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Signal processing technique in telecommunications
Frequency-division multiple access (FDMA) is a channel access method used in some multiple-access protocols. FDMA allows multiple users to send data through
Frequency-division multiple access
Frequency-division_multiple_access
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
Channel access method for networks using a shared communications medium
Time-division multiple access (TDMA) is a channel access method for shared-medium networks. It allows several users to share the same frequency channel
Time-division_multiple_access
Means for multiple terminals to communicate over one medium
varies on each frame. Multi-frequency time-division multiple access (MF-TDMA) combines time and frequency multiple access. As an example, 2G cellular
Channel_access_method
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
Channel access method used by various radio communication technologies
Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where
Code-division_multiple_access
Electronics Engineers. p. 340. ISBN 9780780323407. Frequency-division multiple access Code-division multiple access Time-division multiple access v t e
Polarization-division multiple access
Polarization-division_multiple_access
Signal processing technique in telecommunications
example of frequency-division multiplexing is radio and television broadcasting, in which multiple radio signals at different frequencies pass through
Frequency-division multiplexing
Frequency-division_multiplexing
Method of combining multiple signals into one signal over a shared medium
widely used multiple access techniques are time-division multiple access (TDMA) and frequency-division multiple access (FDMA). Code-division multiplex techniques
Multiplexing
Channel-access method in communications
Space-division multiple access (SDMA), strictly a misnomer, is a technique to enhance the capacity of mobile and WiFi networks that use a base station
Space-division multiple access
Space-division_multiple_access
Method of encoding digital data on multiple carrier frequencies
orthogonal frequency-division multiplexing (OFDM) is a type of digital transmission used in digital modulation for encoding digital (binary) data on multiple carrier
Orthogonal frequency-division multiplexing
Orthogonal_frequency-division_multiplexing
3GPP interface
orthogonal frequency-division multiple access (OFDMA) radio-access for the downlink and single-carrier frequency-division multiple access (SC-FDMA) on
E-UTRA
Code used in global cellular networks
frequencies for numbering. Different frequencies (ARFCNs) are used for the frequency-based component of GSMs multiple access scheme (FDMA — frequency-division
Absolute radio-frequency channel number
Absolute_radio-frequency_channel_number
Communications technology
MF-TDMA ("Multi-frequency time-division multiple access") is a technology for dynamically sharing bandwidth resources in an over-the-air two-way communications
Multi-frequency time-division multiple access
Multi-frequency_time-division_multiple_access
Third generation mobile cellular system
based on the GSM standard. UMTS uses wideband code-division multiple access (W-CDMA) radio access technology to offer greater spectral efficiency and
UMTS
Telecommunications networks transmitted by radio waves
one cell gap between cells which reuse the same frequency in a standard frequency-division multiple access (FDMA) system. Consider the case of a taxi company
Cellular_network
Medium connecting more than one user or more than two communications hosts
time-division multiplexing and frequency-division multiplexing. Channel access methods for circuit switching include time-division multiple access, frequency-division
Shared_medium
Type of digital communication link sharing
following schemes: Random frequency-hopping orthogonal frequency division multiple access (RFH-OFDMA) Code-division multiple access (CDMA), where different
Statistical time-division multiplexing
Statistical_time-division_multiplexing
reliable Media access control layer. TSCH can be seen as a combination of Time-division multiple access and Frequency-division multiple access mechanisms
Time_Slotted_Channel_Hopping
Direction from which a signal is received
rates. In multiple access channels (code-division multiple access (CDMA), frequency-division multiple access (FDMA), time-division multiple access (TDMA))
Direction_of_arrival
Fiber-optic communications technology
Code-division multiple access – Channel access method used by various radio communication technologies Dark fiber – Unused optical fibre Frequency-division
Wavelength-division multiplexing
Wavelength-division_multiplexing
Use of multiple antennas in radio
aggressive frequency reuse in the early 1990s. Space-division multiple access (SDMA) uses directional or smart antennas to communicate on the same frequency with
MIMO
attributed to the multiple access methods used for transmission. The location of each mobile phone must be known to reuse a given band of frequencies in different
Routing_in_cellular_networks
Multiple access scheme in telecommunications
code-division multiple access (MC-CDMA) is a multiple access scheme used in OFDM-based telecommunication systems, allowing the system to support multiple users
Multi-carrier code-division multiple access
Multi-carrier_code-division_multiple_access
UMTS standards CDMA: Code-division multiple access TDMA: Time-division multiple access FDMA: Frequency-division multiple access Lee, William (2006). Wireless
Opportunity-Driven Multiple Access
Opportunity-Driven_Multiple_Access
Attempt at multiplexing Morse code messages by assigning them different sounds
audio frequencies. Acoustic telegraphy was similar in concept to present-day FDMA, or frequency-division multiple access, used with radio frequencies. The
Acoustic_telegraphy
Radio signal transmission method
to prevent eavesdropping, and to enable code-division multiple access (CDMA) communications. The frequency band is divided into smaller sub-bands. Signals
Frequency-hopping spread spectrum
Frequency-hopping_spread_spectrum
it was susceptible to cell phone "cloning" and it used a Frequency-division multiple access (FDMA) scheme and required significant amounts of wireless
History_of_mobile_phones
International standard for passive RFID item level identification
levels. Multiple-tag identification is performed using a combination of frequency-division multiple access and time-division multiple access (FTDMA).
