MIMO based adaptive beamforming over OFDMA architecture

A wireless communications system combines Multiple Input/Multiple Output (MIMO), beamforming, and Orthogonal Frequency Division Multiple Access (OFDMA) techniques to increase spectral efficiency. A method includes transmitting first data in a first beam of electromagnetic signals focused on a first user equipment and generated by a first antenna array. The first data is associated with the first user equipment. The first data is transmitted using a first OFDMA resource block of a time slot of a radio frame and first beamforming weights. The method includes transmitting second data in a second beam of electromagnetic signals focused on a second user equipment and generated by the first antenna array. The second user equipment is spatially diverse from the first user equipment. The second data is associated with the second user equipment. The second data is transmitted using the first OFDMA resource block of the time slot and second beamforming weights.