IMU Performance 5 Wearable sensors 4 Degrees of freedom (mechanics) 3 Machine learning 3 Biomechanics 2 Decision trees 2 Front end 2 Gait 2 Inertial measurements units 2 Iterative methods 2 Kalman filters 2 LiDAR 2 ML 2 Optical radar 2 Perceptually degraded scene 2 Robotics 2 SLAM 2 Simultaneous localization and mapping 2 Simultaneous localization and mapping algorithms 2 Six degrees of freedom 2 State estimation 2 Tightly-coupled 2 Underground tunnels 2 Walking aids 2 machine learning 2 perceptually degraded scenes 2 state estimation 2 3D joint kinematics 1 3d joint kinematic 1