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- Link_adaptation abstract "Link adaptation, or adaptive modulation and coding (AMC), is a term used in wireless communications to denote the matching of the modulation, coding and other signal and protocol parameters to the conditions on the radio link (e.g. the pathloss, the interference due to signals coming from other transmitters, the sensitivity of the receiver, the available transmitter power margin, etc.). For example, EDGE uses a rate adaptation algorithm that adapts the modulation and coding scheme (MCS) according to the quality of the radio channel, and thus the bit rate and robustness of data transmission. The process of link adaptation is a dynamic one and the signal and protocol parameters change as the radio link conditions change -- for example in High-Speed Downlink Packet Access (HSDPA) in Universal Mobile Telecommunications System (UMTS) this can take place every 2 ms.Adaptive modulation systems invariably require some channel state information at the transmitter. This could be acquired in time division duplex systems by assuming the channel from the transmitter to the receiver is approximately the same as the channel from the receiver to the transmitter. Alternatively, the channel knowledge can also be directly measured at the receiver, and fed back to the transmitter. Adaptive modulation systems improve rate of transmission, and/or bit error rates, by exploiting the channel state information that is present at the transmitter. Especially over fading channels which model wireless propagation environments, adaptive modulation systems exhibit great performance enhancements compared to systems that do not exploit channel knowledge at the transmitter.".
- Link_adaptation wikiPageID "2321017".
- Link_adaptation wikiPageRevisionID "572981513".
- Link_adaptation hasPhotoCollection Link_adaptation.
- Link_adaptation subject Category:Error_detection_and_correction.
- Link_adaptation subject Category:Quantized_radio_modulation_modes.
- Link_adaptation subject Category:Radio_resource_management.
- Link_adaptation type Artifact100021939.
- Link_adaptation type Instrumentality103575240.
- Link_adaptation type Medium106254669.
- Link_adaptation type Object100002684.
- Link_adaptation type PhysicalEntity100001930.
- Link_adaptation type Telecommunication106271778.
- Link_adaptation type Telecommunications.
- Link_adaptation type Whole100003553.
- Link_adaptation comment "Link adaptation, or adaptive modulation and coding (AMC), is a term used in wireless communications to denote the matching of the modulation, coding and other signal and protocol parameters to the conditions on the radio link (e.g. the pathloss, the interference due to signals coming from other transmitters, the sensitivity of the receiver, the available transmitter power margin, etc.).".
- Link_adaptation label "Adaptación de enlace".
- Link_adaptation label "Adaptative Modulation and Coding".
- Link_adaptation label "Link adaptation".
- Link_adaptation label "自適應調變和編碼".
- Link_adaptation label "適応変調".
- Link_adaptation sameAs Adaptación_de_enlace.
- Link_adaptation sameAs Adaptative_Modulation_and_Coding.
- Link_adaptation sameAs 適応変調.
- Link_adaptation sameAs m.073m5j.
- Link_adaptation sameAs Q2714551.
- Link_adaptation sameAs Q2714551.
- Link_adaptation sameAs Link_adaptation.
- Link_adaptation wasDerivedFrom Link_adaptation?oldid=572981513.
- Link_adaptation isPrimaryTopicOf Link_adaptation.