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Signal processing technique in telecommunications
In telecommunications, frequency-division multiplexing (FDM) is a technique by which the total bandwidth available in a communication medium is divided
Frequency-division multiplexing
Frequency-division_multiplexing
Method of encoding digital data on multiple carrier frequencies
In telecommunications, orthogonal frequency-division multiplexing (OFDM) is a type of digital transmission used in digital modulation for encoding digital
Orthogonal frequency-division multiplexing
Orthogonal_frequency-division_multiplexing
Method of encoding digital data on multiple carrier frequencies
Non-orthogonal frequency-division multiplexing (N-OFDM) is a method of encoding digital data on multiple carrier frequencies with non-orthogonal intervals
Non-orthogonal frequency-division multiplexing
Non-orthogonal_frequency-division_multiplexing
Fiber-optic communications technology
In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single
Wavelength-division multiplexing
Wavelength-division_multiplexing
Method of combining multiple signals into one signal over a shared medium
fading) or beamforming (improved selectivity) rather than multiplexing. Frequency-division multiplexing (FDM) is inherently an analog technology. FDM achieves
Multiplexing
Multiplexing technique for digital signals
of the trunk line. Time-division multiplexing is used primarily for digital signals but may be applied in analog multiplexing, as above, in which two
Time-division_multiplexing
Method for multiplexing signals
Polarization-division multiplexing (PDM) is a physical layer method for multiplexing signals carried on electromagnetic waves, allowing two channels of
Polarization-division multiplexing
Polarization-division_multiplexing
Multi-user version of OFDM digital modulation
Orthogonal frequency-division multiple access (OFDMA) is a multi-user version of the popular orthogonal frequency-division multiplexing (OFDM) digital
Orthogonal frequency-division multiple access
Orthogonal_frequency-division_multiple_access
Type of digital communication link sharing
general time division multiplexing (TDM) and frequency division multiplexing (FDM). When performed correctly, statistical multiplexing can provide a
Statistical time-division multiplexing
Statistical_time-division_multiplexing
Sinusoidal wave without any modulation
several carriers at different frequencies to share a common physical transmission medium by frequency division multiplexing (as in a cable television system)
Carrier_wave
Various meanings of the terms
is orthogonal frequency-division multiplexing (OFDM), which refers to the use, by a single transmitter, of a set of frequency multiplexed signals with
Orthogonality
Process of varying one or more properties of a periodic waveform
of information through a single communication medium, using frequency-division multiplexing (FDM). For example, in cable television (which uses FDM), many
Signal_modulation
Concept in wireless communication engineering
arrangement is called mixed numerology. The nature of the orthogonal frequency-division multiplexing (OFDM) waveforms includes interconnected parameters (for example
Numerology_(wireless)
Channel access method used by various radio communication technologies
cases) quadrature amplitude modulation (QAM) or orthogonal frequency-division multiplexing (OFDM), which typically makes it very robust and efficient
Code-division_multiple_access
of sight (NLOS) coverage using beamforming and orthogonal frequency-division multiplexing (OFDM). Service was launched in ten cities in 2000. However
History_of_smart_antennas
Radio access technology for 5G networks
the air interface of 5G networks. It is based on orthogonal frequency-division multiplexing (OFDM), as is the 4G (fourth generation) long-term evolution
5G_NR
ITU standard for ADSL using discrete multitone modulation
bins produces a transmission system known as coded orthogonal frequency-division multiplexing (COFDM). In the context of G.992.1, the term "Discrete Multi-Tone"
G.992.1
Medium connecting more than one user or more than two communications hosts
A multiplexing scheme divides up the capacity of the medium. Common multiplexing schemes include time-division multiplexing and frequency-division multiplexing
Shared_medium
Type of telecommunications system
forms of multiplexing. Prominent multiplexing methods of the carrier signal are time-division multiplexing (TDM) and frequency-division multiplexing (FDM)
Carrier_system
Data communications modulation protocol
frequencies Frequency-change signaling Multiple frequency-shift keying (MFSK) Orthogonal frequency-division multiplexing (OFDM) Phase-shift keying (PSK) Federal
Frequency-shift_keying
Technology to send internet signals over conventional power line grids
modulation techniques of BPL are either frequency division multiplexing (FDM) or orthogonal frequency division multiplexing (OFDM), which are both superior to
Broadband_over_power_lines
Technique used to minimize interference between frequency bands
frequency band that is placed between adjacent frequency bands to minimize interference between them. It is used in frequency-division multiplexing.
