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

RF Wireless Tutorials