Provide detailed explanation to the following question 1 Des

Provide detailed explanation to the following question;

1. Describe the key technologies and capabilities underpinning 4G and 4G-LTE.

Solution

4G technology is the called as the fourth generation mobile communication technology. It is combination of 3G and WLAN and high quality videos, images can be transfered.4G communication speed theoretically achieves transmission of 100Mbps. 4G network has a much higher bandwidth than that of 3G network cellular systems. Each 4G channel will occupy 100MHz spectrum which is equivalent to 20 times the W-CDMA 3G networks.It can meet almost all users’ requirements for wireless services. In the absence of cable modem or DSL coverage where 4G wireless networks can be deployed, further expansion throughout an area.The td- LTE is the abbreviation of TD-SCDMA Long Term Evolution, it is refers to the long-term evolution of tdma. The TD-scdma LTE belongs to the second stage of the future evolution and development of td-scdma technology and standard connecting with TD- SCDMA and TD-SCDMA enhanced technology standard. In the radio access network (RAN) side CDMA technology can be changed to OFDM (Orthogonal Frequency Division Modulation) technology which can against multipath interference in broadband systems more effective. OFDM technology has many advantages such as anti-multipath interference, simple and flexible to support different bandwidth and spectrum efficiency to support efficient adaptive scheduling etc.

4G-LTE is the 4G storage technology recognized. To further improve the spectrum efficiency, MIMO (multiple input / multiple output) technology has become a necessary LTE technology. The TD-LTE introduces OFDM technology instead of CDMA in the basic multiple access technology, and introduces MIMO (Multiple-Input Multiple-Output) technology in the smart antenna (SA), further formed the SA + MIMO antenna technology more advanced.

Thus the various key technologies implemented are: