2D Generalized Optical Spatial Modulation for MIMO-OWC Systems

In this paper, a novel two-dimensional (2D) generalized optical spatial modulation (GOSM) scheme is proposed for multiple-input multiple-output wireless communication (MIMO-OWC) systems. By grouping multiple successive time slots as one block, 2D GOSM mapping can be performed not only in the space domain but also domain. Specifically, two types of schemes are designed, including 2D-1 and 2D-2 mappings. Moreover, to address high complexity issue optimal joint maximum-likelihood (ML) detection noise amplification error propagation issues zero-forcing-based ML (ZF-ML) detection, deep neural network (DNN)-aided further designed Simulation results demonstrate superiority with learning-aided high-speed low-complexity MIMO-OWC More specifically, remarkable 3.4-dB signal-to-noise ratio (SNR) gain achieved by comparison conventional one-dimensional (1D) GOSM, when applying DNN-aided detection.