The term wireless communication encompasses various types of devices including handheld radios, cellular phones, PDAs, and wireless networking. Other examples of wireless technology are found in garage door openers, Maritime VHF, satellite television, computer mice, keyboards, GPS and cordless telephones. Wireless communication can be restricted to short distances, as with blue-tooth communications or several thousand miles as with short wave radio communications.
Wireless communications are often found in the telecommunications industry to transfer information without the use of wires. This transmission of information over significant distances to communicate with electrical devices such as telegraphs, telephones, and teletypes, the use of radio and microwave communications, as well as fiber optics and their associated electronics, plus the use of the orbiting satellites and the Internet. Traditionally, in earlier times, telecommunications involved the use of visual beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages, audio horns, or whistles. In the modern age of electricity and electronics, telecommunications now evolved in to more advanced, secure and complex devices, operations and applications.
As the area of opportunity in telecommunications continues to shift from wired to wireless systems the need to access more and more electromagnetic spectrum becomes more important. There are several competing views of how to free up spectrum under the current control of the world’s government bureaucracy.