Apparatus and method for transmitting and receiving signal in multiple input multiple output system

An apparatus for receiving a signal in a MIMO system, the apparatus comprising:

• NR receive antennas, each to receive a multiple signal having a transmit diversity gain, where NR is an integer greater than or equal to 2;
• and
• a cyclic prefix (CP) removal unit to remove a CP in the multiple signals having the transmit diversity gain,
• wherein the multiple signals having the transmit diversity gain are signals generated by applying a cyclic delay of a different pattern to each of NT symbol streams, and transmitted via NT transmit antennas, respectively, where NT is an integer greater than or equal to 2.

A method of transmitting a signal in a MIMO system, the method comprising:

• receiving NT symbol streams in parallel, where NT is an integer greater than or equal to 2;
• generating NT cyclic delay signals by applying a cyclic delay of a different pattern to each of the NT symbol streams;
• generating NT multiple signals having a transmit diversity gain by coupling the NT cyclic delay signals;
• and
• providing the generated NT multiple signals to NT transmit antennas, respectively, based on a transmit antenna index of each of the NT transmit antennas.