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81 relations: Bandwidth (computing), Bandwidth (signal processing), Baseband, Baud, Baudot code, Binary number, Bipolar encoding, Bit, Bit rate, Carrier frequency, Carrier wave, Chip (CDMA), Co-channel interference, Code, Code-division multiple access, Communication channel, Constellation diagram, Data, Data signaling rate, Data transmission, DC bias, Digital television, Dual-tone multi-frequency signaling, Duplex (telecommunications), DVB-H, DVB-T, Electric power, Error detection and correction, Ethernet, Ethernet over twisted pair, Eye pattern, Fiber Distributed Data Interface, Flag semaphore, Frequency, Frequency-division multiplexing, Frequency-shift keying, Gating (telecommunication), Global Positioning System, IEEE 1394, Information, Information theory, Line code, List of interface bit rates, List of ITU-T V-series recommendations, Logarithm, Megabit, Military communications, MLT-3 encoding, Mobile phone, Modem, ..., Modulation, Multiple frequency-shift keying, Nyquist rate, Orthogonal frequency-division multiplexing, Oscilloscope, Passband, Phase (waves), Phase-shift keying, Pulse (signal processing), Pulse-code modulation, Pulse-position modulation, Quadrature amplitude modulation, Radio jamming, Ralph Hartley, Reed–Solomon error correction, Self-synchronizing code, Shannon–Hartley theorem, Signal transition, Signaling (telecommunications), Spectral efficiency, Spread spectrum, Synchronization, Syncword, Telecommunication, Time, Truth value, Unit interval (data transmission), United States Department of Defense, USB, Wavelength, 4B3T. Expand index (31 more) »
Bandwidth (computing)
In computing, bandwidth is the maximum rate of data transfer across a given path.
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Bandwidth (signal processing)
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.
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Baseband
Baseband is a signal that has a very narrow and near-zero frequency range, i.e. a spectral magnitude that is nonzero only for frequencies in the vicinity of the origin (termed f.
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Baud
In telecommunication and electronics, baud (symbol: Bd) is a common measure of the speed of communication over a data channel.
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Baudot code
The Baudot code, invented by Émile Baudot, is a character set predating EBCDIC and ASCII.
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Binary number
In mathematics and digital electronics, a binary number is a number expressed in the base-2 numeral system or binary numeral system, which uses only two symbols: typically 0 (zero) and 1 (one).
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Bipolar encoding
In telecommunication, bipolar encoding is a type of return-to-zero (RZ) line code, where two nonzero values are used, so that the three values are +, −, and zero.
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Bit
The bit (a portmanteau of binary digit) is a basic unit of information used in computing and digital communications.
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Bit rate
In telecommunications and computing, bit rate (bitrate or as a variable R) is the number of bits that are conveyed or processed per unit of time.
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Carrier frequency
In telecommunication systems, Carrier frequency is a technical term used to indicate.
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Carrier wave
In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an input signal for the purpose of conveying information.
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Chip (CDMA)
In digital communications, a chip is a pulse of a direct-sequence spread spectrum (DSSS) code, such as a Pseudo-random Noise (PN) code sequence used in direct-sequence code division multiple access (CDMA) channel access techniques.
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Co-channel interference
Co-channel interference or CCI is crosstalk from two different radio transmitters using the same channel.
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Code
In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form or representation, sometimes shortened or secret, for communication through a communication channel or storage in a storage medium.
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Code-division multiple access
Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies.
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Communication channel
A communication channel or simply channel refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel in telecommunications and computer networking.
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Constellation diagram
A constellation diagram is a representation of a signal modulated by a digital modulation scheme such as quadrature amplitude modulation or phase-shift keying.
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Data
Data is a set of values of qualitative or quantitative variables.
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Data signaling rate
In telecommunication, data signaling rate (DSR), also known as gross bit rate, is the aggregate rate at which data pass a point in the transmission path of a data transmission system.
