methods for a radio network node, wireless device, base station, and user equipment, radio network node, wireless device, base station, user equipment, carrier, and, readable memory. non-transient computer

摘要

A method of determining a precoder from a first codebook is described, wherein said precoder determination comprises measuring on a set of beamforming antenna ports, and wherein the precoders in the first codebook share a or more common components with the coders in a second multibeam codebook and wherein determining the coders from the second codebook comprises measuring over a larger set of typically unprecoded antenna ports.