Terminology of Communication
This entry is missing Overview , add relevant content to make the entry more complete, and it can also be upgraded quickly. Hurry up edit Come on! Satellite communication means that a certain power transponder is installed on the satellite to properly process the voice or television broadcast signal sent from the ground and broadcast it to another place to realize communication between two or more places. This kind of communication can transmit telephone, radio and television programs. Satellite communication emerged in the mid-1960s. At first, this technology was mainly used to transmit information between continents and oceans. With the improvement of technology and the decrease of cost, since the 1970s, some countries have used satellite communication to develop the transmission of domestic telephone, radio and television signals. [1]
- Chinese name
- Satellite communication
- Definition
- A certain power transponder shall be installed on the satellite to properly process the sound or television broadcast signal sent from the ground and broadcast it to another place, so as to realize the communication between two or more places
Contemporary satellite communication is also widely used in posts and telecommunications, geology, hydrology, marine transportation, military, disaster relief, emergency rescue and other aspects. On satellite transmission Radio and TV programs As far as it is concerned, it includes collective reception and individual reception. Collective reception is to receive, amplify and convert the signals transmitted from satellites to a certain channel through satellite ground stations before broadcasting, so that users in this area can listen or watch with ordinary receivers. Individual reception is a receiver that directly listens to or watches satellite radio programs. Such receivers need additional antennas, low-noise frequency converters, frequency modulation amplitude modulation converters, etc., and are finally connected to ordinary receivers. As long as there are three synchronous communication satellites, they can communicate with each other at any time anywhere in the world through ground stations. Satellite communication is not restricted by climate and physical geography. In terms of economy, satellite communication is much cheaper than long-distance cable communication. If a communication line from Beijing to Urumqi is also built, the cost of cable is dozens of times higher than that of satellite communication (with multiple ground receiving stations). [1] 
