4G TECHNOLOGIES

Technological Feasibility

There are several technologies suggested to deploy in 4G and these may include

• Software Defined Radio (SDR): is a radio communication system where components that have typically been implemented in hardware (i.e. mixers, filters, amplifiers, modulators/demodulators, detectors etc.) are instead implemented in that allows changing the radio characteristics flexibly to meet specific requirements.
• Orthogonal frequency - division multiplexing (OFDM): is a frequency-division multiplexing (FDM) scheme utilized as a digital multi-carrier modulation method.
• Multiple-input and multiple-output, or MIMO), is the use of multiple antennas at both the transmitter and receiver to improve communication performance.
• Universal Mobile Telecommunications System (UMTS), standardized by 3GPP.
• Time Division-Synchronous Code Division Multiple Access, or TD-SCDMA, is a 3G mobile telecommunications standard, being pursued in the People's Republic of China by the Chinese Academy of Telecommunications Technology.

All these technologies are typified by high rates of data transmission and packet-switched transmission protocols. 3G technologies, by contrast, are a mix of packet and circuit-switched networks.