Radio on fiber (RoF) - distributed antenna system (DAS) over wavelength division multiplexing - passive
optical network (WDM-PON) with multiple - input multiple - output (MIMO) has been proposed as a next
generation radio access network (RAN). This system employs optical time division multiplexing (OTDM)
over one WDM channel to multiplex and transmit various types of wireless interfaces such as 3.9G, Wireless
LAN and WiMAX. A combination of star and bus topologies has employed to cover a wider service area. The
optical transmission loss is caused notably at remote base stations (RBSs) quipped on a WDM bus link. The
loss is relatively small, but at the RBS far from the center station (CS), the RBS suffers the large accumulated
loss, so the reduction of cell size provides the increasing of the number of RBSs, causes the degradation of the
SNR of RoF link. This paper addresses this trade-off problem, and considers the application to the actual
service area by the channel capacity investigation of RoF-DAS over WDM-PON with computer simulation.
Then, this paper focuses on the flexibility of RoF-DAS over WDM-PON, considers the adaptive wireless cell
configuration according to population fluctuations of day and night, or densely populated areas and sparsely
populated areas, respectively.