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AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsShaohua Li, Jianguo Long
Estimating the term…
Embodiments of the present disclosure provide methods, apparatuses, and computer products for a base station. A method includes retrieving a plurality of phase rotations associated with a codebook for precoding matrix indicator, PMI, feedback; transmitting, to a User Equipment, UE, a plurality of Channel State Information Reference Signals, CSI-RSs, on a plurality of beams that correspond to the plurality of phase rotations; receiving, from the UE, a plurality of PMIs associated with the plurality of CSI-RSs, respectively, wherein the plurality of PMIs are indicative of a plurality of quantized precoding matrices from the codebook; using the plurality of quantized precoding matrices and the plurality of phase rotations to estimate phase and/or delay errors for a plurality of transmit antenna branches of the base station.
A method implemented in a base station for a cellular communications system, the method comprising:
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A base station for a cellular communications system, the base station comprising processing circuitry configured to cause the base station to:
A method of determining codebook rotations performed by a computer system, comprising:
A computer program product stored in non-transitory computer readable media, the computer program product comprising program instructions for:
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Dependencies are inferred from the claim text.