Patent ID: 7649831
Filing Date: 2010-01-19
Classification: H04B,H04L

Abstract:
1. A method for feedback and transmission in a wireless communication system, the method comprising: selecting, at a base station, one of a subset codebook and a full codebook, the selected codebook having at least one spatial codeword vector that represents a codeword; broadcasting the selected codebook to at least one user equipment from the base station; calculating, at the user equipment, a channel quality indicator of the at least one spatial codeword vector; sending a feedback signal from the user equipment to the base station, the feedback signal including information of the channel quality indicator of the spatial codeword vector and a preferred precoder of the user equipment; assigning, at the base station, a first spatial codeword vector to the user equipment; transmitting the preferred precoder of the user equipment and data to the user equipment; and selecting, at the user equipment, a largest channel quality indicator among the calculated channel quality indicators, the information of the channel quality indicator included in the feedback signal including the largest channel quality indicator, the assigned first spatial codeword vector corresponding to the largest channel quality indicator for the user equipment.