Patent ID: 7899132
Filing Date: 2011-03-01
Classification: H04B,H04L

Abstract:
1. A method for transmitting a data to a reception end device in a Multi-Input Multi-Output (MIMO) system using a plurality of sub-carriers by a transmission end device, 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 per resource, wherein the phase-shift-based precoding matrix is determined by multiplying the precoding matrix, the first diagonal matrix, and the unitary matrix, wherein the precoding matrix is selected from a first codebook using a modulo operation of a resource index (k) based on a predetermined integer number, and wherein the precoding matrix is cyclically selected from the first codebook not using feedback information received from the reception end device.