1. A method in a user equipment of reporting multi-beam channel state information, CSI, in uplink control information, UCI, the method including:providing an indication of a plurality of beam index pairs in the UCI in a first transmission, each beam index pair corresponding to a beam k;
providing an indication of at least one of a beam power, a beam rotation and a channel quality index, CQI, in the UCI in a second transmission; and
a beam power pk of a beam k is a real number such that a cophasing factor ck can be expressed ck=c?kpk, where |c?k|2=1 and at least one of beam rotations r1 and r2 are real numbers such that beam directions for beam k, ?1,k and ?2,k can be expressed as ?1,k=??1,k+r1 and ?2,k=??2,k+r2.