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Three major multiple access schemes Time Division Multiple Access (TDMA) Could be used in narrowband or wideband systems Frequency Division Multiple Access (FDMA ...

... over time Bandwidth limited Cellular Concept Digital Communications Early 1990’s digital systems begin with the goal of increasing the number of users, D-AMPS TDMA FDMA ...

... kHz Time Carrier 1 Carrier 2 Carrier 1 iDEN Trunked/Conventional Trunked TETRA Trunked TETRAPOL Trunked ASTRO Trunked/ Conventional EDACS Trunked/ Conventional TDMA/FDMA ...

... Division Multiple Access Time Division Multiple Access Spread Spectrum Multiple Access Space Division Multiple Access Packet Radio Frequency Division Multiple Access ...

Three major multiple access schemes Time Division Multiple Access (TDMA) Could be used in narrowband or wideband systems Frequency Division Multiple Access (FDMA ...

... for fixed wireless access Allows for huge data rates Has greater line of sight (LOS) requirements than MMDS Modulation Many modulation schemes can be used TDMA/FDD FDMA ...

... PCS 1993 CDMA 824-894 1800-2000 QPSK/BPSK 1250 FLEX Paging 1993 Simplex Several 4-FSK 15 DCS-1900 (GSM) PCS 1994 TDMA 1850-1990 GMSK 200 PACS Cordless/PCS 1994 TDMA/FDMA ...

GSM standard (continued) Multiple Access Methods MAC Alternatives - FDMA MAC Alternatives - TDMA MAC Alternatives - CDMA Physical Channel Structure Used in P-GSM900 ...

Bandes de fréquences Panorama Ondes radios Spectre alloué à la téléphonie 3G Spectre 3G (2) ISM GSM Trames GSM FDMA + TDMA GSM uses 124 frequency channels, each of ...

... of the SIR at point A Using the co-channel ratio Numerical example: If N=7, alpha = 4, then Q~4.6 and * Capacity of Cellular Networks (1/2) FDMA/TDMA FDMA ...

... data from different sources Three basic choices Frequency division multiple access (FDMA) Time division multiple access (TDMA) Code division multiple access (CDMA) FDMA ...

These include FDMA, TDMA, CDMA, SSMA, SDMA, and Packet Radio. Applications that use multiple access techniques such as GSM and others were also discussed.

Chapter 7 Multiple Division Techniques Outline Frequency Division Multiple Access (FDMA) Time Division Multiple Access (TDMA) Code Division Multiple Access (CDMA ...

... Users Transmit in a Large Part of the Spectrum Many Transmitters use the Same Channel using TDMA TDMA Allocates Time Slots * Frequency Division Multiple Access Users ...

TDMA TDMA (Time Division Multiple Access): TDMA builds on FDMA by dividing conversations by frequency and time. Digital compression allows voice to be sent at well ...

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