Patent ID: 8971425
Filing Date: 2015-03-03
Classification: H04B

Abstract:
1. A method for relaying performed by a relay station, the method comprising: receiving a signal from a source station through at least one receive antenna; processing the signal by using a midcoding matrix for defining a connection structure between the at least one receive antenna and at least one transmit antenna, and, the midcoding matrix being changed according to a specific rule; and transmitting the processed signal to a destination station through the at least one transmit antenna, wherein the midcoding matrix is changed when the relay station receives a message for requesting a change of the midcoding matrix from the source station, wherein the midcoding matrix is changed by the relay station in association with a change of a precoding matrix of the source station to find a combination of the midcoding matrix and the precoding matrix, and wherein, when the precoding matrix and the midcoding matrix are expressed by direction vectors along a circumference from an origin, the combination is found by a clockwise or counterclockwise rotation.