Methods and Apparatuses for Feeding Back and Receiving Pre-coding Matrix Indicator and Communication System
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Oct 2, 2017
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Apr 16, 2015
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Methods and apparatuses for feeding back and receiving a PMI and a communication system. The method for feeding back a PMI includes: determining an OFDM PMI of a rank r and an NOMA PMI of a rank Nr by a user equipment; and feeding back the OFDM PMI and the NOMA PMI to a base station; where, r denotes the number of ranks of the user equipment, and Nr denotes a minimum value in the number of receiving antennas of the user equipment and the number of transmitting antennas of the base station. Hence, by providing reference information to the base station for performing an NOMA scheduling, the base station is enabled to schedule appropriate user equipments, so as to ensure SIC performance. Thereby, SIC error propagation may be reduced in an MIMO system using NOMA.
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