Patent ID: 8705510

Claim:
A method for transmitting feedback information at a User Equipment (UE) in a wireless communication system operating in a Base Station (BS) cooperative mode, the method comprising: estimating a channel between the UE and each BS using a channel measurement signal received from each BS operating in the BS cooperative mode; selecting a multi-BS precoding matrix from a predefined multi-BS precoding matrix codebook based on the estimated channel; and transmitting identification information of the selected multi-BS precoding matrix to a serving BS, wherein the predefined multi-BS precoding matrix codebook is configured to include row precoding matrices of one or more same rows, column precoding matrices of same columns that are identical to each other, and a coefficient matrix having a unitary property, and wherein the row precoding matrices of the predefined multi-BS precoding matrix codebook are selected from a predefined single-BS precoding matrix codebook such that a subspace distance between precoding matrices of the predefined single-BS precoding matrix codebook is maximized.