Spatial Division Multiple Access SGSN
Spatial Division Multiple Access. A complement (not an alternative) to CDMA and TDMA, this technology increases the number of users that can access an existing wireless phone or data system by exploiting the spatial characteristics of the channel itself through highly developed implementation of an intelligent antenna system’s capabilities for receiving and transmitting.
SDMA is a multiple access technique based upon sharing the access to the network on a geographical basis whereby the service area is divided into non-overlapping cells containing low-power transmitters.
subcarrier division multiple access
Spatial (or Space) Division Multiple Access. A technique that allows multiple users that are separated in space to transmit and receive on the same sub-channel at the same time. SDMA is implemented in Adaptive Antenna Systems (AAS).
Space division multiple access A variation of TDMA and CDMA that potentially will be used in high-bandwidth, third-generation wireless products.
Space Division Multiple Access , A technique makes it possible to increase the capacity of a cellular mobile radio system by taking advantage of spatial separation between users. The base station does not transmit the signal to the entire cell area, as in conventional access techniques, but concentrates power in the direction of the mobile unit for which the signal is directed, reducing it in the directions where other units are present.