Spectrum delivery function in distributed antenna system using Radio on Free Space Optics for indoor WLAN

This letter proposes a spectrum delivery function in distributed antenna system (DAS) using Radio on Free Space Optics (RoFSO) for indoor wireless local area network (WLAN). RoFSO can transfer various kind of radio services on optical wireless carrier, and spectrum delivery function realizes efficient utilization of radio frequency (RF) resources. Numerical calculations show that the improvement in throughput performance can be obtained when users are locally concentrated, and RF resources are fairly used in terms of fairness index.