An efficient SAGE-based data detection algorithm for OFDM systems in the presence of very fast fading channels

In this paper, an iterative and computationally efficient data detection algorithm is proposed based on the space alternating generalized expectation maximization (SAGE) technique for orthogonal division multiplexing (OFDM) systems under fast fading channels. The proposed detector includes the original detector presented in [1] as one of its special cases. With a proper choice of its parameters, simulations show that the new detector has negligible performance loss than original one in [1] with smaller number of iterations.