ISO/IEC_18000-3
Mobile broadband communication standard
(220 mph) or 500 km/h (310 mph) depending on the frequency Orthogonal frequency-division multiple access for the downlink, Single-carrier FDMA for the uplink
LTE_(telecommunication)
Process of varying one or more properties of a periodic waveform
modulation is to transmit multiple channels of information through a single communication medium, using frequency-division multiplexing (FDM). For example
Signal_modulation
large computer server. Frequency-division multiple access (FDMA) provides multiuser access by separating the used frequencies. This is used in GSM to
Comparison of mobile phone standards
Comparison_of_mobile_phone_standards
ITU requirements for 4G mobile telecommunications
abandoned. It was replaced by orthogonal frequency-division multiple access and other frequency-division multiple access schemes. This is combined with MIMO
IMT_Advanced
Cellular telephone network standard since 1991
Telecommunications System (UMTS), code-division multiple access (CDMA) technology, nor the 4G LTE orthogonal frequency-division multiple access (OFDMA) technology standards
GSM
Early geostationary communications and weather satellite, launched in 1966
forecasting." It was the first satellite to use frequency-division multiple access which accepted multiple independent signals and downlinked them in a single
ATS-1
Type of shift register in computing
transmitted in the same channel at the same time and frequency, it is called code-division multiple access. Neither scheme should be confused with encryption
Linear-feedback shift register
Linear-feedback_shift_register
Distributed Data Interface FDM—Frequency-Division Multiplexing FDMA—Frequency-Division Multiple Access FDS—Fedora Directory Server FE—Frontend FEC—Forward Error
List of computing and IT abbreviations
List_of_computing_and_IT_abbreviations
Russian global navigation satellite system
signal; however, each transmits on a different frequency using a 15-channel frequency-division multiple access (FDMA) technique spanning either side from
GLONASS
Open source amateur radio mode
radios. M17 uses Frequency-Division Multiple Access (FDMA) technology in which different communication streams are separated by frequency and run concurrently
M17_(amateur_radio)
Wireless broadband standard
uses scalable orthogonal frequency-division multiple access (SOFDMA), as opposed to the fixed orthogonal frequency-division multiplexing (OFDM) version
WiMAX
Communication flowing simultaneously in both directions
carrier-sense multiple access, for example, 2-wire or hubbed Ethernet, Wireless local area networks and Bluetooth, can be considered as time-division duplexing
Duplex_(telecommunications)
Multiplexing technique for digital signals
time-division multiple access (TDMA) scheme, where several stations connected to the same physical medium, for example sharing the same frequency channel
Time-division_multiplexing
Series of wireless broadband standards
mobile 802.16e specification. 802.16e uses scalable orthogonal frequency-division multiple access (OFDMA) to carry data, supporting channel bandwidths of between
IEEE_802.16
Information rate that can be transmitted over a given bandwidth
efficiently limited frequency spectrum is utilized by the physical layer protocol, and sometimes by the medium access control (the channel access protocol). The
Spectral_efficiency
Network of American communications satellites
and other commercial communications satellites, including frequency division multiple-access, three-axis spacecraft stabilization and high-performance
Tracking and Data Relay Satellite System
Tracking_and_Data_Relay_Satellite_System
Computer networking system
assigned a portion of the channel on either a frequency-division multiple access or time-division multiple access basis. Since it was well known that in time-sharing
ALOHAnet
systems with P25 Time Division Multiple Access (TDMA) trunking to double the voice capacity of Frequency Division Multiple Access (FDMA) technology. The
Astro_(Motorola)
Radio standard
technology.” NXDN uses Frequency-Division Multiple Access (FDMA) technology in which different communication streams are separated by frequency and run concurrently
NXDN
IEEE standard
known and promoted as iBurst (or HC-SDMA, High Capacity Spatial Division Multiple Access). It was originally developed by ArrayComm and optimizes the use
IEEE_802.20
Set of telecommunications standards
or Frequency-Division Multiple Access (FDMA). However it proved more advantageous to use existing 12.5 kHz frequency allocations in Time Division Multiple
Project_25
Wireless communications technology using MIMO for multiple users
space-division multiple access (SDMA), because users are separated by their spatial channel characteristics rather than only by time, frequency, or code
Multi-user_MIMO
Unit used in 802.11 wireless
allocations) technique or combination of the two techniques. Frequency-division multiple access Single-carrier FDMA (SC-FDMA), a.k.a. linearly precoded OFDMA (LP-OFDMA)
