To enable high speed and reliable transmission for non-line-of-sight scenarios in 60GHz millimeter-wave wireless personal area networks, a novel relaying-assisted network model with asymmetrical transceiver architecture is considered. Based on the asymmetrical transceiver architectures, we propose a new analog and digital hybrid beamforming protocol, in which relay is capable of both phase and amplitude modification, while user terminals are only enable to shifter phases. The proposed protocol targets to reduce computational complexity and cost, and to increase precision for beamforming without a priori knowledge of channel state information or relying on high antenna configurations. Through numerical simulations, we confirm that the proposed solution shows the system performances on channel gain, coverage probability and spectral efficiency, surpassing analogonly beamforming without increasing algorithm complexity.
['Hongyun Chu', 'Pingping Xu', 'Chencheng Yang', 'Youhua Fu']
Asymmetrical and hybrid beamforming for SDMA in relaying-assisted mmW WPANs