Diversity combining for mobile FSO nodes in SIMO setup

The term mobile FSO refers to wireless optical nodes with mobility capabilities. Mobile FSO has emerged as a way to combat some of limitations facing FSO links, i.e. incompatibility of transmitters and receivers relative to movement and misalignment. In this paper we utilize an angular diversity model for characterizing the performance of mobile FSO over atmospheric turbulence. Switch-and-examine combining (SEC) technique is our suggestion for the diversity combining solution in such unbalanced multi-transceiving configuration. The channel fading is modeled as a lognormal distribution with spatially correlated samples. Analytical/ statistical discussion on the resultant output is presented and bit error performance and processing load are numerically evaluated and compared to a selection combining (SC) diversity.