13GPP TS 36.211. Evolved Universal Terrestrial Radio Access(E-UTRA); Physical Channels and Modulation, 2012.
2Zhou Shengli, Giannakis G B. Optimal transmitter eigten-beamforming and space-time block coding based on channelcorrelations. IEEE Transactions on Information Theory, 2003, 49(7):1673-1690.