부산대학교 도서관

To meet the rapidly increasing demand for commercial broadband wireless services, layered division multiplexing (LDM) was proposed for the next generation digital TV (DTV) standard. By non-orthogonally superimposing several services with different data rates, LDM can provide better spectral efficiency (SE) and more robust performance compared to some traditional orthogonal division multiplexing schemes. In this paper, the achievable SE of a two-layer LDM system is analyzed via its mutual information (MI). Because the MI lacks a closed-form formulation, we verify it through the Monte Carlo (MC) simulation and propose its calculable lower bound to avoid the huge computational complexity. Simulation results confirm our SE analysis and proposed lower bound of the system's MI.