Table 1: Cellular system: 1G to 4G.

Decade Generation Efficiency:  bps/Hz/sector 1980s 1G Analog cellular 0.016 1990s 2G Digital (TDMACDMA) 0.050.2 2000s 3G Enhanced CDMA 0.40.6 2010s 4G OFDM/M1MO 1.0