CertiGuide to A+ (A+ 4 Real)  9  Chapter 13: Basic Networking Terminology       9  Wireless            9  Infrared (IR)

Infrared (IR) 1 Satellite

The inherent congestion and blocking of a radio-frequency spectrum, especially in large cities, cities, it becomes rather problematic to receive frequency, and permissiveness of "open" frequencies which can guarantee a permanent quality of the channels in commercial and official communication systems, due to the use of advanced transfer technologies with frequency jump and complex digital coding.

A high confidentiality of communication is ensured by a narrow beam with complete absence of lateral radiation, which is the carrier of the transfer.

The absence of complexities in IR technology is limiting the transfer speed. In radio frequency systems to achieve reasonable width of a transfer band it is crucial to apply refined coding, which besides reduces other characteristics of system (e.g. the signal-to-noise value). The high-speed characteristics of the transfer channel in IR-systems are defined by the characteristics and efficiency of modulating amplifiers and frequency properties of photo diodes. Already now, speeds have reached a mark of 2.5 Gbps, and with multiplexing on a wavelength - up to 10 Gbps. This seems not to be a limit.

IR wireless systems develop further in the market of telecommunications. Moreover, the opportunities of tomorrow's day already occur today.

Infrared (IR) 1 Satellite