Method of determining channel state information
AssigneeBlackBerry Limited
InventorsChandra-Prakash Gupta, Martin Kosakowski, Ernst Slawomir Zielinski
Life of this patent
Estimating the term…
Abstract
A method for estimating channel state information (CSI) for a communication channel is disclosed. Theoretical channel capacities are calculated using combinations of rank indicator (RI) and precoding matrix index (PMI) values. A number of these theoretical channel capacities are selected and used for determining an optimum combination of channel quality indicator (CQI) values, RI values and PMI values. This combination of values is subsequently transmitted as CSI.
Claims27
A method of estimating channel state information (CSI) for a communication channel comprising:
- calculating a number of theoretical channel capacities using a plurality of combinations of values of an indicator of rank and an indicator of precoding;
- selecting a plurality M of said theoretical channel capacities and their associated values of the indicator of rank and indicator of precoding;
- and,
- determining the optimum combination of values of an indicator of channel quality, the indicator of rank and indicator of precoding, from the selected M values of the indicator of rank and indicator of precoding.
A user equipment comprising:
- one or more processors configured to:
- calculate a number of theoretical channel capacities using a plurality of combinations of values of an indicator of rank and an indicator of precoding;
- select a plurality M of said theoretical channel capacities and their associated values of the indicator of rank and indicator of precoding;
- and,
- determine the optimum combination of values of an indicator of channel quality, the indicator of rank and indicator of precoding, from the selected M values of the indicator of rank and indicator of precoding.
Dependencies are inferred from the claim text.