2G and 3G systems used TDMA, FDMA and CDMA as channel access schemes. However, 4G uses OFDMA and other new technologies (Single Carrier FDMA, Interleaved FDMA, and Multi-carrier CDMA ) instead of CDMA, which is used by all 3-G systems.
2G and 3G systems used TDMA, FDMA and CDMA as channel access schemes. However, 4G uses OFDMA and other new technologies (Single Carrier FDMA, Interleaved FDMA, and Multi-carrier CDMA ) instead of CDMA, which is used by all 3-G systems.