Apparatus and method for transmitting and receiving data using an antenna array in a mobile communication system

An apparatus for receiving data at a receiver including a plurality of second antennas from a transmitter including a plurality of first antennas on a plurality of radio channels in a mobile communication system, comprising:

• a channel estimator for determining statuses of the radio channels;
• a data classifier for classifying high-priority data and low-priority data received through the second antennas according to the channel statuses;
• and
• a demodulator for demodulating the high-priority data and the low-priority data separately,
• wherein the high-priority data is systematic coded bits and the low-priority data is parity coded bits.

A method of transmitting data in a mobile communication system using multiple transmission antennas, comprising the steps of:

• estimating transmission status for each transmission antenna;
• classifying transmission data groups as a different data group according to priority of data to be transmitted;
• and
• assigning the transmission data groups to each transmission antenna according to the transmission status of the transmission antennas and the priority of the transmission data groups, wherein information bits output by encoding the data to be transmitted are classified into the high-priority data groups and parity bits output by encoding the data to be transmitted are classified into the low-priority data groups.

An apparatus for transmitting data in a mobile communication system using multiple transmission antennas, comprising:

• a controller for controlling transmission antennas assignment according to transmission status for each transmission antenna;
• a channel estimator for estimating transmission status for each transmission, and reporting the transmission status to the controller;
• and
• a data classifier for classifying transmission data groups as a different data group according to priority of data to be transmitted, and assigning the data groups having different priority to each transmission antenna by the controller,
• wherein the data classifier classifies information bits output by encoding the data to be transmitted into the high-priority data groups, and the data classifier classifies parity bits output by encoding the data to be transmitted into the low-priority data groups.

A method of receiving data in a mobile communication system using multiple reception antennas, comprising the steps of:

• estimating transmission status for each reception antenna;
• classifying signals received through the reception antennas according to the estimated transmission status, into high-priority data groups and low-priority data groups;
• multiplexing modulation symbols of the high-priority data groups;
• multiplexing modulation symbols of the relatively low-priority data groups;
• and
• demodulating the multiplexed modulation symbols,
• wherein the modulation symbols of the high-priority data groups are information modulation symbols, and the modulation symbols of the low-priority data groups are parity modulation symbols.

An apparatus for receiving data in a mobile communication system using multiple reception antennas, comprising:

• a controller for controlling classification of data groups according to transmission status for each reception antenna;
• a channel estimator for estimating transmission status for each reception antenna, and reporting the transmission status to the controller;
• a data classifier for classifying signals received through the reception antennas by the controller, and multiplexing modulation symbols of the high-priority data groups and modulation symbols of the low-priority data groups;
• and
• a demodulator for demodulating the multiplexed modulation symbols,
• wherein the modulation symbols of the high-priority data groups are information modulation symbols, and the modulation symbols of the low-priority data groups are parity modulation symbols.