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SDMA is a type of multiplexing technology used in mobile network.
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Stands for space division multiple access.
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Different from FDMA , TDMA , CDMA.
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SDMA aims to use the same frequency channel on the same time and code by different users.
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Sims to achieve high spectral efficiency.
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To share the same channel among different users using SDMA we have to ensure the enough separation between uses.
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SDMA can be implemented by using sector antenna 120 degree coverage.
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Users can communicate using the same channel.
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Beam forming technology used to let the antenna provide narrow beam focusing only on the destination user to avoid interference.
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The main disadvantage of SDMA is the design complexity and hardware requirements for handset and site.
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