an FSK (frequency-shift...
    23 KB (2,485 words) - 06:49, 4 April 2025
  • measurement standards, many of which also use related techniques such as frequency modulation spectroscopy. Named after R. V. Pound, Ronald Drever, and John L...
    15 KB (1,888 words) - 23:35, 21 February 2025
  • Thumbnail for Phasor
    is the modulation depth and f m {\displaystyle f_{m}} is the frequency of the modulating signal, then for amplitude modulation the two modulation phasors...
    31 KB (4,997 words) - 08:14, 17 January 2025