Radio modulation modes

16VSB is an abbreviation for 16-level vestigial sideband modulation, capable of transmitting four bits (2⁴=16) at a time. ...more on Wikipedia about "16VSB"

2VSB is an abbreviation for 2-level vestigial sideband modulation, capable of transmitting one bit (2¹=2) at a time. ...more on Wikipedia about "2VSB"

32VSB is an acronym for 32-level vestigial sideband modulation, capable of transmitting five bits (2⁵=32) at a time. ...more on Wikipedia about "32VSB"

4VSB is an abbreviation for 4-level vestigial sideband modulation, capable of transmitting two bits (2²=4) at a time. ...more on Wikipedia about "4VSB"

8VSB is the 8-level vestigial sideband modulation method adopted for terrestrial broadcast of the ATSC digital television standard in the United States and Canada. ...more on Wikipedia about "8VSB"

ACSB Amplitude Compandored Sideband is a narrow-band modulation using a single sideband with a pilot tone, allowing an expander in the receiver to restore the amplitude that was severely compressed by the transmitter. (Note that most of the noise reduction circuits used in audio recording are also variations of companding.) This mode promised greater robustness and fade-resistance on HF than even SSB, but was pretty much leapfrogged in favor of spread ...more on Wikipedia about "ACSB"

Adaptive modulation is a transmission scheme in digital communications where the transmitter adapts its transmission mode in accordance with the channel. Depending on the condition of the channel, the transmitter could be adapting one or more of the following: constellation size, code rate, and power. ...more on Wikipedia about "Adaptive modulation" You are visiting www.shortopedia.com Radio_modulation_modes

Amplitude modulation (AM) is a form of modulation in which the amplitude of a carrier wave is varied in direct proportion to that of a modulating signal. (Contrast this with frequency modulation, in which the frequency of the carrier is varied; and phase modulation, in which the phase is varied.) ...more on Wikipedia about "Amplitude modulation"

Amplitude-shift keying (ASK) is a form of modulation which represents digital data as variations in the amplitude of a carrier wave. ...more on Wikipedia about "Amplitude-shift keying"

AMTOR is a specialised form of RTTY. The term is an acronym for AMateur Teleprinting Over Radio and is derived from the commercial SITOR system (Simplex Telex Over radio) developed primarily for maritime use in the 1970s. ...more on Wikipedia about "AMTOR"

Audio frequency-shift keying (AFSK) is a modulation technique by which digital data is represented as changes in the frequency ( pitch) of an audio tone, yielding an encoded signal suitable for transmission via radio or telephone. Normally, the transmitted audio alternates between two tones: one, the "mark", represents a binary one; the other, the "space", represents a binary zero. ...more on Wikipedia about "Audio frequency-shift keying"

Automatic Position Reporting System (APRS) is an amateur radio based automatic position reporting system for tracking and digital communications, and was developed by Bob Bruninga, callsign WB4APR , at the United States Naval Academy. ...more on Wikipedia about "Automatic Position Reporting System"

The Baudot code, named after its inventor Émile Baudot, is a character set predating EBCDIC and ASCII and used originally and primarily on teleprinters. ...more on Wikipedia about "Baudot code"

In telecommunication, the term carrier shift has the following meanings: ...more on Wikipedia about "Carrier shift"

A constellation diagram is a representation of a digital modulation scheme in the complex plane. ...more on Wikipedia about "Constellation diagram"

A continuous wave (CW) (or Continous Waveform) is an electromagnetic wave of constant amplitude and frequency; and in mathematical analysis, of infinite duration. Continuous wave is also the name given to an early method of radio transmission, in which a carrier wave is switched on and off. Information is carried in the rhythm and spacing with which the signal is sent. CW is thus is a form of on-off keying (OOK). ...more on Wikipedia about "Continuous wave"

In telecommunications, direct-sequence spread spectrum is a modulation technique where the ...more on Wikipedia about "Direct-sequence spread spectrum"

Frequency modulation (FM) is a form of modulation which represents information as variations in the instantaneous frequency of a carrier wave. (Contrast this with amplitude modulation, in which the amplitude of the carrier is varied while its frequency remains constant.) ...more on Wikipedia about "Frequency modulation"

Frequency-hopping spread spectrum (FHSS) is a spread-spectrum method of transmitting signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver. ...more on Wikipedia about "Frequency-hopping spread spectrum"

Frequency-shift keying (FSK) is a form of frequency modulation in which the modulating signal shifts the output frequency between predetermined values. ...more on Wikipedia about "Frequency-shift keying"

Gaussian minimum shift keying or GMSK is a kind of continuous phase frequency shift keying. The baseband modulation is generated by starting with a bitstream 0/1 and a bit-clock giving a timeslice for each bit. This is the type of modulation used in Global System for Mobile Communications (GSM). ...more on Wikipedia about "Gaussian minimum shift keying"

The Hellschreiber or Feldhellschreiber was a facsimile-based teleprinter invented by Rudolf Hell. It has since been emulated on computer sound cards by radio amateurs; the resulting mode is referred to as Hellschreiber, Feld-Hell, or simply Hell. ...more on Wikipedia about "Hellschreiber"

Independent sideband (ISB) is an AM single sideband mode which is used with some AM radio transmissions. Normally each sideband carries identical information, but ISB modulates two different input signals — one on the upper sideband, the other on the lower sideband. This is used in some kinds of AM stereo, but is generally otherwise prohibited in the U.S. by the FCC. ...more on Wikipedia about "Independent sideband"

In telecommunication, the term intersymbol interference (ISI) has the following meanings: ...more on Wikipedia about "Intersymbol interference"

Isochronous burst transmission is a method of data transmission. In a data network where the information-bearer channel rate is higher than the input data signaling rate, transmission is performed by interrupting, at controlled intervals, the data stream being transmitted. ...more on Wikipedia about "Isochronous burst transmission"

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