Millimeter wave transmission systems offer a multi-gigabit data transmission with beamforming toward the user direction to compensate for the large propagation loss. However, the abrupt performance degradation due to human blockage is still a critical problem, thus utilizing the possible reflected paths when blockage occurs should be considered. In this study, a link contextaware millimeter-wave beam switching system for the base station was developed where using the point cloud data of the environment captured by a depth-sensor the human shadowing is detected and beamforming is adapted toward the best reflected path based on the ray-tracing.
M. Kim, H. Momose, T. Nakayama, “Development of Link Context-Aware Millimeter-Wave Beam Switching System using Depth-Sensor,” 2018 International Symposium on Antennas and Propagation (ISAP 2018), Oct. 2018.
T. Nakayama, M. Kim, “Ray Tracing Assisted Mm-Wave Switched Beamforming,” The 32nd International Technical Conference on Circuits, Systems, Computers, and Communications of 2017 (ITC-CSCC 2017), Jul. 2017.