1G (First Generation)

First Generation Wireless Communication (1G)

First Generation wireless technology (1G) is the original analog (An analog or analogue signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of some other time varying quantity), voice-only cellular telephone standard, developed in the 1980s. The main difference between two succeeding mobile telephone systems, 1G and 2G, is that the radio signals that 1G networks use are analog, while 2G networks are digital.

Figure: 1G mobile phone

Keys:

• Developed in 1980s and completed in early 1990’s.
• 1G was old analog system and supported the 1st generation of analog cell phones speed up to 2.4kbps.
• Advance mobile phone system (AMPS) was first launched by the US and is a 1G mobile system.
• Allows users to make voice calls in 1 country.