39 results about "Spatial division multiplexing" patented technology

A method for communication over a wireless local area network (WLAN) includes receiving uplink signals from a plurality of stations in the WLAN. Responsively to the uplink signals, a set of the stations is selected for inclusion in a spatial multiplexing group. Downlink signals are transmitted simultaneously to the stations in the set using spatial division multiplexing (SDM).

In a wireless network employing Spatial Division Multiplexing Access (“SDMA”) in at least one of its cells, a method is provided for dynamically allocating transmission resources to different subscriber devices. The method comprises the steps of: providing at least one base station comprising at least one antenna array; providing one or more sectors associated with that wireless communications network; dynamically dividing one or more of the sectors into a plurality of virtual sub-sectors, each allowing communications between the base station and at least one respective subscriber; from among the plurality of the virtual sub-sectors, selecting at least one pair of subscriber devices wherein each of the pair of subscriber devices is not interfered substantially by transmissions directed to the other subscriber of that pair; for each of the divided sectors, generating plurality of time frequency allocation maps; transmitting the generated maps to all virtual sub-sectors associated with the respective sector; and for each of the sectors, beamforming the transmissions to be conveyed to the subscriber devices' pairs, summing them and conveying the summed result towards the array antenna.

A wireless base station device includes a plurality of transmit weight generation sections and a beam selection section. The transmit weight generation sections generate pieces of transmit weight information used for spatial division multiplexing transmission according to different algorithms. The pieces of transmit weight information are generated based on channel information on a plurality of terminals each having one or more antennas with which the wireless base station device performs spatial division multiplexing transmission. The beam selection section selects one of the pieces of transmit weight information generated.

The present invention relates to multiple antenna wireless access points that multiplex signals by spatial division. In particular, it relates to grouping clients of the access point for spatial division multiplexing. Particular aspects of the present invention are described in the claims, specification and drawings.

A configuration for local coordination between the child node and parent node to enable SDM communication between the parent and child node, without input or interaction from the CU. The apparatus receives, from a CU, an indication including an allocation of resources. The apparatus determines a type of communication with a second node based on the allocation of resources. The apparatus communicates with the second node based on the determined type of communication and utilizing the allocated resources. The apparatus coordinates with a parent node to utilize the allocated resources in a SDM operation between the child node and the parent node.

Provided is a transmitting and receiving device that makes correct judgment on directionality-controlled spatial division multiplexing communication to improve transmission efficiency. In this device: the channel estimation unit (205) performs channel estimation using known symbols included in the received signal; the channel change determination unit (206) obtains the channel estimation result estimated in the previous process and the result of this time. The correlation value between the estimated channel estimation results is used to obtain the size of the channel change, so that it can be judged based on the size of the channel change whether to perform spatial division multiplexing communication with directional control or to perform spatial division multiplexing without directional control. communication. When the wireless receiving unit (107) receives the transmission weight, the switching unit (108) outputs the received transmission weight to the multiplication units (103-1 to 103-n). When the wireless receiving unit (107) receives a signal including an instruction to perform spatial division multiplexing communication without directivity control, the switching unit (108) outputs "1" indicating no directivity control as a transmission weight to the multiplier Unit (103-1 to 103-n).

Embodiments of the present invention provide a method and device for sending and receiving data, including: a transmitting device precodes multiple spatial streams to obtain multiple precoded data streams, and transmits the multiple precoded data streams, wherein the At least two of the multiple spatial streams are obtained by performing transmit diversity processing on an original spatial stream. Since some of the multiple spatial streams on the same time-frequency resource can be transmitted using beamforming transmission based on transmit diversity, other spatial streams can be transmitted using space-division multiplexing, thereby improving the utilization of time-frequency resources .