METHOD AND APPRATUS SELECTING TRANSMIT ANTENNA AND ESTIMATING UPLINK MULTIPLE-INPUT MULTIPLE-OUTPUT CHANNELS IN TIME-DIVISION MULTIPLEXING WIRELESS COMMUNICATION SYSTEMS

摘要

In a wireless communication system using a multiple-input multiple-output (MIMO) scheme, a mobile station transmits a downlink signal based on a reference signal (RS) transmitted from each transmission antenna included in a base station. Selects a first transmit antenna that provides the largest uplink channel gain among a plurality of transmit antennas as a transmit antenna to transmit uplink traffic based on the estimated downlink channel information, Determines uplink channel information for at least one remaining transmission antenna except for the first transmission antenna among the plurality of transmission antennas and transmits the uplink channel information and the uplink traffic through the first transmission antenna , The uplink channel information is transmitted using one of a first transmission scheme and a second transmission scheme, Represents a scheme of transmitting the uplink channel information in consideration of a first time interval in which a sounding RS is transmitted and a second time interval in which the uplink channel information is transmitted using the sounding RS, And the second transmission scheme is a scheme of predistorting the sounding RS and transmitting the uplink channel information.;Speed packet communication, mobile communication system, time division multiplexing system, MIMO system, MIMO, channel estimation, transmission antenna selection, sounding RS