Performance Evaluations of Digital Modulation on Optical Carriers of Spectral-Amplitude-Coding over Radio-over-Fiber Network

A Radio-over-fiber (RoF) network based on optical code-division multiple access (OCDMA) of spectral-amplitude- coding (SAC) is proposed to provide digital modulations on optical coded carriers. Efficient data transmissions between radio base stations (RBSs) and central offices (COs) are supported. Optical carriers are coded with signature codes having pseudo orthogonal property so that the desired user can be identified without multiple access interference (MAI) in the uplink and downlink channels. Due to the distinct correlation properties of the used codes, different bit-error rates (BERs) can be measured at the decoders.