Editing Multiplexing (section)

===Space-division multiplexing===
{{Main|Space-division multiple access}}
In wired communication, [[space-division multiplexing]], also known as space-division multiple access (SDMA) is the use of separate point-to-point electrical conductors for each transmitted channel. Examples include an analog stereo audio cable, with one pair of wires for the left channel and another for the right channel, and a multi-pair [[telephone cable]], a switched [[star network]] such as a telephone access network, a switched Ethernet network, and a [[mesh network]].

In wireless communication, space-division multiplexing is achieved with multiple antenna elements forming a [[phased array antenna]]. Examples are [[multiple-input and multiple-output]] (MIMO), single-input and multiple-output (SIMO) and multiple-input and single-output (MISO) multiplexing. An IEEE 802.11g wireless router with ''k'' antennas makes it in principle possible to communicate with ''k'' multiplexed channels, each with a peak bit rate of 54&nbsp;Mbit/s, thus increasing the total peak bit rate by the factor ''k''. Different antennas would give different [[multi-path propagation]] (echo) signatures, making it possible for [[digital signal processing]] techniques to separate different signals from each other. These techniques may also be utilized for [[space diversity]] (improved robustness to fading) or [[beamforming]] (improved selectivity) rather than multiplexing.