Hybrid Beamforming Technology in 60 GHz Millimeter Wave Uplink Communication System

A hybrid beamforming technology for 60 GHz uplink communication system is proposed in order to compromise between performance and complexity. The beam-switching by a predefined beam codebook is applied at the transmitter, while DOA estimation based on the codebook and the optimum beamforming are used at the receiver. Meanwhile an improved Least Mean Square (LMS) algorithm is designed, which is able to increase the iterative performance effectively by providing the initial value. The simulation results show the hybrid beamforming algorithm, especially the improved LMS, can significantly enhance the SINR performance of receiver signal.