In computing, the term wireless indicates a communication between electronic devices that does not use cables. Generally the wireless uses radio waves at low power, but the definition also extends to the devices, that exploit the infrared radiation or laser. Communication and wireless systems find direct application in wireless networks of telecommunications, fixed and mobile. This necessitates technology leveraging NZ by companies.
Each wireless communication system is composed of a transmitter, a receiver, antennas, lasers or photodetectors. The communication can be unidirectional, bidirectional half-duplex, bidirectional full-duplex. The electromagnetic frequencies used vary depending on the standard implemented.
Wireless networks are an important form of connection for many activities, and with the continuous improvement of its systems, it is expected they will be more and more, especially for businesses. The market of wireless devices continues to grow and it had an estimated turnover of 300 million dollars in 1998, ballooned to 1.6 billion in 2005. Wireless networks are currently mainly installed in airports, universities and public parks of major cities.
Due to the cost of the wireless equipment, this technology was used only in conditions where the use of cables was problematic or impossible. As prices decrease, WLANs are entering into homes, allowing the sharing of data and Internet connection (through access point and router) between the computers of a family.