Resource_Unit
requires manual frequency planning, which is an arduous task in time-division multiple access (TDMA) and frequency-division multiple access (FDMA) based
Channel_allocation_schemes
Professor of engineering
Engineers (IEEE) in 2016 for contributions to orthogonal frequency division multiple access cellular communication systems. Dr. Rangan received his B
Sundeep_Rangan
(WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications
List_of_WLAN_channels
coding and multiple access methods in wireless communications 2016 Sundeep Rangan For contributions to orthogonal frequency division multiple access cellular
List of fellows of IEEE Communications Society
List_of_fellows_of_IEEE_Communications_Society
Modulation technique to reduce signal interference
interference. Some practical and effective uses of DSSS include the code-division multiple access (CDMA) method, the IEEE 802.11b specification used in Wi-Fi networks
Direct-sequence spread spectrum
Direct-sequence_spread_spectrum
ETSI standard for cordless telephony
frequency channels from 1881.792 MHz to 1897.344 MHz with a band gap of 1728 kHz. DECT operates as a multicarrier frequency-division multiple access (FDMA)
DECT
Family of wireless network protocols
4, 5 and 6 use orthogonal frequency-division multiplexing. Channels are used half duplex and can be time-shared by multiple networks. Any packet sent
Wi-Fi
Type of telecommunications system
modulation of one or multiple carrier signals above the principal voice frequency or data rate. Carrier systems typically transmit multiple channels of communication
Carrier_system
First CDMA-based digital cellular technology
codes). CDMA permits several radios to share the same frequencies. Unlike time-division multiple access (TDMA), a competing system used in 2G GSM, all radios
CdmaOne
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
carrier-sense multiple access (CSMA), frequency-division multiple access (FDMA) or code-division multiple access (CDMA). The varying topology of the network
Mobile wireless sensor network
Mobile_wireless_sensor_network
Communications method involving a one-to-many connection
telephony via gigahertz radio frequencies. P2MP systems have been designed with and without a return channel from the multiple receivers. A central antenna
Point-to-multipoint communication
Point-to-multipoint_communication
Data transmission concept
signals at a wide spread of frequencies or several different simultaneous frequencies. It is used in fast Internet access where the transmission medium
Broadband
2G mobile-phone standard that uses time-division multiple access
York City. AMPS used Frequency Division Multiple Access (FDMA) which enabled each cell site to transmit on different frequencies, allowing many cell sites
Digital_AMPS
Spreading the frequency domain of a signal
rake receiver. Multiple access capability, known as code-division multiple access (CDMA) or code-division multiplexing (CDM). Multiple users can transmit
Spread_spectrum
IBM PC's first LAN system
to translate from each card's transmit frequency to the destination card's receive frequency. Frequency-division multiplexing allowed the cable to be shared
IBM_PC_Network
Telecommunications standard for the wireless transmission of data through radio signals
advanced multiplexing techniques including code-division multiple access (CDMA) as well as time-division multiplexing (TDM) to maximize throughput. It is
Evolution-Data_Optimized
Dedicated use of satellite bandwidth
internet access or telemetry, since a customer would have to pay for the satellite bandwidth even when they were not using it. Where multiple access is concerned
Single_channel_per_carrier
a frequency reuse of one. In such networks, neighboring cells use the same frequency spectrum. Such standards exploit Space Division Multiple Access (SDMA)
Radio_resource_management
Technology used to provide broadband to the end consumer via fiber
eavesdropping. Upstream signals are combined using a multiple access protocol, usually time-division multiple access (TDMA). Passive optical networks were first
Passive_optical_network
Spanish nanosatellite launched in 2004
needed] The whole experiment was carried in a separated FDMA (Frequency-Division Multiple-Access) capable channel (4 MHz), equipped with ASK. It was also possible
Nanosat_01
television – CMOS – Coaxial cable – Co-channel interference – Code-division multiple access – Code word – Coherence length – Coherence time – Coherence – Coherent
Index_of_electronics_articles
Wireless data link used by aviation
than VDL Mode 2. The data and digitized voice packets go in Time Division Multiple Access (TDMA) slots assigned by ground stations. The FAA implemented a
VHF_Data_Link
Satellite-provided Internet
hundreds of low-orbiting satellites in the Ka-band frequency, providing inexpensive Internet access with download speeds of up to 720 Mbit/s. However,
Satellite_Internet_access
Wireless networking standard
