Cellular Wireless networks

• 1G
– Analog speech communications.
– Analog FDMA.
– Technology: AMPS
• 2G
– Digital modulation of speech communications.
– Advanced security and roaming.
– TDMA and narrowband CDMA.
– Technology: GSM, PDC and IS-95 (cdmaOne)
• 3G
– Global harmonization and roaming.
– Wideband CDMA
– Technology: UMTS, cdma2000 and TD-SCDMA