Guard_band
Device that selects between several analog or digital input signals
access multiplexer (DSLAM) Inverse multiplexer Multiplexing Code-division multiplexing Frequency-division multiplexing Time-division multiplexing Wavelength-division
Multiplexer
channelization methods include packetizing, frequency-division multiplexing, and time-division multiplexing. Channel (communications) "Channelization Protocols
Channelization (telecommunications)
Channelization_(telecommunications)
telecommunications, the term multiplex baseband has the following meanings: In frequency-division multiplexing, the frequency band occupied by the aggregate
Multiplex_baseband
Frequency-division multiple access scheme
Single-carrier FDMA (SC-FDMA) is a frequency-division multiple access scheme. Originally known as Carrier Interferometry, it is also called linearly precoded
Single-carrier_FDMA
(macrodiversity) in orthogonal frequency-division multiplexing cellular networks. DSFN is based on the idea of single frequency networks, which is a group of radio
Dynamic single-frequency networks
Dynamic_single-frequency_networks
A master frequency generator or master electronic oscillator, in frequency-division multiplexing (FDM), is a piece of equipment used to provide system
Master_frequency_generator
Television transmission using digital encoding
standards: Digital Video Broadcasting (DVB) uses coded orthogonal frequency-division multiplexing (OFDM) modulation and supports hierarchical transmission. This
Digital_television
Signal processing technique in telecommunications
forth between a mobile-phone and a mobile phone base station). Frequency-division multiplexing (FDM) is also distinct from FDMA. FDM is a physical layer technique
Frequency-division multiple access
Frequency-division_multiple_access
Wireless technique of sending and receiving messages through water
pulse-position modulation (FPPM and PPM) Multiple frequency-shift keying (MFSK) Orthogonal frequency-division multiplexing (OFDM) Continuous Phase Modulation (CPM)
Underwater acoustic communication
Underwater_acoustic_communication
Means for multiple terminals to communicate over one medium
signaling data. Statistical time-division multiplexing multiple access is typically also based on time-domain multiplexing, but not in a cyclically repetitive
Channel_access_method
American electrical engineer
communications, including channel estimation for orthogonal frequency-division multiplexing and optical wireless communications She is a professor emerita
Sarah_Kate_Wilson
Microwave relay system
common carrier use. The system had six channels, and using frequency-division multiplexing, each could carry up to 480 telephone calls or a television
TD-2
Communication flowing simultaneously in both directions
automatic communications systems such as two-way data-links, time-division multiplexing can be used for time allocations for communications in a half-duplex
Duplex_(telecommunications)
Air interface for 4G and 5G broadband wireless communications
Multiple-input, multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) is the dominant air interface for 4G and 5G broadband wireless
MIMO-OFDM
Digital terrestrial television standard
other data in an MPEG transport stream, using coded orthogonal frequency-division multiplexing (COFDM or OFDM) modulation. It is also the format widely adopted
DVB-T
Wireless networking standard
specifications that defined requirements for an orthogonal frequency-division multiplexing (OFDM) communication system. It was originally designed to
IEEE_802.11a-1999
Wireless communications protocol
applications. NearLink employs the Cyclic Prefix-Orthogonal Frequency Division Multiplexing (Cyclic Prefix-OFDM) waveform to address latency issues in
NearLink
Wireless networking standard in the 802.11 family
next generation standard. The use of MIMO-OFDM (orthogonal frequency division multiplexing) to increase the data rate while maintaining the same spectrum
IEEE_802.11n
Analog video encoding system
and SECAM. Unlike the Frequency-Division Multiplexing (FDM) method used in those, MAC encoding uses a Time-Division Multiplexing (TDM) method. B-MAC was
B-MAC
Square matrix of cyclically shifted rows
the study of stationary stochastic processes. In orthogonal frequency-division multiplexing, the cyclic prefix prepended to each transmitted block makes
Circulant_matrix
Standard for computer networking over a cable television system
using frequency division multiplexing and separating new DOCSIS versions from old ones according to their operation frequencies. As frequency allocation
DOCSIS
Topics referred to by the same term
analyzing and/or visualizing the data generated by an aircraft Frequency-division multiplexing, a technique by which the total bandwidth available in a communication
FDM
Dedicated use of satellite bandwidth
one or more remote sites. This uses time-division multiplexing (TDM) as well as frequency-division multiplexing. It is a retronym of sorts, as it was the
Single_channel_per_carrier
Data transmission concept
channels or frequency bins using passband techniques to allow frequency-division multiplexing instead of sending a higher-quality signal. In data communications
