An Interference Cancellation Approach for MIMO Orthogonal Signal-Division Multiplexing in Time-Varying Channels

Abstract

This work aims to explore Orthogonal Signal-Division Multiplexing, an existing modulation format that was recently introduced in underwater communications [1], [2], [3], with flexible spectrum management and relatively simple equalization techniques. The matrix interpretation of the modulation allows a turbo like receiver to be implemented. A MIMO extension based on interference cancellation is developed to increase the spectral efficiency of the system. The effectiveness of MIMO OSDM is studied here through simulation, to characterize the efficiency of the link as a function of the time-frequency partitioning, as well as the impact of several parameters that control the iterative decoding process at the receiver.