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Channel-access method in communications
Space-division multiple access (SDMA), strictly a misnomer,[why?] 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
Signal processing technique in telecommunications
Alternatives include time-division multiple access (TDMA), code-division multiple access (CDMA), or space-division multiple access (SDMA). These protocols
Frequency-division multiple access
Frequency-division_multiple_access
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
Means for multiple terminals to communicate over one medium
In telecommunications and computer networks, a channel access method or multiple access method allows more than two terminals connected to the same transmission
Channel_access_method
Use of multiple antennas in radio
enable more aggressive frequency reuse in the early 1990s. Space-division multiple access (SDMA) uses directional or smart antennas to communicate on
MIMO
Topics referred to by the same term
space, as in case of Space-division multiple access This disambiguation page lists articles associated with the title Space Division. If an internal link
Space_Division
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
Wireless communications technology using MIMO for multiple users
communicates with one multi-antenna receiver. It is closely related to space-division multiple access (SDMA), because users are separated by their spatial channel
Multi-user_MIMO
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
Method of combining multiple signals into one signal over a shared medium
telephone access network, a switched Ethernet network, and a mesh network. In wireless communication, space-division multiplexing is achieved with multiple antenna
Multiplexing
Space flight simulator video game
Kerbal Space Program 2 is an abandoned space flight simulation video game formerly developed by Intercept Games and published by Private Division, before
Kerbal_Space_Program_2
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
year. Richard Roy and Björn Ottersten at Arraycomm patented a space-division multiple access method for wireless communication systems in the early 1990s
History_of_smart_antennas
Fiber-optic communications technology
waveguide grating – Optical multiplexer component Code-division multiple access – Channel access method used by various radio communication technologies
Wavelength-division multiplexing
Wavelength-division_multiplexing
Type of parabolic antenna
LNB to a 'multiswitch' switching matrix, which allows the connection of multiple receivers to the multiswitch in a star topology using the same signalling
Satellite_dish
Family of wireless network protocols
block radio waves or as large as many square kilometers using multiple overlapping access points with roaming permitted between them. Over time, the speed
Wi-Fi
Direction from which a signal is received
Radiolocation Time of arrival Triangulation Trilateration Wideband Space Division Multiple Access Direction finding Boquet, Guillem; Boquet-Pujadas, Aleix; Pisa
Angle_of_arrival
Telecommunications networks transmitted by radio waves
and access schemes: frequency-division multiple access (FDMA), time-division multiple access (TDMA), code-division multiple access (CDMA), and space-division
Cellular_network
Swedish electrical engineer
researcher, and electrical engineer who is the co-inventor of Space/Spatial Division Multiple Access (SDMA) technology. He has made contributions in array signal
Björn_Ottersten
Formula in telecommunications engineering of antenna performance
parts of the transmission formula that characterizes the behavior of a free-space radio circuit. This leads to his published form of his transmission formula:
Friis_transmission_equation
Multi-element, directional antenna useable over a wide band of frequencies
positioned along a support boom lying along the antenna axis. The elements are spaced at intervals following a logarithmic function of the frequency, known as
Log-periodic_antenna
frequencies in different cells and forms space-division multiple access (SDMA). FDMA is one of the multiple access methods used in cellular networks. 50 MHz
Routing_in_cellular_networks
Optical axis of a directional antenna
emitted by different antenna elements, and even radiate beams in multiple directions (multiple boresights). The term boresight came from high-gain antennas
Antenna_boresight
Wireless networking standard in the 802.11 family
clients) Multiple STAs, each with one or more antennas, transmit or receive independent data streams simultaneously. Space-division multiple access (SDMA):
IEEE_802.11ac
Transfer of information or power that does not require the use of physical wires
few meters for Bluetooth, or as far as millions of kilometers for deep-space radio communications. It encompasses various types of fixed, mobile, and
Wireless
Regions of an electromagnetic field
known in every point of space. In this reactive region, not only is an electromagnetic wave being radiated outward into far space but there is a reactive
Near_and_far_field
Bell Laboratories Layer Space-Time (BLAST) is a transceiver architecture for offering spatial multiplexing over multiple-antenna wireless communication
Bell Laboratories Layered Space-Time
Bell_Laboratories_Layered_Space-Time
Antenna with a fractal shape
or volume. Such fractal antennas are also referred to as multilevel and space filling curves, but the key aspect lies in their repetition of a motif over
Fractal_antenna
Short electrical transmission line
multiple resonant frequencies; in addition to the fundamental resonant frequency ω 0 {\displaystyle \ \omega _{0}\,} , they resonate at multiples of
Stub_(electronics)
Topics referred to by the same term
