Tilt Angle Optimization in Dynamic-TDD mmWave Cellular Scenarios

With the introduction of massive MIMO and directional transmission, antenna configuration has arisen as a major factor influencing coverage and capacity in mobile networks of 5-th generation. In particular, mechanical tilting can yield performance advancement unreachable solely by electronic steering, due to the presence of grating lobes and antenna pattern attenuations. In this letter, the performance of mmWave cellular systems is evaluated in terms of SINR when an adjacent-channel node is interfering the Uplink (UL) transmission. We examine a mobile scenario complete with dynamic-Time Division Duplexing (TDD) and we highlight how the optimization of the antenna tilt angle can drastically improve the overall network performance. Antenna down-tilt can be properly optimized accordingly with both the environment and antenna settings, thus reducing the overall interference level. Our evaluation allows grasping knowledge on the best tilting configuration that should be used accordingly with the scenario considered.