ADAPTIVE MULTI-BEAMFORMING SYSTEMS AND METHODS FOR COMMUNICATION SYSTEMS

摘要

A wireless communication system including receiving and base stations. The receiving station (570) includes a detector (590) that measures a downlink channel correlation matrix for multiple antennas (547) of a base station (500). The detector (590) computes an antenna weight increment vector normal to an antenna weight vector for multiple beams from the multiple antennas (547) of the base station (500). The detector (590) quantizes the antenna weight increment vectors to produce a respective quantized antenna weight increment vector. The receiving station (570) includes a transmitter (580) that sends the quantized antenna weight increment vectors to the base station (500). The base station (500) includes a beamformer selector (565) that receives from the receiving station (570) and re-orthogonalizes the quantized antenna weight increment vector for each of the multiple beams. The base station (500) includes a weight vector modifier (567) that modifies the antenna weight vector for the multiple beams by adding an increment proportional to the respective re-orthogonalized quantized antenna weight increment vector.