dimethylarginine Space-division multiple access, a channel access method used in communication Soft direct memory access, a type of direct memory access (DMA) specific
SDMA
Behaviour of travelling radio waves
propagation include: Models for free space attenuation Free-space path loss Dipole field strength in free space Friis transmission equation Models for
Radio_propagation
Area dedicated to radio transmitting
to access the top of, and may collect and drop large amounts of ice in winter, or even collapse in a severe ice storm and/or high winds. Multiple small
Antenna_farm
Antenna used with a television to receive television programs
to reduce this problem. For side-by-side placement of multiple antennas, as is common in a space of limited height such as an attic, they should be separated
Television_antenna
Device that transmits and receives radio waves
reception. It is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter
Antenna_(radio)
Receiving device on satellite dishes
LNB. Two cables minimum are needed to access all channels. In the Sky Q box, multiple tuners can select multiple channels, more than the usual two for
Low-noise_block_downconverter
cells use the same frequency spectrum. Such standards exploit Space Division Multiple Access (SDMA) and can thus be highly efficient in terms of spectrum
Radio_resource_management
Two-conductor flat cable used to carry radio frequency signals
largely replaced with 75 Ω coaxial cable for television installations. Multiple forms of parallel wire line are used in amateur radio stations as feedline
Twin-lead
Wi-Fi access point
A hotspot is a physical location where people can obtain Internet access, typically using Wi-Fi technology, via a wireless local-area network (WLAN) using
Wi-Fi_hotspot
Lobes of far field radiation pattern of antenna
visible space. Larger antennas have narrower main beams, as well as narrower sidelobes. Hence, larger antennas have more sidelobes in the visible space (as
Sidelobes
High bandwidth channel access method
WSDMA (Wideband Space Division Multiple Access) is a high bandwidth channel access method, developed for multi-transceiver systems such as active array
WSDMA
Parameter characterizing an AC conductor
air, so the free space wavelength of the wave is λ 0 = c / f {\displaystyle \lambda _{\text{0}}=c/f} . (in this article free space variables are distinguished
Electrical_length
Satellite-provided Internet
being developed in low-earth orbit to enable low-latency internet access from space. Following the launch of the first satellite, Sputnik 1, by the Soviet
Satellite_Internet_access
Characteristic of a radio antenna
relationship between the electric and magnetic fields, see the impedance of free space. For a 50 Ω load, knowing that PD Ae = Pr = V2/R and E2= μ 0 ε 0 {\displaystyle
Antenna_factor
a city block. Instead of a cell tower, each cell will use an array of multiple small antennas mounted on existing buildings and utility poles. In general
Wireless device radiation and health
Wireless_device_radiation_and_health
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
Telecommunications device
matching is done at both ends of the line. If there is still a high SWR (multiple reflections) in the feedline beyond the ATU, any loss in the feedline is
Antenna_tuner
Antenna capable of modifying its frequency and radiation properties dynamically
in situations where several communications systems converge because the multiple antennas required can be replaced by a single reconfigurable antenna. Frequency
Reconfigurable_antenna
Cable or conductor connecting a radio transmitter to an antenna
noise. At frequencies above 20 MHz atmospheric noise radiates freely into space, and so is low enough in received signals that it approaches the level of
Antenna_feed
Type of radio antenna consisting of a loop or coil
to the loop antenna's first resonance. At that frequency, one whole free-space wavelength is slightly smaller than the perimeter of the loop, which is
Loop_antenna
Type of electrical resistance from an antenna
antenna. This is because the monopole radiates only into half the space, the space above the plane, so the radiation pattern is identical to half of the
Radiation_resistance
Multiplexing technique for digital signals
on a per-sample basis TDM can be further extended into the time-division multiple access (TDMA) scheme, where several stations connected to the same physical
Time-division_multiplexing
multiple directions, as the cost of a rotator is often significantly less than that of installing a second antenna to receive stations from multiple directions
Antenna_rotator
2015 space flight simulation video game
released digitally on Squad's Kerbal Space Program storefront on 24 June 2011, and joined Steam's early access program on 20 March 2013. The game was
Kerbal_Space_Program
Device used in the transmission of satellite signals
both a BUC and an LNB is a VSAT system, used for bidirectional Internet access via satellite. The block upconverter is a block shaped device assembled
Block_upconverter
Air interface for 4G and 5G broadband wireless communications
other popular air interfaces such as time-division multiple access (TDMA) and code-division multiple access (CDMA), the combination of MIMO and OFDM is
MIMO-OFDM
Void between celestial bodies
humanity in space is an issue of human access to and presence in space ever since the beginning of spaceflight. Different space agencies, space programs
Outer_space
U.S. Space Force space development, acquisition, launch, and logistics field command
the Space Division and divested itself of ballistic missile development. In 1989, the Space Division returned to its historic name of the Space Systems
Space_Systems_Command
are needed just as in visible sky viewing. Array gain is achieved using multiple, even dozens of radio receivers to collect as much signal as possible.