increased, since multiple clients can receive data simultaneously. With Wi-Fi 6, a similar multiplexing is introduced in the frequency-division multiplexing:
Wi-Fi_6
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
Broadband_over_power_lines
Telecommunication signaling system
Dual-tone multi-frequency (DTMF) signaling is a telecommunication signaling system using the voice-frequency band over telephone lines between telephone
DTMF_signaling
Receiving device on satellite dishes
LNB is a combination of low-noise amplifier, frequency mixer, local oscillator and intermediate frequency (IF) amplifier. It serves as the RF front end
Low-noise_block_downconverter
Wireless network standard
interference by using direct-sequence spread spectrum (DSSS) and orthogonal frequency-division multiplexing (OFDM) signaling methods, respectively. 802.11a uses
IEEE_802.11
Obsolete Ethernet standard
World. pp. 1, 8. Retrieved July 14, 2011. Broadband networks employ frequency-division multiplexing to divide coaxial cable into separate channels, each
10BROAD36
Signal processing technique for sensor arrays
evolution – LTE/UMB: multiple-input multiple-output (MIMO) precoding based beamforming with partial space-division multiple access (SDMA)[citation needed]
Beamforming
Packet-oriented mobile data service for 2G and 3G networks
expressed as a GPRS Multislot Class The multiple access methods used in GSM with GPRS are based on frequency-division duplex (FDD) and TDMA. During a session
GPRS
Physical or logical connection used for transmission of information
separation, such as by multipair cable or separation, such as by frequency-division or time-division multiplexing. A path for conveying electrical or electromagnetic
Communication_channel
Network that allows computers to share resources and communicate with each other
high-frequency radio technology similar to digital cellular. Wireless LANs use spread spectrum technology to enable communication between multiple devices
Computer_network
Radio standard by ETSI
existing DECT deployments. It uses the same Time Division slot timing and Frequency Division center frequencies and uses pre-transmit scanning to minimize co-channel
DECT-2020
Wireless networking standard in development
Coordinated Time Division Multiple Access (Co-TDMA) Coordinated Channel Recommendation (Co-CR) These Multi-AP schemes allow access points to manage interference
Wi-Fi_8
Antenna capable of modifying its frequency and radiation properties dynamically
communications systems converge because the multiple antennas required can be replaced by a single reconfigurable antenna. Frequency reconfiguration is generally achieved
Reconfigurable_antenna
Family of 3G mobile technology standards
broadband Internet access. It uses multiplexing techniques including code-division multiple access (CDMA) as well as time-division multiple access to maximize
CDMA2000
Radio communication system implemented in software
Unlike WebSDR, the frequency is limited to 3 Hz to 30 MHz (ELF to HF) OpenWebRX, an open-source software project, provides access to VHF and UHF spectrum
Software-defined_radio
SCMA, SubCarrier Multiple Access) is used in passive optical network (PON) access infrastructures as a variant of wavelength division multiplexing (WDM)
Subcarrier_multiplexing
Type of radio receiver
incoming radio-frequency (RF) signals to a fixed intermediate frequency (IF). The signal is then amplified and filtered at that fixed frequency. This arrangement
Superheterodyne_receiver
Tracking system using transceivers on ships
Incremental time division multiple access (ITDMA) Random access time division multiple access (RATDMA) Fixed access time division multiple access (FATDMA) Self-organizing
Automatic identification system
Automatic_identification_system
Fourth-generation mobile telecommunications standard
standard. The iBurst system (or HC-SDMA, High Capacity Spatial Division Multiple Access) was at an early stage considered to be a 4G predecessor. It was
4G
Communications signal technique
having a wide frequency response. An example of hybrid SS is TH-FHSS or hybrid TDMA (time division multiple access). Spread spectrum Frequency-hopping spread
Time-hopping
International standards consortium
Privacy, Network wide Beacon Power, and Bridge detection. MoCA Access is intended for multiple dwelling units (MDUs) such as hotels, resorts, hospitals, or
Multimedia_over_Coax_Alliance
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
Network device that connects DSL interfaces to a digital communications channel
line access multiplexer (DSLAM, often pronounced DEE-slam) is a network switch often located in telephone exchanges, that multiplexes multiple downstream
DSLAM
Radios operating in the very high frequency maritime mobile band
ship-to-aircraft. It uses FM channels in the very high frequency (VHF) radio band in the frequency range between 156 and 174 MHz, designated by the International
Marine_VHF_radio
FREQUENCY DIVISION-MULTIPLE-ACCESS
FREQUENCY DIVISION-MULTIPLE-ACCESS
Boy/Male
Hebrew
God will multiply.
