A Comparative Study on Optimization Techniques for Classifying Remote Sensing Images

Abstract: Mobile communications systems revolutionized the way of people communication, joining together and mobility during conversation. The word telecommunication is formed from the words TELE (bridging large distance) and COMMUNICATION (Conversation).Telecom has attracted many users and undergoing numerous changes, from half duplex to point-to-point , short message services , conferencing , video calling , point-to-multi- point Internet connectivity to high speed data transfer from (9.6 Kbps to 100 Mbps). In this Paper we abstracting the evolution and development of various generations of mobile wireless technology along with their significance performance of one over the other and some of the important issues pertaining to the evolution of mobile communication networks from 0th generation (which was the initiation of wireless communication).The first generation has fulfilled the basic mobile voice, while the second generation has introduced capacity and coverage. 2G followed by the third generation, which has quest for data at higher speeds to open the gates for truly “mobile broadband” experience. It was further realized by the fourth generation (4G).The Fourth generation is providing access to wide range of telecommunication services, including advanced multimedia application supported by mobile and fixed networks, which are increasingly packet based, along with a support for low to high mobility applications and wide range of data rates. 5G technologies will change the way most high - bandwidth, users can access the services in Product Engineering, Documentation, supporting electronic transactions.

Keywords: Frequency bands, distortion, Handover, communication channels, channel access methods, Antenna, Tilt, network component and optimization