Array_gain
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
American spaceflight and AI company
Starbase development site in Starbase, Texas. The company operates 3 divisions: "Space", which conducts more orbital launches annually than any other launch
SpaceX
SpaceX satellite series for government customers
Starshield is a division of SpaceX's Starlink subsidiary creating purpose-built low-Earth-orbit (LEO) satellites designed to provide new military space capabilities
SpaceX_Starshield
Division of Airbus
Airbus Defence and Space is the military and space systems division of Airbus. It was formed in 2014 during the restructuring of the European Aeronautic
Airbus_Defence_and_Space
Space service branch of the U.S. military
space:" Space superiority (in space) Global mission operations (from space) Assured space access (to space) Space superiority defends against space and
United_States_Space_Force
Mobile telecommunications technology
given spectral space, compared to analog cellular and two-way radio systems, by using speech compression and time-division multiple access (TDMA). The iDEN
IDEN
Linked hypertext system on the Internet
immediate access to other web resources. Web navigation, or web surfing, is the common practice of following such hyperlinks across multiple websites.
World_Wide_Web
simultaneously with multiple user's receiver (each having one or multiple antennas). This is known as space-division multiple access (SDMA). From an implementation
Precoding
First CDMA-based digital cellular technology
Telecommunications Industry Association (TIA). cdmaOne used code-division multiple access (CDMA), a multiple access scheme for digital radio, to send voice, data and
CdmaOne
SpaceX satellite Internet constellation
satellite division was focusing on the significant business challenge of achieving a sufficiently low-cost design for the user equipment. SpaceX President
Starlink
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
Multiple-input multiple-output (MIMO) Beamforming Diversity combining Diversity scheme Space–time code Spatial multiplexing Space-division multiple access (SDMA)
3G_MIMO
Method of encoding digital data on multiple carrier frequencies
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
engine, a new beamforming algorithm and a new antenna array. New space-division multiple access (SDMA) engine: multi-user MIMO, network MIMO, coordinate multi-point
Many_antennas
Voting whilst in space
during spaceflight. Voting from space has some inherent difficulties, as delivering paper ballots to and from a space station—as one would do for a soldier
Voting_in_space
Method in wireless communication systems
A space–time code (STC) is a method employed to improve the reliability of data transmission in wireless communication systems using multiple transmit
Space–time_code
Citizenship in multiple countries held by the same person
Multiple citizenship (or multiple nationality) is a person's legal status in which a person is at the same time recognized by more than one country under
Multiple_citizenship
American space and aeronautics agency
in space grew out of its rocketry program at the Pilotless Aircraft Research Division. The Soviet Union's launch of Sputnik 1 ushered in the Space Age
NASA
2G mobile-phone standard that uses time-division multiple access
The name TDMA is based on the abbreviation for time-division multiple access, a common multiple access technique which is used in most 2G standards, including
Digital_AMPS
landline numbers are at most 8 digits long. Due to the availability of multiple operators offering fixed-line (landline) services (either wired or wireless)
Telephone_numbers_in_India
Habitable artificial satellite
Space-Station Resupply Vehicle (HTV-X) Roscosmos Progress (multiple variants) (2000–present) Energia Soyuz (multiple variants) (2001–present) SpaceX
Space_station
microwave links. These links are spaced at about 30 km. Some of these links (the ones serving smaller towns) are spaced at 60 km and this makes communications
Communications_in_Argentina
NASA/ESA space telescope launched in 1990
The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the
Hubble_Space_Telescope
NASA/ESA/CSA space telescope launched in 2021
The James Webb Space Telescope (JWST) is a space telescope designed to conduct infrared astronomy. It is the largest telescope in space, and is equipped
James_Webb_Space_Telescope
Broadband network architecture term
eavesdropping. Upstream signals are combined using a multiple-access protocol, usually time-division multiple access (TDMA). Point-to-Point Protocol over Ethernet
