Patent ID: 8385957
Filing Date: 2013-02-26
Classification: H04L

Abstract:
1. A base station apparatus, comprising: a receiving unit configured to receive, from a terminal, quantized channel state information with respect to a radio channel from a plurality of transmission antennas of the base station apparatus to a plurality of receiving antennas of the terminal; a channel matrix generating unit configured to generate a radio channel state matrix with respect to the radio channel based on the received quantized channel state information; a singular value decomposing unit configured to perform a singular value decomposition with respect to the radio channel state matrix; a control unit configured to determine a control ratio of interference signal to noise with respect to the radio channel based on the singular value of the radio channel state matrix; a precoding matrix computing unit configured to compute a precoding matrix based on the control ratio of interference signal to noise; and a transmission unit configured to transmit data to one or more terminals using the precoding matrix.