Patent ID: 7471963
Filing Date: 2008-12-30
Classification: H04B,H04W

Abstract:
1. A mobile station with at least one reception antenna, the mobile station comprising: a channel characteristic determination unit for determining a first characteristic from Pilot Channel (PICH) signals transmitted from a base station, and a channel downlink characteristic for each of at least one transmission antenna of the base station and the at least one reception antenna using the first characteristic; a long-term information determination unit which determines long-term information having effective long-term eigenvectors and effective long-term eigenvalues using the determined channel downlink characteristic; a short-term information determination unit for determining short-term information having effective short-term eigenvectors using the determined channeled downlink characteristic; a downlink power control unit for obtaining downlink power control information including a Signal to Interference and Noise Radio (SINR) which reflects the fist characteristic, using the determined channel downlink characteristic; and a signal conversion unit for combining the determined long-term information, short-term information, and downlink power control information into a feedback signal to be transmitted to the base station; wherein the mobile station is not arranged to transmit eigenvalues corresponding to effective short-term eigenvectors to the base station as part of the feedback signal.