The most important purpose of Statechart diagram is to model States are defined as a condition in which an object exists and it changes when some event is triggered. Statechart diagram describes the flow of control from one State diagram: Used to describe the dynamic behaviour of objects and could also be used to describe the entire system behaviour. This kind of technology allows for better deployment of transmitter signals. It is an improvement over the first-generation CDMA, which uses narrowband transmission. → Broadband CDMA : Broadband code division multiple access (B-CDMA) is a CDMA-based cell phone technology that uses broadband transmission. Uses a code to distinguish there data from others. In this technique the sender and receiver → CDMA(Code Division Multiple Access) : In CDMA all stations are allowed to use the channel simultaneously and can use the the whole bandwidth. In this kind of medium access all stations uses the whole available bandwidth for a fixed time slots. → D-AMPS(Digital- Advanced Mobile Phone Service) : It uses time division multiple access(TDMA). In FDMA whole availableīandwidth is divided into small frequency bands and each station is allocated to one frequency band which it will use to send and receive data.
→ AMPS(Advanced Mobile Phone Service): It uses frequency division multiple access(FDMA) to provide access to the channel by multiple stations at the same time. → AMPS, D-AMPS, CDMA, Broadband CDMA are the standard methods used for cellular communication.
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