Patent ID: 7885349
Filing Date: 2011-02-08
Classification: H04B,H04L

Abstract:
1. A method for transmitting data from a transmission end device to a reception end device in a Multi-Input Multi-Output (MIMO) system using a plurality of sub-carriers, the method comprising: determining a precoding matrix as a first part of a phase-shift-based precoding matrix; determining a first diagonal matrix for a phase shift as a second part of the phase-shift-based precoding matrix; determining a unitary matrix as a third part of the phase-shift-based precoding matrix; and precoding by multiplying the phase-shift-based precoding matrix by a transmission symbol according to a resource, wherein the phase-shift-based precoding matrix is determined by multiplying the precoding matrix, the first diagonal matrix, and the unitary matrix, and wherein the precoding matrix is selected from only a portion of the precoding matrixes included in a first codebook predetermined between the transmission end device and the reception end device.