Mobile Radio Systems in North America
This page on Mobile Radio Systems in North America covers AMPS, NAMPS, USDC, CDPD, IS-95, GSC, POCSAG, FLEX, DCS-1900(GSM), PACS, MIRS and iDen.
| Mobile Radio Systems |
TYPE | YEAR | MULTIPLE ACCESS |
FREQUENCY BAND |
MODU- LATION |
BW |
|---|---|---|---|---|---|---|
| AMPS | Cellular | 1983 | FDMA | 824-894 MHz |
FM | 30 kHz |
| NAMPS | Cellular | 1992 | FDMA | 824-894 MHz |
FM | 10 kHz |
| USDC | Cellular | 1991 | TDMA | 824-894 MHz |
Pi/4 DQPSK |
30 kHz |
| CDPD | Cellular | 1993 | FH/ Packet |
824-894 MHz |
GMSK | 30 KHz |
| IS-95 | Cellular /PCS |
1993 | CDMA | 824-894 MHz/ 1.8-2.0 GHz |
QPSK /BPSK |
1.25 MHz |
| GSC | Paging | 1970s | Simplex | Many | FSK | 12.5 KHz |
| POCSAG | Paging | 1970s | Simplex | Many | FSK | 12.5 KHz |
| FLEX | Paging | 1993 | Simplex | Many | 4-FSK | 15 KHz |
| DCS-1900 (GSM) |
PCS | 1994 | TDMA | 1.85-1.99 GHz |
GMSK | 200 KHz |
| PACS | Cordless /PCS |
1994 | TDMA/ FDMA |
1.85 -1.99 GHz |
Pi/4 DQPSK |
300 KHz |
| MIRS | SMR /PCS |
1994 | TDMA | Many | 16QAM | 25 KHz |
| iDen | SMR /PCS |
1995 | TDMA | Many | 16QAM | 25 KHz |
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