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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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