| Digital Cellular Telephone | |||||
|---|---|---|---|---|---|
| Standard | IS-54/-136 North American Digital Cellular | IS-95 North American Digital Cellular | GSM Global System for Mobile Communications |
DCS 1800 | PDC Personal Digital Cellular |
| Mobile Frequency Range (MHz) | Rx: 869-894 Tx: 824-849 | Rx: 869-894 Tx: 824-849 | Rx:925-960 Tx:880-915 | Rx: 1805-1880 Tx: 1710-1785 | Rx: 810-826 Tx: 940-956 Rx: 1429-1453 Tx: 1477-1501 |
| Multiple Access Method | TDMA/ FDM | CDMA/ FDM | TDMA/ FDM | TDMA/ FDM | TDMA/ FDM |
| Duplex Method | FDD | FDD | FDD | FDD | FDD |
| Number of Channels | 832 (3 users /channel) | 20(798 users /channel) | 124 (8 users /channel) | 374 (8 users /channel) | 1600 (3 users /channel) |
| Channel Spacing | 30kHz | 1250kHz | 200kHz | 200kHz | 25kHz |
| Modulation | ( /4 DQPSK) |
QPSK /OQPSK | GMSK (0.3 Gaussian Filter) | GMSK (0.3 Gaussian Filter) | (/4 DQPSK) |
| Channel Bit Rate | 48.6 kb/s | 1.2288 Mb/s | 270.833 kb/s | 270.833 kb/s | 42 kb/s |