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Data transmission
Data transmission (also data communication or digital communications) is the transfer of data (a digital bitstream or a digitized analog signal) over a point-to-point or point-to-multipoint communication channel.
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DC bias
When describing a periodic function in the time domain, the DC bias, DC component, DC offset, or DC coefficient is the mean amplitude of the waveform.
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Digital television
Digital television (DTV) is the transmission of television signals, including the sound channel, using digital encoding, in contrast to the earlier television technology, analog television, in which the video and audio are carried by analog signals.
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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.
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Duplex (telecommunications)
A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions.
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DVB-H
DVB-H (Digital Video Broadcasting - Handheld) is one of three prevalent mobile TV formats.
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DVB-T
DVB-T is an abbreviation for "Digital Video Broadcasting — Terrestrial"; it is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 and first broadcast in the UK in 1998.
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Electric power
Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit.
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Error detection and correction
In information theory and coding theory with applications in computer science and telecommunication, error detection and correction or error control are techniques that enable reliable delivery of digital data over unreliable communication channels.
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Ethernet
Ethernet is a family of computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN).
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Ethernet over twisted pair
Ethernet over twisted pair technologies use twisted-pair cables for the physical layer of an Ethernet computer network.
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Eye pattern
In telecommunication, an eye pattern, also known as an eye diagram, is an oscilloscope display in which a digital signal from a receiver is repetitively sampled and applied to the vertical input, while the data rate is used to trigger the horizontal sweep.
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Fiber Distributed Data Interface
Fiber Distributed Data Interface (FDDI) is a standard for data transmission in a local area network.
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Flag semaphore
Flag semaphore (from the Greek σῆμα, sema, meaning sign and φέρω, phero, meaning to bear; altogether the sign-bearer) is the telegraphy system conveying information at a distance by means of visual signals with hand-held flags, rods, disks, paddles, or occasionally bare or gloved hands.
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Frequency
Frequency is the number of occurrences of a repeating event per unit of time.
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Frequency-division multiplexing
In telecommunications, frequency-division multiplexing (FDM) is a technique by which the total bandwidth available in a communication medium is divided into a series of non-overlapping frequency bands, each of which is used to carry a separate signal.
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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.
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Gating (telecommunication)
In telecommunication, the term gating has the following meanings.
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Global Positioning System
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Air Force.
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IEEE 1394
IEEE 1394 is an interface standard for a serial bus for high-speed communications and isochronous real-time data transfer.
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Information
Information is any entity or form that provides the answer to a question of some kind or resolves uncertainty.
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Information theory
Information theory studies the quantification, storage, and communication of information.
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Line code
Some signals are more prone to error than others when conveyed over a communication channel as the physics of the communication or storage medium constrains the repertoire of signals that can be used reliably.
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List of interface bit rates
This is a list of interface bit rates, is a measure of information transfer rates, or digital bandwidth capacity, at which digital interfaces in a computer or network can communicate over various kinds of buses and channels.
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List of ITU-T V-series recommendations
The ITU-T V-Series Recommendations on Data communication over the telephone network specify the protocols that govern approved modem communication standards and interfaces.
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Logarithm
In mathematics, the logarithm is the inverse function to exponentiation.
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Megabit
The megabit is a multiple of the unit bit for digital information.
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Military communications
Military communications or military signals involve all aspects of communications, or conveyance of information, by armed forces.
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MLT-3 encoding
MLT-3 encoding (Multi-Level Transmit) is a line code (a signaling method used in a telecommunication system for transmission purposes) that uses three voltage levels.
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Mobile phone
A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
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Modem
A modem (modulator–demodulator) is a network hardware device that modulates one or more carrier wave signals to encode digital information for transmission and demodulates signals to decode the transmitted information.
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Modulation
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.
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Multiple frequency-shift keying
Multiple frequency-shift keying (MFSK) is a variation of frequency-shift keying (FSK) that uses more than two frequencies.
