Jointly optimal receivers for the optical arbitrary pulse-shape pulse-position modulation channel

We investigate robust optical wireless communication in a highly scattering propagation medium. Two Maximum-Likelihood (ML) detection algorithms and sub-optimal one are presented for any pulse shape pulse position modulation (PPM) in direct-detection optical channel. They are based on the multi-samples per chip, which can give joint estimation of the symbol and the synchronization clock shift. We also present the results of simulations conducted for the proposed detection algorithm.