Fiber_to_the_x
Communications method involving a one-to-many connection
CSMA/CA medium access control protocol. The negative impact of the hidden node problem can be mitigated using a time-division multiple access (TDMA) based
Point-to-multipoint communication
Point-to-multipoint_communication
lifted and multiple towns may now share an area code. The following table lists only one town for each area code, and it includes the trunk access code (0)
Telephone numbers in the Netherlands
Telephone_numbers_in_the_Netherlands
posted by a human proxy.) This personal Web access, which NASA calls the Crew Support LAN, uses the space station's high-speed Ku band microwave link
History_of_the_Internet
Space bioscience research platform
GeneLab is an open-access, collaborative analysis platform for space bioscience research. GeneLab aims to maximize the research resulting from experiments
GeneLab
Early packet switching network (1969–1990)
Department of Defense made it standard for all military computer networking. Access to the ARPANET was expanded in 1981 when the National Science Foundation
ARPANET
Canadian space technology company
RADARSAT-2 Earth observation satellite. In March 1999, MDA bought the space robotics division of Spar Aerospace, manufacturer of the Canadarm, and renamed it
MDA_Space
2021–present reorganization of forces
transformation of the United States Army aims to integrate cyberspace, space satellite operations, land, maritime, and air operations more closely together
Transformation of the United States Army
Transformation_of_the_United_States_Army
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
American armored self-propelled artillery
The M270 Multiple Launch Rocket System (M270 MLRS) is an American armored self-propelled multiple launch rocket system. The US Army variant of the M270
M270 Multiple Launch Rocket System
M270_Multiple_Launch_Rocket_System
Type of low-noise block downconverter
solution overcoming this obstacle may lead to designs of large matrices of multiple LNBs tightly packed into a single monoblock LNB receiver. Another limiting
Monoblock_LNB
Concept of collecting solar power in outer space and distributing it to Earth
Space-based solar power (SBSP or SSP) is the concept of collecting solar power in outer space with solar power satellites (SPS) and distributing it to
Space-based_solar_power
Signal processing technique in telecommunications
frequency-division multiplexing is used as to allow multiple users to share a physical communications channel, it is called frequency-division multiple access (FDMA)
Frequency-division multiplexing
Frequency-division_multiplexing
Individual connection to the Internet
Ethernet's multiple access technologies". July 2009. Cuffie, D.; Biesecker, K.; Kain, C.; Charleston, G.; Ma, J. (1999). "Emerging high-speed access technologies"
Internet_access
Satellite communication system with small dish antenna
This changed when the company iDirect launched its IP-based time-division multiple access technology that dynamically allocated bandwidth to each ship for
Very-small-aperture_terminal
New Zealand-based independent video game development studio
the development freeze of Kerbal Space Program 2 following the sale of Private Division by Take-Two Interactive. Multiple KSA developers were previously
RocketWerkz
Transmission of information electromagnetically
be used to send multiple streams of information simultaneously. For example, one radio station can broadcast radio waves into free space at frequencies
Telecommunications
Form of broadband Internet access
In telecommunications, cable Internet access, shortened to cable Internet, is a form of broadband internet access which uses the same infrastructure as
Cable_Internet_access
SPACE DIVISION-MULTIPLE-ACCESS
SPACE DIVISION-MULTIPLE-ACCESS
Boy/Male
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sindhi, Telugu
Limitless Space
Boy/Male
Hindu
Space
Boy/Male
Hindu, Indian
Space; Outer Space; Sky
Boy/Male
Australian, Vietnamese
Many; Multiple
Girl/Female
Indian, Telugu
Space
Surname or Lastname
English
English : from a vernacular short form of the Latin personal name Paschalis (see Pascal, Italian Pasquale).nickname for a mild-mannered and peaceable person, from Middle English pace, pece ‘peace’, ‘concord’, ‘amity’ (via Anglo-Norman French from Latin pax, genitive pacis).Italian : from the medieval personal name Pace, used for both men and women, from the word pace ‘peace’ (see 1).
