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Frequency-division_multiple_access abstract "Frequency Division Multiple Access or FDMA is a channel access method used in multiple-access protocols as a channelization protocol. FDMA gives users an individual allocation of one or several frequency bands, or channels. It is particularly commonplace in satellite communication. FDMA, like other Multiple Access systems, coordinates access between multiple users. Alternatives include TDMA, CDMA, or SDMA. These protocols are utilized differently, at different levels of the theoretical OSI model. Disadvantage: Crosstalk may cause interference among frequencies and disrupt the transmission. In FDMA all users share the satellite transponder or frequency channel simultaneously but each user transmits at single frequency. FDMA can be used with both analog and digital signal. FDMA requires high-performing filters in the radio hardware, in contrast to TDMA and CDMA. FDMA is not vulnerable to the timing problems that TDMA has. Since a predetermined frequency band is available for the entire period of communication, stream data (a continuous flow of data that may not be packetized) can easily be used with FDMA. Due to the frequency filtering, FDMA is not sensitive to near-far problem which is pronounced for CDMA. Each user transmits and receives at different frequencies as each user gets a unique frequency slots.FDMA is distinct from frequency division duplexing (FDD). While FDMA allows multiple users simultaneous access to a transmission system, FDD refers to how the radio channel is shared between the uplink and downlink (for instance, the traffic going back and 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 that combines and transmits low-bandwidth channels through a high-bandwidth channel. FDMA, on the other hand, is an access method in the data link layer.FDMA also supports demand assignment in addition to fixed assignment. Demand assignment allows all users apparently continuous access of the radio spectrum by assigning carrier frequencies on a temporary basis using a statistical assignment process. The first FDMA demand-assignment system for satellite was developed by COMSAT for use on the Intelsat series IVA and V satellites.There are two main techniques:Multi-channel per-carrier (MCPC)Single-channel per-carrier (SCPC)".
Frequency-division_multiple_access wikiPageID "201958".
Frequency-division_multiple_access wikiPageLength "3071".
Frequency-division_multiple_access wikiPageOutDegree "28".
Frequency-division_multiple_access wikiPageRevisionID "616229117".
Frequency-division_multiple_access wikiPageWikiLink CDMA.
Frequency-division_multiple_access wikiPageWikiLink COMSAT.
Frequency-division_multiple_access wikiPageWikiLink Channel_(communications).
Frequency-division_multiple_access wikiPageWikiLink Channel_access_method.
Frequency-division_multiple_access wikiPageWikiLink Code_division_multiple_access.
Frequency-division_multiple_access wikiPageWikiLink Communications_satellite.
Frequency-division_multiple_access wikiPageWikiLink Crosstalk.
Frequency-division_multiple_access wikiPageWikiLink Data_link_layer.
Frequency-division_multiple_access wikiPageWikiLink Demand_assignment.
Frequency-division_multiple_access wikiPageWikiLink Downlink.
Frequency-division_multiple_access wikiPageWikiLink Duplex_(telecommunications).
Frequency-division_multiple_access wikiPageWikiLink Frequency-division_multiplexing.
Frequency-division_multiple_access wikiPageWikiLink Frequency_band.
Frequency-division_multiple_access wikiPageWikiLink Frequency_channel.
Frequency-division_multiple_access wikiPageWikiLink Frequency_division_duplexing.
Frequency-division_multiple_access wikiPageWikiLink GSM.
Frequency-division_multiple_access wikiPageWikiLink Intelsat.
Frequency-division_multiple_access wikiPageWikiLink MCPC.
Frequency-division_multiple_access wikiPageWikiLink Mobile_phone_base_station.
Frequency-division_multiple_access wikiPageWikiLink Multiplexing.
Frequency-division_multiple_access wikiPageWikiLink Near-far_problem.
Frequency-division_multiple_access wikiPageWikiLink OSI_model.
Frequency-division_multiple_access wikiPageWikiLink Radio_spectrum.
Frequency-division_multiple_access wikiPageWikiLink SCPC.
Frequency-division_multiple_access wikiPageWikiLink Satellite_communication.
Frequency-division_multiple_access wikiPageWikiLink Single_channel_per_carrier.
Frequency-division_multiple_access wikiPageWikiLink Space-division_multiple_access.
Frequency-division_multiple_access wikiPageWikiLink Telecommunications_link.
Frequency-division_multiple_access wikiPageWikiLink Time_division_multiple_access.
Frequency-division_multiple_access wikiPageWikiLink Transponder_(satellite_communications).
Frequency-division_multiple_access wikiPageWikiLink Uplink.
Frequency-division_multiple_access wikiPageWikiLinkText "FDMA".
Frequency-division_multiple_access wikiPageWikiLinkText "Frequency Division Multiple Access".
Frequency-division_multiple_access wikiPageWikiLinkText "Frequency-division multiple access".
Frequency-division_multiple_access wikiPageWikiLinkText "frequency-division multiple access".
Frequency-division_multiple_access wikiPageWikiLinkText "frequency-division".
Frequency-division_multiple_access hasPhotoCollection Frequency-division_multiple_access.
Frequency-division_multiple_access wikiPageUsesTemplate Template:Channel_access_methods.
Frequency-division_multiple_access wikiPageUsesTemplate Template:One_source.
Frequency-division_multiple_access wikiPageUsesTemplate Template:Reflist.
Frequency-division_multiple_access wikiPageUsesTemplate Template:Telecommunications.
Frequency-division_multiple_access hypernym Method.
Frequency-division_multiple_access type Article.
Frequency-division_multiple_access type Software.
Frequency-division_multiple_access type Article.
Frequency-division_multiple_access type Method.
Frequency-division_multiple_access comment "Frequency Division Multiple Access or FDMA is a channel access method used in multiple-access protocols as a channelization protocol. FDMA gives users an individual allocation of one or several frequency bands, or channels. It is particularly commonplace in satellite communication. FDMA, like other Multiple Access systems, coordinates access between multiple users. Alternatives include TDMA, CDMA, or SDMA.".
Frequency-division_multiple_access label "Frequency-division multiple access".
Frequency-division_multiple_access sameAs FDMA.
Frequency-division_multiple_access sameAs FDMA.
Frequency-division_multiple_access sameAs Frequenzmultiplexverfahren.
Frequency-division_multiple_access sameAs Acceso_múltiple_por_división_de_frecuencia.
Frequency-division_multiple_access sameAs Sagedusjaotusega_hulgipöördus.
Frequency-division_multiple_access sameAs تقسیم_فرکانس_با_دسترسی_چندگانه.
Frequency-division_multiple_access sameAs FDMA.
Frequency-division_multiple_access sameAs Accès_multiple_par_répartition_en_fréquence.
Frequency-division_multiple_access sameAs Frequency-division_multiple_access.
Frequency-division_multiple_access sameAs 周波数分割多元接続.
Frequency-division_multiple_access sameAs FDMA.
Frequency-division_multiple_access sameAs FDMA.
Frequency-division_multiple_access sameAs m.01cprt.
Frequency-division_multiple_access sameAs FDMA.
Frequency-division_multiple_access sameAs FDMA.
Frequency-division_multiple_access sameAs Q844071.
Frequency-division_multiple_access sameAs Q844071.
Frequency-division_multiple_access sameAs 频分多址.
Frequency-division_multiple_access wasDerivedFrom Frequency-division_multiple_access?oldid=616229117.
Frequency-division_multiple_access isPrimaryTopicOf Frequency-division_multiple_access.