Performance of OCDMA systems with new spectral direct detection (SDD) technique using enhanced double weight (EDW) code

Abdullah, M.K.; Hasoon, Feras N.; Aljunid, S. A.; Shaari, Sahbudin

doi:10.1016/j.optcom.2008.06.029

Cited by 59 publications

(27 citation statements)

References 10 publications

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“…We will use three weights (2,4,6) to differentiate the QoS required for each of them. Higher weight means better quality transmission for the information requiring high priority.…”

Section: Construction Of Variable Weight Deu Codementioning

confidence: 99%

“…In this technique, the clean chips (non-overlapping chips) only are detected, because the data are supposed to be sufficiently recovered from all the chips that do not interfere with other chips from different code sequences. So, there is no need to use any subtraction technique to remove interference from other active users (overlapping chips) [4]. Thus, the number of filters is reduced.…”

Section: Spectral Direct Detection Techniquementioning

confidence: 99%

“…In the OCDMA system, the detection process plays a critical role in the design of transmitters and receivers to eliminate MAI and reduce PIIN. Thus, several detection techniques are used such as complementary, AND, NAND [2], XOR [3] subtraction techniques, and the spectral direct detection (SDD) techniques [4]. They are used with SAC-OCDMA, where every user is allocated a distinct codeword to encode the spectral amplitude of an optical source and represent its address.…”

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of Diagonal Eigenvalue Unity (DEU) Code Using NAND Subtraction and Spectral Direct Detection Techniques and Its Use with Triple-Play-Services in SAC-OCDMA

Mostafa

Mohamed

El‐Samie

et al. 2015

Wireless Pers Commun

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In this paper, we investigate the performance of optical code division multiple access system using the diagonal eigenvalue unity (DEU) code as a promising code for future optical networks. A comparison between the utilization of the NAND subtraction detection technique and the spectral direct detection (SDD) technique is presented to investigate which one provides better performance with the DEU code. In addition, a complete mathematical analysis for the two cases is presented. The performance of the two techniques is evaluated in terms of signal to noise ratio, bit error rate (BER), the effective received power, and phase induced intensity noise. Also, the variable weight DEU code is discussed. It demonstrates success for triple-play services (audio, video, and data) using the SDD technique to provide different quality of service (QoS) values to users. The results show that the SDD technique supports a larger number of users, reduces the receiver complexity, and provides better performance than the NAND subtraction technique. For a minimum acceptable BER of 10 -9 for a telecommunication system, the direct detection technique supports 265 users, while the NAND subtraction supports 150 users only for (weight W = 3). Also, with variable weights in a single system, the performance of users with high weight is always better compared to that of lower weight users.

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“…We will use three weights (2,4,6) to differentiate the QoS required for each of them. Higher weight means better quality transmission for the information requiring high priority.…”

Section: Construction Of Variable Weight Deu Codementioning

confidence: 99%

Section: Spectral Direct Detection Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of Diagonal Eigenvalue Unity (DEU) Code Using NAND Subtraction and Spectral Direct Detection Techniques and Its Use with Triple-Play-Services in SAC-OCDMA

Mostafa

Mohamed

El‐Samie

et al. 2015

Wireless Pers Commun

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“…The performance of the system was evaluated by referring to the bit error rate. At the receiver side, there is only a single decoder and a single detector required [10]. The noise generated at the receivers was set to be random and totally uncorrelated.…”

Section: B the Size Of Matrix [A] Consist Of Ka X Namentioning

confidence: 99%

Implementing EDW in Point to multipoint optical access network for FTTH applications

Zahid

Hasoon

Bakarman

et al. 2009

2009 IEEE 9th Malaysia International Conference on Communications (MICC)

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this paper presents the implementation of enhanced double weight optical code division multiple access codes (EDW-OCDMA) on Point-to-multipoint access network for FTTH applications, the design is based on EDW code. Simulation experiment performed to study the performance of the code, the new algorithm to generate the higher weighted EDW code enable the performance study of EDW in Point-to-multipoint for higher weights too. In this paper there is a new design to implement the code into Point-to-multipoint Access network FTTH. Multiple weighted EDW code implemented and designed to fit into FTTH application. Performance of the code on FTTH is presented through eye diagram and comparison graph from the simulation results.

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“…At the receiver side, there is only a single decoder and a single detector required [9]. The noise generated at the receivers was set to be random and totally uncorrelated.…”

Section: System Performance Analysismentioning

confidence: 99%

New Algorithm for Enhanced Double Weight (EDW) Code for Spectral Amplitude Coding OCDMA System

Zahid¹,

Hasoon²,

Shaari³

2009

Journal of Optical Communications

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This paper presents a new algorithm for enhanced double weight code (EDW-OCDMA). The original code uses a manual code generating method. Therefore it is very difficult to inspect the code for high weights, thus only small weights can be generated. The new algorithm provide mathematical formulas and step sequences to generate the code. This will lead to easily generate the code and in systematic manner. Especially for high code weights. The new method uses shifting. OCDMA simulation experiment is also presented in this paper to investigate the performance at higher code weights.

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Performance of OCDMA systems with new spectral direct detection (SDD) technique using enhanced double weight (EDW) code

Cited by 59 publications

References 10 publications

Performance Analysis of Diagonal Eigenvalue Unity (DEU) Code Using NAND Subtraction and Spectral Direct Detection Techniques and Its Use with Triple-Play-Services in SAC-OCDMA

Performance Analysis of Diagonal Eigenvalue Unity (DEU) Code Using NAND Subtraction and Spectral Direct Detection Techniques and Its Use with Triple-Play-Services in SAC-OCDMA

Implementing EDW in Point to multipoint optical access network for FTTH applications

New Algorithm for Enhanced Double Weight (EDW) Code for Spectral Amplitude Coding OCDMA System

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