Amir Valizadeh Amir Valizadeh, Mehdi Seyfi, Ali Rafiei, A Fast Signal Subspace Tracking Algorithm Based on a Subspace Information Criterion Amir Valizadeh, Mahmood Karimi, Ali Rafiei, Near Field Source Localization and Tracking Using a Passive Sensor Array Amir Valizadeh, A Constrained Optimization Approach for an Adaptive Generalized Subspace Tracking Algorithm