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Wireless

 

Analog Cellular Telephones

Standard AMPS NAMPS ETACS NTACS NMT-450 NMT-900
Mobile Frequency Range (mHz):Â Rx 869 - 894 869 - 894 916-949 860-870 463 - 468 935-960
Mobile Frequency Range (mHz):Â Tx 824-849 824-849 871-904 915-925 453-458 890-915
Multiple Access Method FDMA FDMA FDMA FDMA FDMA FDMA
Duplex Method FDD FDD FDD FDD FDD FDD
Number of Channels 832 2496 1240 400 200 1999
Channel Spacing (kHz) 30 10 25 12.5 25 12.5
Modulation FM FM FM FM FM FM
 

 

 

Digital Cellular Telephones

Standard TDMA CDMA GSM DCS 1800/1900 PDC
Mobile Frequency Range (mHz):Â Rx 869-894 869 - 894 925-960 1805-1800 810-826
1429-1453
Mobile Frequency Range (mHz):Â Tx 824-849 824-849 880-915 1710-1785 940-956
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 20 124 374 1600
Channel Spacing (kHz) 30 1250 200 200 25
Modulation π/4 DQPSK QPSK/OQPSK GMSK GMSK π/4 DQPSK
Channel Bit Rate 48.6 kb/s 1.2288 Mb/s 270.833 kb/s 270.833 kb/s 42 kb/s
 

 

 

Cordless Telephones

Standard CT0 CT1 CT1+ CT2 CT2+ DECT PHS
Mobile Frequency Range (mHz) 46/49 914/960 885/932 864/868 944/948 1800-1900 1900-1918
Multiple Access Method FDMA FDMA TDMA/FDM TDMA/FDM TDMA/FDM TDMA/FDM TDMA/FDM
Duplex Method FDD FDD TDD TDD TDD TDD TDD
Number of Channels 10, 12, 15, 20, or 25 40 80 40 40 10 300
Channel Spacing (kHz) 1.7, 20, 25, or 40 25 25 100 100 17.28 300
Modulation FM FM FM GFSK GFSK GFSK π/4 DQPSK
Channel Bit Rate n/a n/a n/a 72 kb/s 72 kb/s 1.152 Mb/s 384 kb/s
 

 

 

Wireless Data

Standard CDPD Bluetooth IEEE 802.11 FHSS IEEE 802.11 DSSS
Mobile Frequency Range (mHz): Rx 869-894 2400-2497 2400-2483 (N. America /Europe)
2470-2499 (Japan)
2400-2483 (N. America and Europe)
2470-2499 (Japan)
Mobile Frequency Range (mHz): Tx 824-849 2400-2497 2400-2483 (N. America/Europe)
2470-2499 (Japan)
2400-2483 (N. America and Europe)
2470-2499 (Japan)
Multiple Access Method FDMA Frequency hopping CSMA CSMA
Duplex Method FDD TDD TDD TDD
Number of Channels 832 79
23 (Japan, Spain, France)
79 11
Channel Spacing 30 kHz 1 MHz 1 MHz 11 MHz
Modulation GMSK GFSK GFSK DBPSK (1 MB/s)
DQPSK (2 MB/s
Channel Bit Rate 19.2 kb/s 1 Mb/s symbol rate 1 or 2 MB/s 1 or 2 MB/s

Vendors

Philips

replacetopic

Author : Unknown Editor

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