Passive optical network for CDMA-based microcellular communication systems

An analog fiber-optic link transporting the wireless code-division multiple -access (CDMA) signals requires the minimum dynamic range of only about 30 dB, Motivated by this relaxed requirement, we have recently proposed a pass ive optical network for CDMA-based microcellular communication systems. In this paper, we reviewed the basic design rules and demonstrated various net works using double-star and ring architectures, We implemented these networ ks by using inexpensive light sources such as a Fabry-Perot laser (for down stream) and light-emitting diodes (for upstream). The results show that the se networks could support more than eight remote base stations located with in similar to 10 km from the central base station.