Boy/Male
Hebrew Spanish
God will multiply.
Girl/Female
Biblical
Division.
Boy/Male
Hebrew
God will multiply.
Surname or Lastname
English (also frequent in Wales)
English (also frequent in Wales) : patronymic from the personal name Watkin.
Boy/Male
Hebrew
God will multiply.
Boy/Male
Hebrew Spanish
God will multiply.
Boy/Male
Australian, Vietnamese
Many; Multiple
Girl/Female
Biblical
Division.
Biblical
division
Boy/Male
Hindu, Indian
Un Countable; Multiple; Countless
Boy/Male
Hebrew American Latin
God will multiply.
Boy/Male
American, Australian, British, English
Son of David; David's Son; Surname
Boy/Male
Hebrew
God will multiply.
Boy/Male
Hebrew
God will multiply.
Boy/Male
Muslim
Multiple lights. Luster.
Boy/Male
English
David's son. Surname.
Boy/Male
Hebrew
God shall multiply.
Boy/Male
Hindu, Indian, Tamil
Multiple
Boy/Male
Hebrew
God will multiply.
FREQUENCY DIVISION-MULTIPLE-ACCESS
FREQUENCY DIVISION-MULTIPLE-ACCESS
Biblical
broken in pieces
Boy/Male
Tamil
Night
Boy/Male
Afghan, Arabic, Muslim, Pashtun
Flourishing
Boy/Male
Slavic Russian
Glory.
Girl/Female
Hindu
A bond between friendship and Love
Girl/Female
Indian, Kannada
Happy Life
Girl/Female
Indian, Sanskrit
Divine Night; Dream Night
Surname or Lastname
English
English : patronymic from Blank.
Girl/Female
American, Australian, Chinese, Hebrew
Helper of Almighty
Girl/Female
Hindu
Feather, Line, Saintly
FREQUENCY DIVISION-MULTIPLE-ACCESS
FREQUENCY DIVISION-MULTIPLE-ACCESS
FREQUENCY DIVISION-MULTIPLE-ACCESS
FREQUENCY DIVISION-MULTIPLE-ACCESS
FREQUENCY DIVISION-MULTIPLE-ACCESS
a.
Having many flues; as, a multiflue boiler. See Boiler.
a.
Manifold; multiple.
n.
The number by which another number is multiplied; a multiplier.
a.
Indicating division or distribution.
v. t.
To add (any given number or quantity) to itself a certain number of times; to find the product of by multiplication; thus 7 multiplied by 8 produces the number 56; to multiply two numbers. See the Note under Multiplication.
n.
An object of derision or scorn; a laughing-stock.
n.
Infrequency.
a.
That divides; pertaining to, making, or noting, a division; as, a divisional line; a divisional general; a divisional surgeon of police.
a.
Creating, or tending to create, division, separation, or difference.
n.
Cutting off; division; detachment of a part.
n.
The number by which another number is multiplied. See the Note under Multiplication.
adv.
At frequent or short intervals; many times; often; repeatedly; commonly.
n.
The act of revising; reexamination for correction; review; as, the revision of a book or writing, or of a proof sheet; a revision of statutes.
n.
Frequency; abundance.
n.
Vision.
n.
One who divides or makes division.
imp. & p. p.
of Multiply
n.
Often to be met with; happening at short intervals; often repeated or occurring; as, frequent visits.
n.
The condition of returning frequently; occurrence often repeated; common occurence; as, the frequency of crimes; the frequency of miracles.
n.
One who, or that which, multiplies or increases number.