Beamformer accounting for non-homogeneity of offered traffic distribution among cells
AssigneeHughes Network Systems, LLC
InventorsUdaya Bhaskar, Stanley Kay, Neal David Becker
Life of this patent
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Abstract
A system and method for beamforming beams including: matching weights T to a distribution of resources for each of the beams based on a traffic variation for each of the beams; calculating, with a signal processor for each of the beams based on the weights T, a power scalar β and a weighted minimum mean squared error (WMMSE) matrix WWMSE; and transmitting/receiving the beams based on the power scalar β and the WMMSE matrix WWMSE, where the power scalar β satisfies a total power constraint of an antenna subsystem.
Claims18
A non-transient computer-readable storage medium having instructions embodied thereon, the instructions being executable by one or more processors to perform a method for beamforming beams, the method comprising:
- matching weights T to a distribution of resources for each of the beams based on a traffic variation for each of the beams;
- calculating, with a signal processor for each of the beams based on the weights T, a power scalar β and a Weighted Minimum Mean Squared Error (WMMSE) matrix WWMSE;
- and
- transmitting/receiving the beams based on the power scalar β and the WMMSE matrix WWMSE,
- wherein the power scalar β satisfies a total power constraint of an antenna subsystem, and wherein the WMMSE matrix WWMSE is calculated as:
- W
- WMSE
- =
- β
- *
- HT
- †
- (
- TH
- †
-
- HT
- †
- +
- K
-
- σ
- 2
-
- t
-
- r
-
- (
- TT
- †
- )
- P
- t
-
- o
-
- t
-
- I
- K
- )
- -
- 1
-
- T
- ,
- Ptot is the total power constraint, H is a N×K channel matrix, K is a count of beams, and σ2 is the noise variance at the receiver.
A beamformer system for beams comprising:
- a traffic module to match weights T to a distribution of resources for each of the beams based on a traffic variation for each of the beams;
- a WMMSE module to calculate, for each of the beams based on the weights T, a power scalar β and a Weighted Minimum Mean Squared Error (WMMSE) matrix WWMSE;
- and
- an antenna subsystem to receive/transmit the beams based on the power scalar β and the WMMSE matrix WWMSE,
- wherein the power scalar β satisfies a total power constraint of the antenna subsystem, and wherein the WMMSE matrix WWMSE is calculated as:
- W
- WMSE
- =
- β
- *
- HT
- †
-
- (
- TH
- †
-
- HT
- †
- +
- K
-
- σ
- 2
-
- t
-
- r
-
- (
- TT
- †
- )
- P
- t
-
- o
-
- t
-
- I
- K
- )
- -
- 1
-
- T
- ,
- Ptot is the total power constraint, H is a N×K channel matrix, K is a count of beams, and σ2 is the noise variance at the receiver.
Dependencies are inferred from the claim text.