FPGA Implementation of a Novel Construction of Optical Zero-Correlation Zone Codes for OCDMA Systems

Abstract

This paper proposes a novel method for constructing optical zero-correlation zone (OZCZ) codes based on the Mutually Orthogonal Complementary Sets (MOCS) matrix and the concatenation operation. The most important property of the obtained codes is that the periodic correlation function of the proposed codes is zero for the phase shifts within the zero-correlation zone. The procedure of construction is simple, flexible and offers increasing number of users \left( {M = {2^{n + 1}}} \right). In the other hand, we have presented a fully reconfigurable hardware implementation based on very high description language of the proposed OZCZ codes for optical code-division multiple-access encoder system. The implementation is performed on an Altera field-programmable gate arrays device using ROM memory and an up counter. The simulation results have been found satisfactory and are in conformity with the theoretical observations.

Opto-Electronics Review

“…Nonetheless, OCDMA system performance is limited by a multiple access interference (MAI) impact. Numerous one-(1D) [10][11][12][13][14], two-(2D) [15][16][17], and three-(3D) [18] dimensional code schemes have been proposed in the literature review to eliminate the MAI where it is necessary to choose a good family of optical codes admitting a large number of users with a high weight and good auto and cross-correlation properties [less periodic cross-correlation function (PCCF) and periodic auto correlation function (PACF)].…”

Enhancing confidentiality protection for ZCZ-OCDMA network using line selection and wavelength conversion based on SOA

“…Optical Code Division Multiple Access (OCDMA) schemes have recently garnered significant interest because of their inherent capability of multiplexing multiple users on the same asynchronous access network, secure network connection, flexibility and multimedia services. Numerous parameters such as simultaneous number of active users and the type of codes govern transmission performance analysis of the OCDMA systems [1,2].…”