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- Space-division_multiple_access abstract "Space-division multiple access (SDMA) is a channel access method based on creating parallel spatial pipes next to higher capacity pipes through spatial multiplexing and/or diversity, by which it is able to offer superior performance in radio multiple access communication systems. In traditional mobile cellular network systems, the base station has no information on the position of the mobile units within the cell and radiates the signal in all directions within the cell in order to provide radio coverage. This results in wasting power on transmissions when there are no mobile units to reach, in addition to causing interference for adjacent cells using the same frequency, so called co-channel cells. Likewise, in reception, the antenna receives signals coming from all directions including noise and interference signals. By using smart antenna technology and differing spatial locations of mobile units within the cell, space-division multiple access techniques offer attractive performance enhancements. The radiation pattern of the base station, both in transmission and reception, is adapted to each user to obtain highest gain in the direction of that user. This is often done using phased array techniques.In GSM cellular networks, the base station is aware of the distance (but not direction) of a mobile phone by use of a technique called "timing advance" (TA). The base transceiver station (BTS) can determine how distant the mobile station (MS) is by interpreting the reported TA. This information, along with other parameters, can then be used to power down the BTS or MS, if a power control feature is implemented in the network. The power control in either BTS or MS is implemented in most modern networks, especially on the MS, as this ensures a better battery life for the MS. This is also why having a BTS close to the user results in less exposure to electromagnetic radiation.This is why one may actually be safer to have a BTS close to them as their MS will be powered down as much as possible. For example, there is more power being transmitted from the MS than what one would receive from the BTS even if they were 6 meters away from a BTS mast. However, this estimation might not consider all the Mobile stations that a particular BTS is supporting with EM radiation at any given time.In the same manner, 5th generation mobile networks will be focused in utilizing the given position of the MS in relation to BTS in order to focus all MS Radio frequency power to the BTS direction and vice versa, thus enabling power savings for the Mobile Operator, reducing MS SAR index, reducing the EM field around base stations since beamforming will concentrate rf power when it will be actually used rather than spread uniformly around the BTS, reducing health and safety concerns, enhancing spectral efficiency, and decreased MS battery consumption.".
- Space-division_multiple_access wikiPageID "381917".
- Space-division_multiple_access wikiPageLength "3439".
- Space-division_multiple_access wikiPageOutDegree "18".
- Space-division_multiple_access wikiPageRevisionID "641223593".
- Space-division_multiple_access wikiPageWikiLink 5G.
- Space-division_multiple_access wikiPageWikiLink Antenna_(radio).
- Space-division_multiple_access wikiPageWikiLink Base_station.
- Space-division_multiple_access wikiPageWikiLink Base_transceiver_station.
- Space-division_multiple_access wikiPageWikiLink Cellular_network.
- Space-division_multiple_access wikiPageWikiLink Co-channel.
- Space-division_multiple_access wikiPageWikiLink Co-channel_interference.
- Space-division_multiple_access wikiPageWikiLink Electromagnetic_field.
- Space-division_multiple_access wikiPageWikiLink GSM.
- Space-division_multiple_access wikiPageWikiLink Mobile_phone_operator.
- Space-division_multiple_access wikiPageWikiLink Phased_array.
- Space-division_multiple_access wikiPageWikiLink Radiation_pattern.
- Space-division_multiple_access wikiPageWikiLink Smart_antenna.
- Space-division_multiple_access wikiPageWikiLink Specific_absorption_rate.
- Space-division_multiple_access wikiPageWikiLink Spectral_efficiency.
- Space-division_multiple_access wikiPageWikiLink Timing_advance.
- Space-division_multiple_access wikiPageWikiLinkText ""Space-Division Multiple Access"".
- Space-division_multiple_access wikiPageWikiLinkText "SDMA".
- Space-division_multiple_access wikiPageWikiLinkText "Space Division Multiple Access (SDMA)".
- Space-division_multiple_access wikiPageWikiLinkText "Space division multiple access".
- Space-division_multiple_access wikiPageWikiLinkText "Space-division multiple access (SDMA)".
- Space-division_multiple_access wikiPageWikiLinkText "Space-division multiple access".
- Space-division_multiple_access wikiPageWikiLinkText "space-division multiple access".
- Space-division_multiple_access hasPhotoCollection Space-division_multiple_access.
- Space-division_multiple_access wikiPageUsesTemplate Template:Channel_access_methods.
- Space-division_multiple_access wikiPageUsesTemplate Template:Unreferenced.
- Space-division_multiple_access wikiPageUsesTemplate Template:What.
- Space-division_multiple_access hypernym Method.
- Space-division_multiple_access type Article.
- Space-division_multiple_access type Software.
- Space-division_multiple_access type Article.
- Space-division_multiple_access type Method.
- Space-division_multiple_access comment "Space-division multiple access (SDMA) is a channel access method based on creating parallel spatial pipes next to higher capacity pipes through spatial multiplexing and/or diversity, by which it is able to offer superior performance in radio multiple access communication systems.".
- Space-division_multiple_access label "Space-division multiple access".
- Space-division_multiple_access sameAs Accxc3xa9s_mxc3xbaltiple_per_divisixc3xb3_despai.
- Space-division_multiple_access sameAs Acceso_múltiple_por_división_de_espacio.
- Space-division_multiple_access sameAs Space_division_multiple_access.
- Space-division_multiple_access sameAs SDMA.
- Space-division_multiple_access sameAs m.021q40.
- Space-division_multiple_access sameAs Space_Division_Multiple_Access.
- Space-division_multiple_access sameAs Q3494197.
- Space-division_multiple_access sameAs Q3494197.
- Space-division_multiple_access wasDerivedFrom Space-division_multiple_access?oldid=641223593.
- Space-division_multiple_access isPrimaryTopicOf Space-division_multiple_access.