This paper examines code-division multiple-access (CDMA) techniques used in slotted fiber-optic packet networks. 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. The goal of our research is to analyze the performance of fiber-optic CDMA packet networks using code sequences with given orthogonality properties.

This paper examines code-division multiple-access (CDMA) techniques used in unslotted fiber-optic packet networks. 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. In unslotted systems, the exact solution is very difficult to obtain. Therefore, two approximation methods are presented to analyze the performance of such systems. Simulation is performed to verify the accuracy of the results.

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.>