UNIDIRECTIONAL TRANSMISSION

• Radio: audio signal from an emitting station to an indefinite number of receivers
• TV: audio and video signal from an emitting station to an indefinite number of receivers
• GPS: localization through the reception of signals coming from satellites orbiting around the Earth
• Radio command: signal that activates a remote controlled device
• Telemetry: control of a system functioning through remote measurement of some parameters

BIDIRECTIONAL TRANSMISSION

• Cellular: telecommunication network that allows the exchange of information among mobile terminals within a specific area
• Radio link: radio communication among fixed and usually visible points
• Wi-Fi: interconnection of several devices within an area not wider than some hundreds of metres
• Telepass: Italian brand name for an access control system based on interrogation and identification through radio frequency
• Radio amateurs: from a transmitter to a receiver and vice versa
• Wii: pointing system where signals are exchanged between a remote control handled by a user and a nearby console
• Professional mobile radios: protected and confidential interconnection through coding

ACQUISITION

• Radio telescope: detection of electromagnetic emissions coming from the Space
• Radar: detection of the response given by an object to an emitted signal

 

(by Franco Fuschini)