A CDE Definition
See air interface.
The technology used for the radio transmission between mobile devices and the base station in a cellular network. It is the wireless counterpart of the physical layer 1 in the OSI model (see OSI model).
Also called a "radio interface," the air interface defines the frequency, channel bandwidth and modulation scheme. For example, TDMA and CDMA modulation are used in GSM and CDMA cellular networks respectively, while OFDMA is used for LTE. OFDMA was also used for WiMAX. See air card, CDMA, TDMA, OFDMA, LTE and WiMAX.
The First Air Interface
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