Space-division multiple access (SDMA) is a channel access method based on creating parallel spatial pipes (focused signal beams) using advanced antenna technology 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 (where multiple users may need to use the communication media simultaneously).[1] 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 method 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.
^"What is Spatial Division Multiple Access (SDMA)? - Definition from Techopedia". Techopedia.com. Retrieved 2019-11-20.
December 14, 2023
space, division, multiple, access, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar,. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Space division multiple access news newspapers books scholar JSTOR July 2016 Learn how and when to remove this template message For other uses see Space Division Space division multiple access SDMA is a channel access method based on creating parallel spatial pipes focused signal beams using advanced antenna technology 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 where multiple users may need to use the communication media simultaneously 1 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 method 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 See also editCo channel interference Multi user MIMO MU MIMO History of smart antennasReferences edit What is Spatial Division Multiple Access SDMA Definition from Techopedia Techopedia com Retrieved 2019 11 20 Retrieved from https en wikipedia org w index php title Space division multiple access amp oldid 1152845305, wikipedia, wiki, book, books, library,
