1. Mobile communication: refers to the use of wireless channels for mutual communication between moving objects or between moving objects and fixed objects.

2. The three basic elements of the communication network are: RF antenna terminal , transmission system and switching system.

3. Analog communication network (frequency division system): Terminals, transmission and switching systems are all communication networks implemented in an analog way.

4. Digital communication network (time division system): Terminals, transmission and switching systems are all digital communication networks.

5. CDMA: Code Division Multiple Access digital mobile communication. Use different coding methods to achieve multiple access communications.

6. TDMA: time division multiple access digital mobile communication. The use of time division method to achieve multiple access communication. At present, the GSM900/1800MHz repeater developed and produced by our company belongs to the TDMA system of GPS Antennas.

7. Channel: The channel through which the signal is transmitted.

8. Base station (BS): also known as wireless base station/base station of WIFI Antennas. It is a set of equipment that serves a wireless cell (usually an omni-directional or three-sector cell). The base station is in a dominant position in the call processing process. The call processing process includes three main contents: 1. Controlling the mobile station in the control channel and providing common information about system parameters; 2. Providing support for the mobile station to access the network; 3. In the voice The mobile station is controlled in the channel.

9. Repeater station: Repeater station with the same frequency and two-way amplification, also known as the same frequency repeater, the transmission method is transparent transmission. The function is to receive and forward the signal between the base station and the mobile station.

10. Cellular: The shape of the entire communication area service area formed by the adjacent hexagonal wireless cells (also called cellular cells) is very similar to that of a honeycomb, so it is vividly called a cellular network (Cellular System), also called cellular mobile communication.