Broadband
Radio signal transmission method
Dynamic frequency hopping List of multiple discoveries Maximum length sequence Orthogonal frequency-division multiplexing Radio-frequency sweep "Furthermore
Frequency-hopping spread spectrum
Frequency-hopping_spread_spectrum
Relay station
all voiceband repeaters obsolete. Frequency frogging repeaters were commonplace in frequency-division multiplexing systems from the middle to late 20th
Repeater
Radar technology
including lasers or traditional radio transceivers using frequency-division multiplexing, but it remains most closely associated with the radar field
Frequency_agility
Wireless networking standard
data simultaneously. With Wi-Fi 6, a similar multiplexing is introduced in the frequency-division multiplexing: OFDMA. With OFDMA, multiple clients are assigned
Wi-Fi_6
Optical multiplexing technique
Orbital angular momentum multiplexing is a physical layer method for multiplexing signals carried on electromagnetic waves using the orbital angular momentum
Orbital angular momentum multiplexing
Orbital_angular_momentum_multiplexing
channel spacing in optical frequency-division multiplexing (OFDM) systems. OFDM is a step beyond wavelength-division multiplexing (WDM). Normal WDM using
Intensity_modulation
using COFDMTooltip Orthogonal frequency-division multiplexing modulation. A total of eight national and one local 'multiplexes' are broadcast in the UK, guaranteed
Digital terrestrial television in the United Kingdom
Digital_terrestrial_television_in_the_United_Kingdom
Peak divided by the Root mean square (RMS) of the waveform
average power transmitted (Shannon–Hartley theorem). Orthogonal frequency-division multiplexing (OFDM) is a very promising modulation technique; perhaps its
Crest_factor
modulation (QAM), pulse-position modulation (PPM) and orthogonal frequency-division multiplexing (OFDM) could be leveraged for stress wave communication. The
Stress_wave_communication
Topics referred to by the same term
diseases Discrete multitone modulation, a form of orthogonal frequency-division multiplexing (OFDM) Definite Minimum Time, a term specific to protective
DMT_(disambiguation)
impedances and originally arose in connection with telephone frequency division multiplexing. The filter has a similar transfer function to the m-type,
Mm'-type_filter
traditional time-frequency domain used by OFDM (Orthogonal Frequency Division Multiplexing). The technology is designed to address challenges in high-mobility
Pulsone
Very low energy, short range radio precise positioning
500 MHz of a narrow-band carrier; for example, orthogonal frequency-division multiplexing (OFDM))—can access the UWB spectrum under the rules. A significant
Ultra-wideband
IBM PC's first LAN system
translate from each card's transmit frequency to the destination card's receive frequency. Frequency-division multiplexing allowed the cable to be shared with
IBM_PC_Network
Concept in radio communication
interval duration) for each media. DSL modems also use orthogonal frequency-division multiplexing to communicate with their DSLAM despite multipath. In this
Multipath_propagation
Transmission of information electromagnetically
according to frequency is called frequency-division multiplexing. Another term for the same concept is wavelength-division multiplexing, which is more
Telecommunications
Australian electrical engineer
2013 for his contributions to coherent optical orthogonal frequency-division multiplexing. He was also made a Fellow of the Optical Society. "William
William_Shieh
Discrete Fourier transform algorithm
processing signals. Specifically, it is utilized in Orthogonal frequency-division multiplexing (OFDM) systems, such as 4G LTE and 5G NR. The efficiency of
Fast_Fourier_transform
Family of wireless network protocols
carrier, whereas 802.11a, Wi-Fi 4, 5 and 6 use orthogonal frequency-division multiplexing. Channels are used half duplex and can be time-shared by multiple
Wi-Fi
Australian design engineer
"contributions to the theory and application of orthogonal frequency division multiplexing in wireless and optical communications". She was inducted to
Jean_Armstrong
DSL service where downstream bandwidth exceeds upstream bandwidth
generally terminates at a digital subscriber line access multiplexer (DSLAM) where another frequency splitter separates the voice band signal for the conventional
ADSL
Wireless broadband standard
scalable orthogonal frequency-division multiple access (SOFDMA), as opposed to the fixed orthogonal frequency-division multiplexing (OFDM) version with
WiMAX
American electrical engineer
telephone conversations simultaneously using the technique of frequency division multiplexing (FDM) and it was important for reasons of privacy, as well
George_Ashley_Campbell
ADSL signals the bandwidth is split into discrete parts using frequency-division multiplexing (FDM). In this case: 0–4 kHz is for voice, 26–138 kHz is the
ANSI_T1.413_Issue_2
Signal processing technique
move the frequency of the individual signals up to different frequencies, which share the channel. This is called frequency division multiplexing (FDM).
