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 spark-gap transmitter (top) and receiver (bottom) comprised the first wireless telegraphy. Used to tap out Morse code, the spark between the two electrodes generated a mass of radio frequencies that were tuned to the desired frequency, and the current was strong enough to go a long distance. Later, oscillators generated the frequencies, and amplifiers boosted output. (Equipment courtesy of Vintage Radio and Communications Museum of Connecticut, www.vrcmct.org)


The First Air Interface
In the early 1900s, this Marconi spark-gap transmitter (top) and receiver (bottom) comprised the first wireless telegraphy. Used to tap out Morse code, the spark between the two electrodes generated a mass of radio frequencies that were tuned to the desired frequency, and the current was strong enough to go a long distance. Later, oscillators generated the frequencies, and amplifiers boosted output. (Equipment courtesy of Vintage Radio and Communications Museum of Connecticut, www.vrcmct.org)
References in periodicals archive ?
* These waveforms will be integrated in a unified air interface. Multiple waveforms are candidates but it is still difficult to say which ones will be selected in the end.
The Imperfect Air Interface. In the UHF RFID system, as other passive RFID systems, tag collision resolution is based on the request/response model.
For example, during summer, a smaller batch size would minimize the amount of time mixed sand is exposured to ambient humidity, and the sand would be used up prior to a significant decrease in core tensile strength, If possible, minimizing the surface area at the mixed sand and air interface will decrease solvent evaporation and the reaction of the isocyanate and moisture.
The 802.16 air interface standard is expected to form the basis of a global industry connecting buildings to public networks for data, voice, and video access without cables.
JUPITER also features a flexible and robust gateway architecture with lights-out operation, enhanced IPoS air interface for bandwidth efficiency and performance, as well as high-throughput terminals.
After years of research, Huawei has developed an adaptive and software-defined air interface architecture that uses technologies including Sparse Code Multiple Access (SCMA), Filtered-Orthogonal Frequency Division Multiplexing (F-OFDM), and polar coding.
new air interface techniques, networking techniques and network architectures
* Five-year subscriptions forecasts by air interface technology, data protocol, region, country and operator
ASOCS, Rosh Ha'Ayin, Israel, a developer of wireless Multi- Communication processors and system solutions for handheld devices has launched the MP100, the world's first wireless MultiComms processor capable of running up to three wireless air interfaces concurrently.
With the introduction of HSDPA, significant aspects of the management of the air interface have been moved from the radio network controller (RNC) down into the base station or Node B in 3G terminology.
The PROPSim (FE) fading emulator is an air interface emulator for testing 2/2.5/3/3.5G (GSM, GPRS, EDGE, CDMA, CDMA2000, WCDMA, WLAN) wireless networks, terminals and chipsets.
Each PA module in the family features 50[OMEGA] input and output matching and is designed to be compliant with CDMA 15-95, CDMA2000 1x and CDMA2000 lx EV-DO air interface standards.