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CDMA frequency bands or frequency ranges are the cellular frequencies designated by the ITU for the operation of cdmaOne and CDMA2000 mobile phones and other mobile ...
In Russia and some other countries, local carriers received licenses for 450 MHz frequency to provide CDMA mobile coverage area. Many GSM phones support three bands (900/1,800/1,900 MHz or 850/1,800/1,900 MHz) or four bands (850/900/1,800/1,900 MHz), and are usually referred to as tri-band and quad-band phones, or world phones ; with such a ...
CDMA optimizes the use of available bandwidth as it transmits over the entire frequency range and does not limit the user's frequency range. It is used as the access method in many mobile phone standards .
Situation is however worse in CDMA-based systems like IS-95, where Qualcomm is the major IP holder. [citation needed] GSM has a fixed maximum cell site range of 120 km, [5] which is imposed by technical limitations. [6] This is expanded from the old limit of 35 km.
CDMA2000 1X (IS-2000), also known as 1x and 1xRTT, is the core CDMA2000 wireless air interface standard.The designation "1x", meaning 1 times radio transmission technology, indicates the same radio frequency (RF) bandwidth as IS-95: a duplex pair of 1.25 MHz radio channels. 1xRTT almost doubles the capacity of IS-95 by adding 64 more traffic channels to the forward link, orthogonal to (in ...
A license owner can also partition the license (split geographically) or disaggregate it (split the whole licensed frequency range into two sub-ranges). [2] Whole, partitioned, and disaggregated licenses can be sold to virtually any other entity. The Cellular band occupies 824–849 MHz and 869–894 MHz ranges.
cdmaOne network structure. The IS-95 standards describe an air interface, [1] a set of protocols used between mobile units and the network. IS-95 is widely described as a three-layer stack, where L1 corresponds to the physical layer, L2 refers to the Media Access Control (MAC) and Link-Access Control (LAC) sublayers, and L3 to the call-processing state machine.
Frequency (MHz) Launch date Notes ArgoNET ... CDMA service suspended starting from 31 October 2017. BSNL