FIELD: radio engineering, communication.
SUBSTANCE: receiver, based on the reference signal, is selected from the codebook by the precoding matrix W, in order to perform the phase adjustment for ϕn in matrix W the coefficient α, ϕn represents the phase difference between the weighted values of the first and second antenna groups of the transmitter for the transmission signal from the same transmission layer. The first and second groups of antennas belong to the same multi-antenna system; and the receiver sends a pointer to the precoding matrix (PMI-pointer) to the transmitter so that the transmitter determines W in accordance with this PMI-pointer.
EFFECT: increasing the codebook and improve the accuracy of feedback.
16 cl, 26 dwg, 6 tbl
