USER EQUIPMENT AND METHOD FOR PRE-CODING MATRIX INDEX FEEDBACK

摘要

A novel scheme for Pre-coding Matrix Index (PMI) transmission over Physical Uplink Shared Channel (PUSCH) is provided for Channel State Information (CSI) feedback in dual codebook pre-coding architecture. According to the present invention, the PMI is decomposed into a frequency-selective portion and a non-frequency-selective portion, which are then jointly coded. The frequency-selective portion of the PMI can be one of a beam selection portion and a phase combination portion of the PMI while the non-frequency-selective portion of the PMI can be the other one of the beam selection portion and the phase combination portion of the PMI. The present invention has advantages such as simple implementation and low signaling overhead and is applicable in LTE-Advanced/4G cellular communication systems and future 5G cellular communication system.