Patent ID: 9160432
Filing Date: 2015-10-13
Classification: H04B,H04W

Abstract:
1. A communication method for a cognitive radio (CR) base station in a multi-user multiple-input multiple-output (MIMO) CR communication system including the CR base station and CR terminals, the method comprising: calculating, from an interference channel, an orthogonal projection matrix to be used for removing interference on a primary user through use of a zero forcing (ZF) processing scheme; and obtaining a beamforming weight vector for each of the CR terminals, through use of the orthogonal projection matrix, wherein the obtaining comprises obtaining a beamforming vector using a generalized singular value decomposition (GSVD)-based algorithm that maximized signal-to-leakage-and noise ratio (SNLR) for each of the CR terminals, through use of the orthogonal projection matrix.