12.4 Precoding weight restriction

25.2143GPPPhysical layer procedures (FDD)Release 17TS

A UE is restricted to report PCI, and NTBP within a precoder codebook subset specified by a bitmap parameter PrecodingWeightRestriction configured by higher layer signalling. The bitmap can specify all possible precoder codebook subsets from which the UE can assume the Node B may be using when the UE is configured in MIMO mode with four transmit antennas. The bitmap forms the bit sequence where is the LSB and is the MSB and where a bit value of zero indicates that the precoding indices reporting is not allowed in the NTBP/PCI/CQI report.