METHOD AND DEVICE FOR SENDING AND RECEIVING PRECODED SIGNALS ON A WIRELESS COMMUNICATION SYSTEM

摘要

The present invention relates to a wireless communication system, and, more specifically, disclosed are a method and device for sending and receiving precoded signals. According to one embodiment of the present invention, a method whereby a sending station transmits a precoded signal on a wireless communication system that supports multiple-antenna transmission comprises the steps of: determining a first matrix from a first codebook containing precoding matrices in which a first precoding matrix indicator is indicated, determining a second matrix from a second codebook containing precoding matrices in which a second PMI is indicated, and determining a precoding matrix based on the first matrix and the second matrix; carrying out precoding by using the precoding matrix so determined in at least one layer where the signal to be transmitted is mapped; and transmitting the precoded signal to a receiving station. The precoding matrices contained in the first codebook may respectively be constituted from a block diagonal matrix, and the blocks of the block diagonal matrix may be constituted independently from each other, while the precoding matrices contained in the second codebook may respectively be constituted from an ancestor element and a child element, and the child element may comprise a phase rotation value.