Two-Stage Rotation-Based Joint ToA-AoA Estimation for Spatial Wideband Systems
The research addresses estimating Angle of Arrival (AoA) and Time of Arrival (ToA) in wireless systems using spectral estimation, particularly for mmWave/THz channels where spatial delays are significant. The core contribution is a two-stage rotation algorithm that first identifies the correct coarse spatial bin and then fine-tunes it to obtain high-resolution signatures, effectively overcoming the Spatial Wideband Effect.