Space division multiple access or spatial division multiple access is a technique which is MIMO (multiple-input multiple-output) architecture and used mostly in wireless and satellite communication. It has the following features.

• All users can communicate at the same time using the same channel.
• SDMA is completely free from interference.
• A single satellite can communicate with more satellites receivers of the same frequency.
• The directional spot-beam antennas are used and hence the base station in SDMA, can track a moving user.
• Controls the radiated energy for each user in space.