In this paper the performance of two coding techniques named Modified Prime Sequence Codes (MPSC) and Superimposed Cyclic Optical Orthogonal Codes (SCOOC) is compared for Optical Code Division Multiple Access (OCDMA) system. A realistic simulation model of OCDMA system is designed for analyzing the performance of these codes. The performance analysis in terms of bit error rate, quality factor i...

Optical Code Division Multiple Access (OCDMA) is the technique to share a wide bandwidth among a large number of users, OCDMA combines high bandwidth Fiber optic media with flexibility of OCDMA, to provide high-speed connectivity. Multiple Access Interference (MAI) is the main source of performance degradation in OCDMA system .MAI is such a type of interference which caused by multiple cellular...

This paper simulates and analyzes noise of multimedia transmission in a flexible optical code division multiple access (OCDMA) computer network with different quality of service (QoS) requirements. To achieve multimedia transmission in OCDMA, we have proposed strict variable-weight optical orthogonal codes (VW-OOCs), which can guarantee the smallest correlation value of one by the optimal desig...

The need for high speed communications networks has led the research communities and industry to develop reliable, scalable transatlantic and transpacific fiber-optic communication links. In this paper the optimum Golomb ruler based 2D OCDMA codes has been demonstrated. An OCDMA system based on the discussed 2D codes is designed and simulated on Optisystem. The encoder and decoder structure of ...

This paper presents the comparative performance of two detection schemes based on subtraction detection technique for a hybrid scheme of subcarrier multiplexed spectral-amplitude-coding optical code division multiple access (SCM SAC-OCDMA) system. SAC-OCDMA systems are receiving more attention because of their ability to completely eliminate multi access interference by using code sequences wit...

Several channel interference cancelation techniques have been proposed in different journals aiming at lowering to asymptotic bit error floors in optical OCDMA systems. These interference cancellation techniques are classified into two groups. One is based on the use of properties of sequence codes and another is based on the use of non linear elements in OCDMA systems. Optical hard-limiter is ...

Introduction: Optical code-division multiple-access (OCDMA) is receiving increasing attention with several groups pushing to realise Gbit=s multi-user demonstrations [1–8]. Among other possible advantages provided by OCDMA, its potential for enhanced information security is frequently mentioned. This is plausible at first glance considering the OCDMA encoded signal manifests itself as noise-lik...

We theoretically propose and demonstrate experimentally a Coherent Direct Sequence OCDMA en/decoder for multi-channel WDM operation based on a single device. It presents a broadband spectral envelope and a periodic spectral pattern that can be employed for en/decoding multiple sub-bands simultaneously. Multi-channel operation is verified experimentally by means of Multi-Band Super Structured Fi...

In this paper, we have compared the performance of a Turbo and Trellis coded optical code division multiple access (OCDMA) system. The comparison of the two codes has been accomplished by employing optical orthogonal codes (OOCs). The Bit Error Rate (BER) performances have been compared by varying the code weights of address codes employed by the system. We have considered the effects of optica...

A two dimensional spectral/spatial cyclic shift (2D-CS) optical code division multiple access (OCDMA) systems is proposed for a potentially next generation passive network (NG-PON) implementation called (2D-CS NG-OCDMA-PON) system. The2D-CS characterized by high capacity and zero cross correlation property leads to completely eliminating the interference (MAI) effect that considered as main OCD...