Patent ID: 9391730
Filing Date: 2016-07-12
CPC Classification: H04B,H04J,H04L

Claim Text:
1. An interference alignment method of a base station in a wireless communication system including a first base station managing a first cell and a second base station managing a second cell, the method comprising: measuring, at the first base station, a channel of a serving base station and interference channel of neighbor base station from terminals located in the first and second cells; generating an interference alignment plane based on a result of the measurement; calculating a transmission precoder, based on the interference alignment plane, for the terminal located in the second cell, the transmission precoder preventing the terminal located in the second cell from being influenced by interference a channel from the first cell to which the interference alignment plane is applied; and transmitting the transmission precoder to the terminal located in the second cell, wherein the interference alignment plane is generated by mapping a predetermined column of a null space matrix orthogonal with the interference channel to a predetermined row of the interference alignment plane.