Performance enhancement of OCDMA system based on 3D-Multi-Diagonal codes

A new family for three dimensional (3D) Optical Code Division Multiple Access using Multi-Diagonal (MD) code is developed. It is characterized by a large cardinality, high autocorrelation and zero cross correlation. So, the multi-access interference (MAI) is totally eliminated. Mathematically, it is seen that the correlation property of the proposed 3D code depends on the code weights of different sequence code used for its construction. For results, the 3D-MD has a better performance than the one and two-dimensional (1D and 2D) codes. The importance of introducing the 3
^rd
dimension is justified by the high signal to noise ratio (SNR) and low bit error rate (BER) compared to 1D and 2D MD codes.