The difference between TDMA and TDM, CDMA and CDM, FDMA and FDM?
The main difference between tdm and tdma (also fdm/fdma, etc) is that with tdm (also fdm, etc.) the signals multiplexed (i.e. sharing a resource) come from the same node, whereas for tdma (also fdm, etc.) the signals multiplexed come from different sources/transmitters. – Time Division Multiplexing (TDM) imply partitioning the bandwidth of the channel connecting two nodes into finite set of time slots. – Time Division multiple Access (TDMA) imply partitioning the bandwidth of a channel shared by many nodes, typically an infrastructure node and several mobile nodes, where each node gets to access its dedicated time slot.
The main difference between tdm and tdma (also fdm/fdma, etc) is that with tdm (also fdm, etc.) the signals multiplexed (i.e. sharing a resource) come from the same node, whereas for tdma (also fdm, etc.) the signals multiplexed come from different sources/transmitters. – Time Division Multiplexing (TDM) imply partitioning the bandwidth of the channel connecting two nodes into finite set of time slots. – Time Division multiple Access (TDMA) imply partitioning the bandwidth of a channel shared by many nodes, typically an infrastructure node and several mobile nodes, where each node gets to access its dedicated time slot.