METHODS AND APPARATUS FOR BEAMFORMING

摘要

Systems and techniques for beamforming are disclosed. Codebook antenna ports, such as ports defined by the 8 transmit antenna LTE codebook, are mapped to sub-elements of an antenna array arranged to form a plurality of elevation and azimuth ports, such as 4 elevation and 2 azimuth ports or 2 elevation and 4 azimuth ports. The mapping is chosen so as to optimize performance. Phasing values may also be applied to signal components provided as inputs to the sub-elements, with the values chosen to maximize performance, such as rank 1 gain or rank 2 or higher performance.