CSI Omission for Linear Combination Port-Selection Codebook

The patent segments the precoder coefficients into multiple coefficient subsets based on different priority levels. High-priority coefficients (e.g., those corresponding to dominant eigenmodes or strongest channel paths) are reported first, while lower-priority coefficients are omitted or reported with lower precision. This segmentation allows the system to maintain accurate channel state information for the most critical components while reducing overall feedback overhead by excluding less significant coefficients.

The patent extracts and reports only the most essential precoder coefficients that contribute most significantly to channel state accuracy. By identifying and extracting the dominant coefficients (e.g., through eigenvalue decomposition or singular value decomposition of the channel matrix), the system achieves accurate CSI feedback with substantially reduced payload size, as only the extracted key coefficients are transmitted rather than all coefficients.

The patent divides the precoder coefficient set into multiple subsets with different priority levels, where each subset corresponds to coefficients of varying importance for MIMO performance. This segmentation enables the UE to perform simplified computations by focusing only on generating and reporting high-priority coefficients, thereby reducing computational complexity while maintaining sufficient precision for effective downlink MIMO operation.

The patent applies partial action by reporting only a subset of precoder coefficients rather than all coefficients. Specifically, it reports coefficients that provide sufficient accuracy for practical MIMO performance without the excessive computational burden of processing and reporting the complete coefficient set. This partial reporting achieves the necessary precision for manufacturing-quality MIMO while keeping device complexity manageable.