FDMA-TDMA-CDMA: An Introduction By Dr. Ernest Simo 3.0 TIME DIVISION MULTIPLE ACCESS In TDMA systems, given a Frequency, a channel is a Time Gate. Here, a channel is defined as a Time-Slot coupled to a Frequency slice. It is a two-dimensional entity expressed as (Fi,TSj): Having a Frequency (Fi) is a necessary, but not sufficient, condition to defining a TDMA channel. Having a Time-Slot (TSj) is a necessary, but not sufficient, condition to defining a TDMA channel. We require both the Frequency and Time dimensions. Consider a total bandwidth B subdivided info N frequency slices. If each frequency slice is organized into M Time-Slots, N x M users may be supported simultaneously. FDMA-TDMA-CDMA: AN INTRODUCTION By Dr. Ernest Simo © 1999 DR. ERNEST SIMO - SPACE2000