Heterodyne
Modulation technique to reduce signal interference
Complementary code keying Frequency-hopping spread spectrum Linear-feedback shift register Orthogonal frequency-division multiplexing Torrieri, Don (2018)
Direct-sequence spread spectrum
Direct-sequence_spread_spectrum
Technical applications of optics
modulation formats like phase-shift keying or even orthogonal frequency-division multiplexing have been investigated to counteract effects like dispersion
Photonics
Electrical cable
the power being provided through the inner screen. Through frequency-division multiplexing, the camera can send audio and video signals along the triax
Triaxial_cable
Channel between upper and lower cutoff frequencies of a band system
symmetric but are treated on a linear frequency scale for applications such as frequency-division multiplexing. John T. Taylor and Qiuting Huang (1997)
Center_frequency
Electronic device that emits radio waves
the frequency of the carrier is shifted between two frequencies which represent the two binary digits, 0 and 1. OFDM (orthogonal frequency-division multiplexing)
Transmitter
Topics referred to by the same term
du Québec, now CJNT-DT Time domain equalizer, in Orthogonal frequency-division multiplexing. Tax equalization Terra Est Quaestuosa, an online, text-based
TEQ
Early system for transmitting text over wires
different frequencies act as carriers of a modulated on-off signal. This was the harmonic telegraph, a form of frequency-division multiplexing. These various
Electrical_telegraph
Fourth-generation mobile telecommunications standard
One technology, spatial multiplexing, gained importance for its bandwidth conservation and power efficiency. Spatial multiplexing involves deploying multiple
4G
Electromagnetic radiation with wavelengths from 1 m to 1 mm
carriers such as AT&T Long Lines. Starting in the early 1950s, frequency-division multiplexing was used to send up to 5,400 telephone channels on each microwave
Microwave
Wi-Fi technology
standard. Wi-Fi Sensing adds measurements of the orthogonal frequency-division multiplexing (OFDM) RF signals used by the PHY to detect features in the
WiFi_Sensing
Former organization for adoption of ultra-wideband
and PHY layer specifications based on multi-band orthogonal frequency-division multiplexing (MB-OFDM). It was intended for short-range multimedia file
WiMedia_Alliance
FDD—Frequency-Division Duplexing FDD—Floppy Disk Drive FDE—Full disk encryption FDDI—Fiber Distributed Data Interface FDM—Frequency-Division Multiplexing
List of computing and IT abbreviations
List_of_computing_and_IT_abbreviations
Use of multiple antennas in radio
Spatial multiplexing techniques make the receivers very complex, and therefore they are typically combined with orthogonal frequency-division multiplexing (OFDM)
MIMO
Filter used in signal processing on continuous-time signals
telegraphy, these designs proved inadequate for successful frequency-division multiplexing. Network analysis was not yet powerful enough to provide the
Analogue_filter
World's first microwave relay telephone system
problem of multiplexing multiple signals into a single connection. Previously, telephone systems accomplished this with frequency division multiplexing, shifting
Wireless_Set_Number_10
First CDMA-based digital cellular technology
[citation needed] or the oldest cellular standards that used frequency-division multiplexing. In North America, the technology competed with Digital AMPS
CdmaOne
Function used in signal processing
and method for generating a root raised cosine orthogonal frequency division multiplexing (RRC OFDM) modulation", published 2003, issued 2006 Media
Window_function
Uses of radio and radio waves
