A blind receiver for optical code division multiple access communications systems

The application of code division multiple access (CDMA) techniques to a fiber-optic communication systems has aroused much interest. The simplest receiver is the correlation receiver but its performance deteriorates rapidly as the number of users increases. Thus, it is highly desirable to have a better receiver structure for such systems. Many multiuser detection schemes have been proposed. However, multiuser detectors require knowledge of some parameters such as the signature sequence of other users. It would thus be a great advantage if this requirement can be removed. In this paper, we propose a blind receiver that does not require knowledge of the users' system parameters except for those of the desired user. Thereby, significant reduction of the receiver complexity is possible. Performance of the proposed receiver is investigated and comparison of several receivers for OCDMA systems is also presented.