System and method for power control and antenna grouping in a distributed-input-distributed-output (DIDO) network
First Claim
1. A machine-implemented method for adjusting communication in a wireless transmission system comprised of a multiple antenna system (MAS) with multi-user (MU) transmission (“
- MU-MAS”
) network comprising a plurality of distributed antennas or wireless transceiver stations distributed throughout a cell or coverage area, and a plurality of client devices or users, the method comprising;
applying MU-MAS precoding weights to one or more data streams to generate one or more precoded data streams;
receiving input channel quality information (CQI) and/or channel state information (CSI) related to communication channels over which the precoded data streams are to be transmitted from the plurality of distributed antennas;
determining a plurality of power scaling factors for the distributed antennas based on the CQI and/or CSI; and
applying the power scaling factors to the precoded data streams following precoding in a way that every power scaling factor is applied to one of the plurality of distributed antennas;
wherein the power scaling factor is applied to each of the data streams sent to every MU-MAS antenna and is dynamically adjusted such that an instantaneous per-antenna transmit power may rise above predefined maximum permissible exposure (MPE) limits but the average per-antenna power is maintained below the MPE limits.
6 Assignments
0 Petitions
Accused Products
Abstract
A system and machine-implemented method are described for adjusting communication with a first distributed-input-distributed-output (DIDO) client. For example, a method according to one embodiment of the invention comprises: applying DIDO weights to one or more data streams to generate one or more DIDO precoded data streams; receiving input channel quality information (CQI) and/or channel state information (CSI) related to DIDO communication channels over which the DIDO precoded data streams are to be transmitted; determining a power scaling factor based on the CQI and/or CSI; and applying the power scaling factor to each of the DIDO precoded data streams.
-
Citations
12 Claims
-
1. A machine-implemented method for adjusting communication in a wireless transmission system comprised of a multiple antenna system (MAS) with multi-user (MU) transmission (“
- MU-MAS”
) network comprising a plurality of distributed antennas or wireless transceiver stations distributed throughout a cell or coverage area, and a plurality of client devices or users, the method comprising;applying MU-MAS precoding weights to one or more data streams to generate one or more precoded data streams; receiving input channel quality information (CQI) and/or channel state information (CSI) related to communication channels over which the precoded data streams are to be transmitted from the plurality of distributed antennas; determining a plurality of power scaling factors for the distributed antennas based on the CQI and/or CSI; and applying the power scaling factors to the precoded data streams following precoding in a way that every power scaling factor is applied to one of the plurality of distributed antennas; wherein the power scaling factor is applied to each of the data streams sent to every MU-MAS antenna and is dynamically adjusted such that an instantaneous per-antenna transmit power may rise above predefined maximum permissible exposure (MPE) limits but the average per-antenna power is maintained below the MPE limits. - View Dependent Claims (2, 3, 4, 5, 6)
- MU-MAS”
-
7. A machine-implemented method for adjusting communication in a wireless transmission system comprised of a multiple antenna system (MAS) with multi-user (MU) transmission (“
- MU-MAS”
) network comprising a plurality of distributed antennas or wireless transceiver stations distributed throughout a cell or coverage area, and a plurality of client devices or users, the method comprising;receiving channel state information (CSI) and/or channel quality information (CQI); selecting a plurality of groups of antennas from the plurality of distributed antennas, thereby forming a cluster based on the CSI or CQI; applying MU-MAS precoding weights to generate one or more precoded data streams within every group of antennas based on the CSI and/or CQI; and determining a plurality of power scaling factors for the distributed antennas based on the CQI and/or CSI; wherein the power scaling factor is applied to each of the data streams sent to every MU-MAS antenna and is dynamically adjusted such that an instantaneous per-antenna transmit power may rise above predefined maximum permissible exposure (MPE) limits but the average per-antenna power is maintained below the MPE limits. - View Dependent Claims (8, 9, 10, 11, 12)
- MU-MAS”
Specification