Patent ID: 8837393
Filing Date: 2014-09-16
Classification: H04B

Abstract:
1. A method for data transmission performed by a user equipment in a wireless communication system, wherein a radio resource for data transmission includes M data symbols (M≧3, where M is a natural number) in a time domain, and the radio resource for data transmission further includes a demodulation reference signal (DMRS) symbol for a demodulation reference signal in the time domain, and the method comprising: transmitting first data by using a space-time block coding (STBC) scheme through N data symbols out of the M data symbols (N<M, where N is a natural number) using two transmission antennas, the N data symbols forming at least one symbol pair; and transmitting second data by using a cyclic delay diversity (CDD) scheme through M−N data symbols excluding the N data symbols using the two transmission antennas, the M−N data symbol being residue data symbols that cannot form the at least one symbol pair, wherein the CDD scheme is a transmit scheme that a signal obtained by inserting a cyclic prefix (CP) in a baseband signal is transmitted through a first antenna among the two transmission antennas, and a signal obtained by cyclically delaying or linearly delaying the baseband signal by a cyclic delay value and by inserting the CP in the baseband signal is transmitted through a second antenna among the two transmission antennas, wherein the demodulation reference signal uses a cyclically shifted sequence obtained by cyclically shifting a base sequence by a cyclic shift amount, and wherein the cyclic delay value used for the CDD scheme is associated with the cyclic shift amount used for the demodulation reference signal.