Boy/Male
Hindu
Space
Boy/Male
Tamil
Antrix | அஂதà¯à®°à¯€à®•à¯à®·
Space
Antrix | அஂதà¯à®°à¯€à®•à¯à®·
Male
English
English surname transferred to forename use, derived from the French personal name Pascal, PACE means "Passover; Easter."
Boy/Male
Hindu, Indian, Tamil
Multiple
Girl/Female
Tamil
Antariksha | அஂதரிகà¯à®·
Space, Sky
Antariksha | அஂதரிகà¯à®·
Girl/Female
Hindu, Indian, Marathi
Space; Sky
Boy/Male
Hindu
Space
Girl/Female
Indian, Japanese, Tamil
Space; Star
Girl/Female
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Tamil, Telugu
Space; Sky
Surname or Lastname
English
English : nickname for a frugal person, from Middle English spare ‘sparing’, ‘frugal’.
Surname or Lastname
English or Scottish
English or Scottish : unexplained.
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Space; Universe
Boy/Male
Tamil
Antariksh | அஂதரிகà¯à®·
Space
Antariksh | அஂதரிகà¯à®·
Boy/Male
Tamil
Antareeksh | அஂதரீகà¯à®·
Space
SPACE DIVISION-MULTIPLE-ACCESS
SPACE DIVISION-MULTIPLE-ACCESS
Boy/Male
Biblical
The strength, or taking, of the Lord.
Boy/Male
Greek
Lover of horses.
Boy/Male
Basque, Biblical, French, German, Hebrew
A Flock; Herd
Female
English
Variant spelling of English Brittany, BRITTNEY means "little Britain."
Boy/Male
Tamil
Name of Lord Vishnu
Boy/Male
Muslim
Bright, Shining, Sparkling, Luminous
Boy/Male
Arabic
Two Bright Stars Near the Pole; Beta and Gama in Ursa Minor
Boy/Male
Indian
Strong; Big
Boy/Male
Hindu
Cheerful, Seventh note on indian musical scale, Awesome
Boy/Male
Gaelic Irish
Spear.
SPACE DIVISION-MULTIPLE-ACCESS
SPACE DIVISION-MULTIPLE-ACCESS
SPACE DIVISION-MULTIPLE-ACCESS
SPACE DIVISION-MULTIPLE-ACCESS
SPACE DIVISION-MULTIPLE-ACCESS
v. t.
To dig with a spade; to pare off the sward of, as land, with a spade.
a.
Manifold; multiple.
n.
Space.
a.
Having many flues; as, a multiflue boiler. See Boiler.
n.
One who, or that which, multiplies or increases number.
imp. & p. p.
of Multiply
v. t.
Held in reserve, to be used in an emergency; as, a spare anchor; a spare bed or room.
n.
The number by which another number is multiplied; a multiplier.
a.
Indicating division or distribution.
n.
One who divides or makes division.
n.
A quantity or portion of extension; distance from one thing to another; an interval between any two or more objects; as, the space between two stars or two hills; the sound was heard for the space of a mile.
imp. & p. p.
of Space
n.
Vision.
n.
To arrange or adjust the spaces in or between; as, to space words, lines, or letters.
a.
Creating, or tending to create, division, separation, or difference.
n.
The number by which another number is multiplied. See the Note under Multiplication.
n.
Cutting off; division; detachment of a part.
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.
a.
That divides; pertaining to, making, or noting, a division; as, a divisional line; a divisional general; a divisional surgeon of police.
v. t.
To season with spice, or as with spice; to mix aromatic or pungent substances with; to flavor; to season; as, to spice wine; to spice one's words with wit.