High performance pilot assignment for massive multiple input multiple output networks
AssigneeNokia Solutions and Networks Oy
InventorsCarles DIAZ VILOR, Alexei ASHIKHMIN, Hong YANG
Life of this patent
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Abstract
High performance pilot assignment for massive multiple input multiple output networks is provided. The method may include calculating a channel correlation between at least one pair of user equipment. The method may also include executing a greedy algorithm based on the calculated channel correlation to determine one or more pilots that maximize a signal to interference noise ratio of at least one user equipment. The determined one or more pilots may be assigned to the at least one pair of user equipment.
Claims21
An apparatus, comprising:
- at least one processor;
- and
- at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to:
- calculate a channel correlation between at least one pair of user equipment;
- execute a greedy algorithm based on the calculated channel correlation to determine one or more pilots that maximize a signal to interference noise ratio of at least one user equipment;
- and
- assign the determined one or more pilots to the at least one pair of user equipment
- wherein the channel correlation for the at least one pair of user equipment is calculated according to the following:
- Σ
- m
- =
- 1
- M
-
- a
- m
- ,
- k
-
- a
- m
- ,
- j
-
- trace
-
- (
- R
- m
- ,
- k
-
- R
- m
- ,
- j
- )
- .
- where a indicates the access point that serves the respective user equipment, and R is a corresponding channel covariance matrix.
(canceled)
A method, comprising:
- calculating a channel correlation between at least one pair of user equipment;
- executing a greedy algorithm based on the calculated channel correlation to determine one or more pilots that maximize a signal to interference noise ratio of at least one user equipment;
- and
- assigning the determined one or more pilots to the at least one pair of user equipment
- wherein the channel correlation for the at least one pair of user equipment is calculated according to the following:
- ∑
- m
- =
- 1
- M
-
- a
- m
- ,
- k
-
- a
- m
- ,
- j
-
- trace
-
- (
- R
- m
- ,
- k
-
- R
- m
- ,
- j
- )
- .
- _
- where a indicates the access point that serves the respective user equipment, and R is a corresponding channel covariance matrix.
-21. (canceled)
A non-transitory computer readable medium comprising program instructions that, when executed by an apparatus, cause the apparatus at least to:
- calculate a channel correlation between at least one pair of user equipment;
- execute a greedy algorithm based on the calculated channel correlation to determine one or more pilots that maximize a signal to interference noise ratio of at least one user equipment;
- and
- assign the determined one or more pilots to the at least one pair of user equipment
- wherein the channel correlation for the at least one pair of user equipment is calculated according to the following:
- ∑
- m
- =
- 1
- M
-
- a
- m
- ,
- k
-
- a
- m
- ,
- j
-
- trace
-
- (
- R
- m
- ,
- k
-
- R
- m
- ,
- j
- )
- .
- _
- where a indicates the access point that serves the respective user equipment, and R is a corresponding channel covariance matrix.
-30. (canceled)
Dependencies are inferred from the claim text.