# AMC - Adaptive Modulation and Coding Link adaptation, comprising [[AMC - Adaptive Modulation and Coding]] and others (such as Power Control), 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, [[WiMAX - Worldwide Interoperability for Microwave Access|WiMAX]] 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 [[HSDPA - High-Speed Downlink Packet Access]] in [[UMTS - Universal Mobile Telecommunications Service]] this can take place every 2 ms.