Performance of current digital pulse modulation schemes for optical wireless communications

In this paper, the performance of current digital pulse modulation schemes for optical wireless communications was examined by simulation, and we concluded that PPM is suitable for long distance optical wireless communication systems especially for military use due to its best power efficiency and also suitable for optical wireless communication systems working near sea surface; DPIM and DH-PIM are suitable for normal outdoor applications, for example, being used in city or suburb, for its moderate performance and no need of symbol-level synchronization; MPPM is especially suitable for indoor optical wireless communication systems with diffused channel due to its best bandwidth efficiency. (4 pages)