Patent ID: 9184808
Filing Date: 2015-11-10
Classification: H04B,H04L

Abstract:
1. A wireless transmit/receive unit (WTRU) configured for multiple-input multiple-output (MIMO) communication in a single carrier frequency division multiple access (SC-FDMA) system, the WTRU comprising: a first set of fast Fourier transform (FFT) units configured to perform FFT on data for transmission to generate frequency domain data; a receiver configured to receive feedback from a receiving device, the feedback including an indication of a steering matrix (V) from the receiver, the steering matrix determined based on a decomposition of a channel matrix (H) of a channel between the WTRU and the receiving device, and an indication of a diagonal matrix (D), the steering matrix (V) including eigenvectors of a matrix formed by a product of a Hermitian transpose of the channel matrix (H) and the channel matrix (H), and the diagonal matrix (D) including a square root of the eigenvalues of a product of the channel matrix (H) and the Hermitian transpose of the channel matrix (H); a plurality of subcarrier mapping units configured to map the frequency domain data on subcarriers assigned for transmission; a beamformer configured to scale the frequency domain data with at least one of: an inverse of the diagonal matrix (D) or a minimum mean square error (MMSE) matrix, the MMSE matrix determined based in part on the steering matrix (V) and the diagonal matrix (D), and apply the steering matrix to the scaled frequency domain data; and a first set of inverse Fourier transform (IFFT) units configured to perform IFFT on the beamformed frequency domain data to generate time domain transmit data.