Synchronous fibre-optic code division multiple access networks with error control coding

For a fibre-optic synchronous code division multiple access (S/CDMA) network, the number of users able to simultaneously utilise the network is a major concern. A theoretical analysis of the S/CDMA network employing error control codes to enhance the reliability of the network and to increase the number of concurrent users is presented. The error probabilities for both the uncoded and coded systems are analysed. The example shows that by using a (63, 36) BCH code the influence of interference arising from other users can be greatly reduced and the number of active users can also be increased significantly.