air interface


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Related to air interface: WCDMA

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
In the early 1900s, this Marconi transmitter (top) and receiver (bottom) were the first wireless telegraphy systems. Used to tap out Morse code, the device at the top created a spark in the gap between two electrodes. It generated a mass of radio frequencies that were filtered (tuned) to the desired frequency, and the spark current was strong enough to go a long distance. Later, oscillators and amplifiers were invented to generate the frequencies and boost the output. (Equipment courtesy of Vintage Radio and Communications Museum of Connecticut, www.vrcmct.org)


The First Air Interface
In the early 1900s, this Marconi transmitter (top) and receiver (bottom) were the first wireless telegraphy systems. Used to tap out Morse code, the device at the top created a spark in the gap between two electrodes. It generated a mass of radio frequencies that were filtered (tuned) to the desired frequency, and the spark current was strong enough to go a long distance. Later, oscillators and amplifiers were invented to generate the frequencies and boost the output. (Equipment courtesy of Vintage Radio and Communications Museum of Connecticut, www.vrcmct.org)
References in periodicals archive ?
Huawei today announced that it will reveal a series of new 5G-oriented air interface technologies at the Mobile World Congress (MWC) 2015.
Exhibit 16: Huawei Global Base Station Contracts by Air Interface, Q4 08
Exhibit 31: North America Contract Awards by Air Interface, Q1 2009
Exhibit 17: Motorola Global Base Station Contracts by Air Interface, Q2 2009 18
The process of mixing promotes solvent evaporation due to constant renewal of the surface at the mixed sand and air interface.
Finnish telecomms solutions provider Nokia announced on Tuesday (10 May) that it would make the air interface specifications of the Nokia mobile TV solution publicly available for interested parties.
Spectrum Femtocell LTE Air Interface Scheduler is compliant with the new Femto Forum APIs for air interface scheduling and network monitoring and is optimised for use in low cost Femtocells, in uncoordinated high volume deployment scenarios.
Five-year subscriptions forecasts by air interface technology, data protocol, region, country and operator
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Table 1: Global TRx Market Share by Air Interface, 2008 (Units) 10
This report covers air interface standards including: GSM850, GSM900, GSM1800, GSM1900, WCDMA850, WCDMA900, WCDMA1500, WCDMA1900, WCDMA2100, WCDMA2100AWS, WCDMA2100 Japan, CDMA800, CDMA1900, LTE700, LTE2600.