Faster access than browser!
44 relations: American Radio Relay League, Amplitude modulation, Angle modulation, Aurora, Automatic link establishment, Coherence bandwidth, Coherence time, Comb filter, Constant envelope, Decibel, Delay spread, Diplomatic Wireless Service, Dual-tone multi-frequency signaling, Earth–Moon–Earth communication, Eb/N0, Fading, Forward error correction, Frequency modulation, Frequency-hopping spread spectrum, Frequency-shift keying, High frequency, In-band signaling, Institution of Electrical Engineers, Intermodulation, Intersymbol interference, Joseph Hooton Taylor Jr., Letter beacon, M-ary transmission, Multi-frequency signaling, Multipath propagation, Near vertical incidence skywave, Noisy-channel coding theorem, Olivia MFSK, OZ7IGY, Phreaking, PSK31, Radio Society of Great Britain, Radioteletype, Signal-to-noise ratio, Signaling (telecommunications), Skywave, Ultra high frequency, Very high frequency, WSJT (amateur radio software).
American Radio Relay League
The American Radio Relay League (ARRL) is the largest membership association of amateur radio enthusiasts in the USA.
New!!: Multiple frequency-shift keying and American Radio Relay League · See more »
Amplitude modulation
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier wave.
New!!: Multiple frequency-shift keying and Amplitude modulation · See more »
Angle modulation
Angle modulation is a class of carrier modulation that is used in telecommunications transmission systems.
New!!: Multiple frequency-shift keying and Angle modulation · See more »
Aurora
An aurora (plural: auroras or aurorae), sometimes referred to as polar lights, northern lights (aurora borealis) or southern lights (aurora australis), is a natural light display in the Earth's sky, predominantly seen in the high-latitude regions (around the Arctic and Antarctic).
New!!: Multiple frequency-shift keying and Aurora · See more »
Automatic link establishment
Automatic Link Establishment, commonly known as ALE, is the worldwide de facto standard for digitally initiating and sustaining HF radio communications.
New!!: Multiple frequency-shift keying and Automatic link establishment · See more »
Coherence bandwidth
Coherence bandwidth is a statistical measurement of the range of frequencies over which the channel can be considered "flat", or in other words the approximate maximum bandwidth or frequency interval over which two frequencies of a signal are likely to experience comparable or correlated amplitude fading.
New!!: Multiple frequency-shift keying and Coherence bandwidth · See more »
Coherence time
For an electromagnetic wave, the coherence time is the time over which a propagating wave (especially a laser or maser beam) may be considered coherent.
New!!: Multiple frequency-shift keying and Coherence time · See more »
Comb filter
In signal processing, a comb filter is a filter implemented by adding a delayed version of a signal to itself, causing constructive and destructive interference.
New!!: Multiple frequency-shift keying and Comb filter · See more »
Constant envelope
Constant envelope is achieved when a sinusoidal waveform reaches equilibrium in a specific system.
New!!: Multiple frequency-shift keying and Constant envelope · See more »
Decibel
The decibel (symbol: dB) is a unit of measurement used to express the ratio of one value of a physical property to another on a logarithmic scale.
New!!: Multiple frequency-shift keying and Decibel · See more »
Delay spread
In telecommunications, the delay spread is a measure of the multipath richness of a communications channel.
New!!: Multiple frequency-shift keying and Delay spread · See more »
Diplomatic Wireless Service
The Diplomatic Wireless Service (DWS) was the name of the communications system set up for the British Foreign Office by Brigadier Richard Gambier-Parry, the first Foreign Office Director of Communications, in the latter part of 1945.
New!!: Multiple frequency-shift keying and Diplomatic Wireless Service · See more »
Dual-tone multi-frequency signaling
Dual-tone multi-frequency signaling (DTMF) is an in-band telecommunication signaling system using the voice-frequency band over telephone lines between telephone equipment and other communications devices and switching centers.
New!!: Multiple frequency-shift keying and Dual-tone multi-frequency signaling · See more »
Earth–Moon–Earth communication
Earth–Moon–Earth communication (EME), also known as moon bounce, is a radio communications technique that relies on the propagation of radio waves from an Earth-based transmitter directed via reflection from the surface of the Moon back to an Earth-based receiver.
New!!: Multiple frequency-shift keying and Earth–Moon–Earth communication · See more »
Eb/N0
Eb/N0 (the energy per bit to noise power spectral density ratio) is an important parameter in digital communication or data transmission.
New!!: Multiple frequency-shift keying and Eb/N0 · See more »
Fading
In wireless communications, fading is variation or the attenuation of a signal with various variables.
New!!: Multiple frequency-shift keying and Fading · See more »
Forward error correction
In telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels.
New!!: Multiple frequency-shift keying and Forward error correction · See more »
Frequency modulation
In telecommunications and signal processing, frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.
New!!: Multiple frequency-shift keying and Frequency modulation · See more »
Frequency-hopping spread spectrum
Frequency-hopping spread spectrum (FHSS) is a method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver.
New!!: Multiple frequency-shift keying and Frequency-hopping spread spectrum · See more »
Frequency-shift keying
Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of a carrier signal.
New!!: Multiple frequency-shift keying and Frequency-shift keying · See more »
High frequency
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz).
New!!: Multiple frequency-shift keying and High frequency · See more »
In-band signaling
In telecommunications, in-band signaling is the sending of control information within the same band or channel used for voice or video.
