BEAMFORMING WITH QUADRATIC COMPUTATIONAL COMPLEXITY IN THE ANTENNA ARRAY SIZE

摘要

A beamforming method is provided. The method includes determining an initial parameter set, the initial parameter set including an initial time-frequency set (t₀, f₀) and an initial inverse total interference matrix (I.). The method includes, for a given time-frequency set (t, f), performing the following steps: (1) Performing uplink measurements. (2) Computing a channel error contribution (II.) based on the uplink measurements. (3) Computing an interference matrix contribution (III.) based on the uplink measurements. (4) Computing an inverse total interference matrix (IV. ) based on the inverse total interference matrix ((IV.) ) at a previously-computed time-frequency set (t', f) and at least one of (II.) and (III.). (5) Computing a beamforming transceiver solution (Wt,f) based on at least the inverse total interference matrix ((IV.) ).