Multi beam forming by partial channel state information

Method of determining the precoding information for beam shaping between a sender and receiver, first flop of the first signal layer based on the channel part channel state information between a sender and a receiver It includes determining the recording vector. The method also includes determining a first guess vector based on the long term characteristics of a channel between the sender and receiver. It defines a group of senders of antennas, and specifies a phase shift value for each group of antennas. The method further to the elements of the first guess vector, second-flop of the second signal layer by multiplying the phase shift value specified for a group of related antenna to the elements of the first guess vector also it includes determining recording vectors in the sender. .FIELD 4