Multilevel priority scheme for fiber-optic code division multiple access (CDMA) packet networks

A multilevel priority scheme for fiber-optic CDMA is proposed. Users are divided into groups with different transmission power levels. Since the inherent properties and signal processing of the conventional communication channels are different from those of the fiber-optic channels, new code sequences must be constructed for fiber-optic applications. Furthermore, fiber-optic systems can be modeled as positive systems. Therefore, the packets from higher power groups can transmit successfully with higher probability than those from lower power groups. This implies that packets with higher power levels have higher priority than those packets with lower power levels. The goal of this research is to analyze the performance of fiber-optic CDMA packet networks using code sequences with given orthogonality properties