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 ?
considered next-generation air interfaces to be the most fundamental.
Figure: Worldwide Smartphone Shipment Share by Air Interface, 4Q12 and 4Q13
Exhibit 18: Motorola Global Base Station Contracts by Air Interface, Q4 08
Founded in 2006, Rayspan is the world's leading innovator of metamaterial air interface solutions for wireless communications.
Exhibit 17: Motorola Global Base Station Contracts by Air Interface, Q2 2009 18
Actual Shipments 14 Exhibit 3: Global TRx Shipments, 2012-2013 (Units) 14 Exhibit 4: Global TRx Market Share by Air Interface, 2013 (Units) 16 Exhibit 5: Global TRx Market Share by Technology Generation, 2013 (Units) 17 Exhibit 6: Global UMTS TRx Market Share by Technology, 2013 (Units) 17 Exhibit 7: Global TRx Market Share by Air Interface, 2012-2013 (Units) 18 Exhibit 8: Global TRx Market Share by OEM, 2013 (Units) 19 Exhibit 9: Global TRx Market Share, Chinese vs.
Table 12: Global TRx Forecast by Air Interface, 2008-2013 (% Market Share) 29
Table 9: Global BTS Forecast by Air Interface, 2007-2012 (Units) .
A Comprehensive Analysis of the Global BTS Contract Awards by OEM, Air Interface and Geography
This report covers air interface standards including: GSM850, GSM900, GSM1800, GSM1900, WCDMA850, WCDMA900, WCDMA1800, WCDMA1900, WCDMA2100, CDMA450, CDMA800, CDMA1900, CDMA2100, LTE700, LTE800, LTE850, LTE900, LTE1500, LTE1700, LTE1800, LTE1900, LTE2100, LTE2300 TDD, and LTE2600 TDD and FDD.
Latin America Handset Vendor and Technology Forecast provides historical and forecasted (2003 - 2011) information on handset shipments by unit shipments, air interface, generation, and form factor in the Latin America market.