Internally bandwidth efficient coded fiber-optic CDMA communication systems with multistage decoding

In this paper, we consider the structure and performance of a multistage decoding scheme for an internally bandwidth efficient convolutionally coded fiber-optic code division multiple access (CDMA) communication system. The decoder is implemented in several stages in which in each stage, the interfering users' coded symbol decisions obtained in the previous stage is applied for computing the likelihood of the coded symbols of the desired user.