First Generation

The First Generation cellular systems in general used the FDMA technique and functioned more or less exactly as described above. These systems used analog modulation techniques like FM. The examples of first generation cellular systems are AMPS(Advance Mobile Telephone System), NMT (Nordic Mobile Telephone) system etc. These systems suffered from limitations like low service quality,long call setup time,inefficient use of bandwidth, susceptible to interference, bulky and expensive equipments, support only for speech,insecure transmission etc.