TECHNIQUES FOR PRECODING BEAMFORMING DATA BASED ON EIGENVALUES APPROXIMATION

摘要

The disclosure relates to a wireless communication device (300), comprising: a processor (301), configured: to precode beamforming data for transmission over a multiple input multiple output (MIMO) channel, the precoding based on an estimated channel matrix (C), and to adjust the precoding based on decomposition, in particular singular value decomposition of the channel matrix (C), comprising: transforming the channel matrix (C) to a bi-diagonal matrix (R); and zeroing off-diagonal elements of the bi-diagonal matrix (R), wherein the zeroing comprises deriving a transform matrix (T) from the bi-diagonal matrix (R) and approximating eigenvalues of the transform matrix (T) by elements on the main diagonal of the transform matrix (T).