channels of data are often transmitted using frequency-division multiplexing or time-division multiplexing. Telemetry is starting to be used in consumer
Applications_of_radio
transmission system based on 1's and 0's and a speed of 1.544mbps Time Division Multiplexing (TDM) Toll-free_telephone_number (TFN) A telephone number that is
List_of_telephony_terminology
Internet access networks: Frequency-division multiplexing (FDM), in which the available spectrum is divided into two parts: frequencies below 10 or 14 MHz (specific
G.9972
Subcarrier Multiplexing (SCM) is a method for combining (multiplexing) many different communications signals so that they can be transmitted along a single
Subcarrier_multiplexing
Telecommunications standard for the wireless transmission of data through radio signals
services. It uses advanced multiplexing techniques including code-division multiple access (CDMA) as well as time-division multiplexing (TDM) to maximize throughput
Evolution-Data_Optimized
Wireless communication technology using visible light
specifically with the introduction of optical orthogonal frequency-division multiplexing (O-OFDM) modulation methods which have been optimized for data
Li-Fi
Set of IEEE standards for wireless personal area networks
choosing between two technology proposals, Multi-band Orthogonal Frequency Division Multiplexing (MB-OFDM) and Direct Sequence UWB (DS-UWB), backed by two different
IEEE_802.15
Minimum sampling rate to avoid aliasing
telegraph line or passband channel such as a limited radio frequency band or a frequency division multiplex channel. When a continuous function, x ( t ) , {\displaystyle
Nyquist_rate
Analog multiplexing technique used in early telephone systems
conversation is shifted to a different frequency band, allowing the channels to share the line by frequency-division multiplexing (FDM). At the receiving end, filters
Carrier_telephony
Baseband analog video signal format
frequency-division technique, but it is much more complex than typical frequency-division multiplexing systems like the one used to multiplex analog radio
Composite_video
American telecommunications company
In the 1920s, AT&T adopted carrier telephony systems using frequency-division multiplexing to carry multiple telephone channels on a single pair of wires
AT&T Communications (1984–2010)
AT&T_Communications_(1984–2010)
Telecommunications networks transmitted by radio waves
companies, which used frequency-division multiplexing to add channels to their point-to-point wireline plants before time-division multiplexing rendered FDM obsolete
Cellular_network
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FREQUENCY DIVISION-MULTIPLEXING
FREQUENCY DIVISION-MULTIPLEXING
Boy/Male
Biblical
God of divisions.
Biblical
division
Biblical
separation; division
Girl/Female
Biblical
Division.
Girl/Female
Biblical
Separation, division.
Biblical
division; rupture
Boy/Male
Indian
Decision
Biblical
divisions
Girl/Female
Indian, Telugu
Decision
Boy/Male
American, Australian, British, English
Son of David; David's Son; Surname
Girl/Female
Biblical
Division.
Girl/Female
Arabic, Muslim
Prolific; Frequently Producing
Boy/Male
English
David's son. Surname.
Boy/Male
Australian, Scandinavian, Teutonic
A Division; The Barn
Girl/Female
Biblical
Divisions.
Girl/Female
Biblical
Separation, division.
Girl/Female
Biblical
Divisions.
Boy/Male
Muslim
Decision
Surname or Lastname
English (also frequent in Wales)
English (also frequent in Wales) : patronymic from the personal name Watkin.
Boy/Male
Biblical
Division, rupture.
FREQUENCY DIVISION-MULTIPLEXING
FREQUENCY DIVISION-MULTIPLEXING
FREQUENCY DIVISION-MULTIPLEXING
FREQUENCY DIVISION-MULTIPLEXING
FREQUENCY DIVISION-MULTIPLEXING
FREQUENCY DIVISION-MULTIPLEXING
FREQUENCY DIVISION-MULTIPLEXING
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