Performance Analysis and Comparison between the Uncoded OIDMA and Convolutional Coded OIDMA

Abstract

Convolutional coding technique is a low rate coding technique. Optimum multiple channel capacity is achievable only when entire bandwidth is devoted to coding. For maximizing the coding gain the combination of two operations coding and spreading using low rate codes are done. The implementation of convolutional codes in an optical IDMA system provides significant improvement in system performance. Optical interleavedivision multiple-access (OIDMA) scheme inherits the advantage of both Optical system and IDMA technique. For pulse propagation in optical fiber, the nonlinear linear Schrodinger equation (NLSE) is used. OnOff keying (OOK) is used for pulse transmission. It is demonstrated that Convolutional Coded optical IDMA has better bandwidth utilization and less multiple access interference. Convolutional Coded Optical IDMA technique shows that high performance can be maintained with large number of users.