| CPC H04B 7/0658 (2013.01) [H04B 7/0626 (2013.01); H04B 7/0632 (2013.01); H04B 7/0634 (2013.01)] | 20 Claims |

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8. A method of operating a base station (BS), comprising:
identifying a transmission associated with a rank indicator (RI) value received from a user equipment (UE);
determining channel state information (CSI) from the transmission;
verifying validity of the CSI based on a characteristic of the transmission; and
storing the CSI.
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