Patent ID: 7457372

Claim:
An apparatus for transmitting data in a mobile communication system including at least three transmission antennas of first to third transmission antennas, and using an overlapped antenna scheme for grouping the first and second transmission antennas into a first transmission antenna group and grouping the second and third transmission antennas into a second transmission antenna group, the apparatus comprising: first and second modulators for receiving L information bit streams to be transmitted through the first transmission antenna group, modulating each of the L information bit streams in a predetermined modulation scheme, and outputting first and second modulated symbol streams; third and fourth modulators for receiving L other information bit streams to be transmitted through the second transmission antenna group, modulating each of the L information bit streams in the predetermined modulation scheme, and outputting third and fourth modulated symbol streams; first to fourth puncturers for receiving the first to fourth modulated symbol streams, respectively, and puncturing at least one modulated symbol in a predetermined position among the received first to fourth modulated symbol streams so that an interference component between the second puncturer and the third puncturer is eliminated; and a multiplexer for transmitting a modulated symbol stream output from the first puncturer through the first transmission antenna, transmitting a modulated symbol stream output from the second puncturer and a modulated symbol stream output from the third puncturer through the second transmission antenna after summing up the modulated symbol streams, and transmitting a modulated symbol stream output from the fourth puncturer through the third transmission antenna.