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

DecadeGenerationEfficiency: 
bps/Hz/sector

1980s1G Analog cellular 0.016
1990s2G Digital (TDMA CDMA)0.05 0.2
2000s3G Enhanced CDMA0.4 0.6
2010s4G OFDM/M1MO 1.0