Patent ID: 8606175
Filing Date: 2013-12-10
Classification: H04B

Abstract:
1. A method of removing an interference signal of an electromagnetic wave (EM) level that is received through an interference channel in a RF relay of a full-duplex that relays a radio frequency signal between a base station and a terminal, the method comprising: estimating a modulation channel between the base station and the RF relay and between the RF relay and the terminal, and an interference channel, generating a first conversion matrix to satisfy an objective function and a power constraint using the estimated modulation channel and the interference channel; generating a projection matrix to a null space of a channel matrix of the interference channel, the projection matrix being different than the first conversion matrix; generating a second conversion matrix by multiplying the first conversion matrix by the projection matrix; generating a transmitting signal by converting a received signal using the second conversion matrix; and transmitting the transmitting signal.