Wideband DOA estimation in dispersive medium

The problem of direction-of-arrival (DOA) estimation in dispersive medium is considered in this work. For accurate localization of the sources in seismic and underwater acoustic applications, speed profile is estimated and employed. In contrast to this approach, we propose a new algorithm for wideband DOA estimation with unknown speed profile across the source bandwidth. This insensitivity to dispersion is accomplished by incorporating soft derivative constraint into the optimization problem. The presented simulations exhibit the effectiveness of the proposed algorithm in estimating the source directions in dispersive medium.