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Nyquist rate
In signal processing, the Nyquist rate, named after Harry Nyquist, is twice the bandwidth of a bandlimited function or a bandlimited channel.
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Orthogonal frequency-division multiplexing
In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a method of encoding digital data on multiple carrier frequencies.
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Oscilloscope
An oscilloscope, previously called an oscillograph, and informally known as a scope or o-scope, CRO (for cathode-ray oscilloscope), or DSO (for the more modern digital storage oscilloscope), is a type of electronic test instrument that allows observation of varying signal voltages, usually as a two-dimensional plot of one or more signals as a function of time.
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Passband
A passband is the range of frequencies or wavelengths that can pass through a filter.
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Phase (waves)
Phase is the position of a point in time (an instant) on a waveform cycle.
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Phase-shift keying
Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave).
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Pulse (signal processing)
A pulse in signal processing is a rapid, transient change in the amplitude of a signal from a baseline value to a higher or lower value, followed by a rapid return to the baseline value.
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Pulse-code modulation
Pulse-code modulation (PCM) is a method used to digitally represent sampled analog signals.
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Pulse-position modulation
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 possible required time shifts.
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Quadrature amplitude modulation
Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information.
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Radio jamming
Radio jamming is the deliberate jamming, blocking or interference with authorized wireless communications.
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Ralph Hartley
Ralph Vinton Lyon Hartley (November 30, 1888 – May 1, 1970) was an electronics researcher.
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Reed–Solomon error correction
Reed–Solomon codes are a group of error-correcting codes that were introduced by Irving S. Reed and Gustave Solomon in 1960.
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Self-synchronizing code
In coding theory, especially in telecommunications, a self-synchronizing code is a uniquely decodable code in which the symbol stream formed by a portion of one code word, or by the overlapped portion of any two adjacent code words, is not a valid code word.
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Shannon–Hartley theorem
In information theory, the Shannon–Hartley theorem tells the maximum rate at which information can be transmitted over a communications channel of a specified bandwidth in the presence of noise.
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Signal transition
Signal transition, when referring to the modulation of a carrier signal, is a change from one significant condition to another.
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Signaling (telecommunications)
In telecommunication, signaling has the following meanings.
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Spectral efficiency
Spectral efficiency, spectrum efficiency or bandwidth efficiency refers to the information rate that can be transmitted over a given bandwidth in a specific communication system.
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Spread spectrum
In telecommunication and radio communication, spread-spectrum techniques are methods by which a signal (e.g., an electrical, electromagnetic, or acoustic signal) generated with a particular bandwidth is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth.
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Synchronization
Synchronization is the coordination of events to operate a system in unison.
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Syncword
In computer networks, a syncword, sync character, sync sequence or preamble is used to synchronize a data transmission by indicating the end of header information and the start of data.
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Telecommunication
Telecommunication is the transmission of signs, signals, messages, words, writings, images and sounds or information of any nature by wire, radio, optical or other electromagnetic systems.
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Time
Time is the indefinite continued progress of existence and events that occur in apparently irreversible succession from the past through the present to the future.
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Truth value
In logic and mathematics, a truth value, sometimes called a logical value, is a value indicating the relation of a proposition to truth.
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Unit interval (data transmission)
The unit interval is the minimum time interval between condition changes of a data transmission signal, also known as the pulse time or symbol duration time.
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United States Department of Defense
The Department of Defense (DoD, USDOD, or DOD) is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States Armed Forces.
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USB
USB (abbreviation of Universal Serial Bus), is an industry standard that was developed to define cables, connectors and protocols for connection, communication, and power supply between personal computers and their peripheral devices.
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Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
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4B3T
4B3T, which stands for 4 (four) Binary 3 (three) Ternary, is a line encoding scheme used for ISDN PRI interface.
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Redirects here:
Baud Rate, Baud rate, Modulation rate, Significant condition, Symbol (data), Symbol-rate.
References
[1] https://en.wikipedia.org/wiki/Symbol_rate