New!!: Multiple frequency-shift keying and In-band signaling · See more »
Institution of Electrical Engineers
The Institution of Electrical Engineers (IEE, pronounced I-E-E) was a British professional organisation of electronics, electrical, manufacturing, and Information Technology professionals, especially electrical engineers.
New!!: Multiple frequency-shift keying and Institution of Electrical Engineers · See more »
Intermodulation
Intermodulation (IM) or intermodulation distortion (IMD) is the amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities in a system.
New!!: Multiple frequency-shift keying and Intermodulation · See more »
Intersymbol interference
In telecommunication, intersymbol interference (ISI) is a form of distortion of a signal in which one symbol interferes with subsequent symbols.
New!!: Multiple frequency-shift keying and Intersymbol interference · See more »
Joseph Hooton Taylor Jr.
Joseph Hooton Taylor Jr. (born March 29, 1941) is an American astrophysicist and Nobel Prize in Physics laureate for his discovery with Russell Alan Hulse of a "new type of pulsar, a discovery that has opened up new possibilities for the study of gravitation.".
New!!: Multiple frequency-shift keying and Joseph Hooton Taylor Jr. · See more »
Letter beacon
Letter beacons are radio transmissions of uncertain origin and unknown purpose, consisting of only a single repeating Morse code letter.
New!!: Multiple frequency-shift keying and Letter beacon · See more »
M-ary transmission
An M-ary transmission is a type of digital modulation where instead of transmitting one bit at a time, two or more bits are transmitted simultaneously.
New!!: Multiple frequency-shift keying and M-ary transmission · See more »
Multi-frequency signaling
In telephony, multi-frequency signaling (MF) is a signaling system that was introduced by the Bell System after World War II.
New!!: Multiple frequency-shift keying and Multi-frequency signaling · See more »
Multipath propagation
In wireless telecommunications, multipath is the propagation phenomenon that results in radio signals reaching the receiving antenna by two or more paths.
New!!: Multiple frequency-shift keying and Multipath propagation · See more »
Near vertical incidence skywave
Near vertical incidence skywave, or NVIS, is a skywave radio-wave propagation path that provides usable signals in the range between groundwave and conventional skywave distances—usually 30–400 miles (50–650 km).
New!!: Multiple frequency-shift keying and Near vertical incidence skywave · See more »
Noisy-channel coding theorem
In information theory, the noisy-channel coding theorem (sometimes Shannon's theorem or Shannon's limit), establishes that for any given degree of noise contamination of a communication channel, it is possible to communicate discrete data (digital information) nearly error-free up to a computable maximum rate through the channel.
New!!: Multiple frequency-shift keying and Noisy-channel coding theorem · See more »
Olivia MFSK
Olivia MFSK is an amateur radioteletype protocol, using multiple frequency-shift keying (MFSK) and designed to work in difficult (low signal-to-noise ratio plus multipath propagation) conditions on shortwave bands.
New!!: Multiple frequency-shift keying and Olivia MFSK · See more »
OZ7IGY
OZ7IGY is a Danish amateur radio beacon, and the world's oldest VHF and UHF amateur radio beacon and active since the International Geophysical Year in 1957.
New!!: Multiple frequency-shift keying and OZ7IGY · See more »
Phreaking
Phreaking is a slang term coined to describe the activity of a culture of people who study, experiment with, or explore telecommunication systems, such as equipment and systems connected to public telephone networks.
New!!: Multiple frequency-shift keying and Phreaking · See more »
PSK31
PSK31 or "Phase Shift Keying, 31 Baud", also BPSK31 and QPSK31, is a popular computer-sound card-generated radioteletype mode, used primarily by amateur radio operators to conduct real-time keyboard-to-keyboard chat, most often using frequencies in the high frequency amateur radio bands (near-shortwave).
New!!: Multiple frequency-shift keying and PSK31 · See more »
Radio Society of Great Britain
The Radio Society of Great Britain (RSGB), first founded in 1913 as the London Wireless Club, is the United Kingdom's recognised national society for amateur radio operators.
New!!: Multiple frequency-shift keying and Radio Society of Great Britain · See more »
Radioteletype
Radioteletype (RTTY) is a telecommunications system consisting originally of two or more electromechanical teleprinters in different locations connected by radio rather than a wired link.
New!!: Multiple frequency-shift keying and Radioteletype · See more »
Signal-to-noise ratio
Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
New!!: Multiple frequency-shift keying and Signal-to-noise ratio · See more »
Signaling (telecommunications)
In telecommunication, signaling has the following meanings.
New!!: Multiple frequency-shift keying and Signaling (telecommunications) · See more »
Skywave
In radio communication, skywave or skip refers to the propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically charged layer of the upper atmosphere.
New!!: Multiple frequency-shift keying and Skywave · See more »
Ultra high frequency
Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one decimeter.
New!!: Multiple frequency-shift keying and Ultra high frequency · See more »
Very high frequency
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten to one meter.
New!!: Multiple frequency-shift keying and Very high frequency · See more »
WSJT (amateur radio software)
WSJT is a computer program used for weak-signal radio communication between amateur radio operators.
New!!: Multiple frequency-shift keying and WSJT (amateur radio software) · See more »
Redirects here:
MFSK, MFSK16, MFSK8, Mfsk16, Mfsk32, Mfsk4, Mfsk64, Multi-frequency shift keying.
References
[1] https://en.wikipedia.org/wiki/Multiple_frequency-shift_keying
