Informatics Publishing Limited

S. K. Sriwas ¹, M. Shukla ², R. Asthana ², J. P. Saini ¹

Affiliations
1 Department of Electronics and Communication, BIET, Jhansi – 284128, Uttar Pradesh, IN
2 Department of Electronics, HBTI, Kanpur – 208002, Uttar Pradesh, IN

Abstract

Objective: To execute the Avalanche photodiode instead of a PIN photodiode in Optical Interleave Division multiple Access (O-IDMA) communication system and to analyze the performance for high data rate transmission. Methods/Statistical Analysis: The detection of optical signal at the receiver of the O-IDMA system is an important operation and decides the performance of the system. Here the detection is done using Avalanche Photodiode for O-IDMA system and analyzed. Iterative decoder is used for decoding at the receiver using the soft decision method. MATLAB is utilized as a simulation tool. Findings: The simulation results have been demonstrated that Avalanche Photodiode is appropriate than PIN Photodiode. The completion and efficiency of the O-IDMA system can be ameliorated with the utilization of avalanche photo detector. Applications/Improvements: The completion of the O-IDMA system is ameliorated appreciably by utilizing Avalanche photodiode and system support more no. of users, less bit error rate and large data rate transmission.

Keywords

Avalanche Photodiode, Bit Error Rate, IDMA Scheme, Optical Fiber, PIN Photodiode.

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S. K. Sriwas ¹, M. Shukla ², R. Asthana ², J. P. Saini ¹

Affiliations
1 Department of Electronics and Communication, BIET, Jhansi - 284128, Uttar Pradesh, IN
2 Department of Electronics, HBTI, Kanpur - 208002, Uttar Pradesh, IN

Abstract

Objectives: Nonlinear effect and dispersion are the main factors to degrade the performance of Optical-Interleave Division Multiple Access (O-IDMA) system for long distance. The objective of this paper is to reduce these effects and improve the performance of the system. Methods/Statistical Analysis: Solitons have been utilized as the pulses of transmitting signals in place of Gaussian pulse, to reduce nonlinear effect and recent interleaving mechanisms are applied to decide the optimum in the O-IDMA system. MATLAB is used for simulation. Findings: The simulation results demonstrate that Solitons are the optimum solution for nonlinear effect and Group Velocity Dispersion (GVD) while the prime interleaving mechanism is optimized for user separation in the O-IDMA system. Applications/Improvements: The performance of the O-IDMA system is improved significantly and system support more no. of users and high data rate transmission.

Keywords

GVD, Gaussian pulse, Interleavers, O-IDMA Scheme, Solitons.

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Sudeept Singh Yadav ¹, Yashpal Singh ¹, S. K. Sriwas ²

Affiliations
1 Department of Computer Science and Engineering, BIET, Jhansi – 284128, Uttar Pradesh, IN
2 Department of Electronics and Communication, BIET, Jhansi – 284128, Uttar Pradesh, IN

Abstract

Objectives: To enhance the performance of decomposition encryption methods, a modified image encryption technique is utilized in (n, k, p) Gray coding exhibit the application of (n, k, p) Gray coding in the encryption of images. Methods/ Statistical Analysis: We proposed a revised algorithm based on image encryption that improves the level of security for available (n, k, p) based bit plane decomposition encryption technique. The proposed hybrid methods starts with bit-plane decomposition of (n, k, p) Gray coding then shuffling each bit plane using random scrambling finally pixel substitution based on X-OR Operation. Findings: The experimental results and comparison demonstrates that proposed encryption algorithm have best performance in image encryption. Applications/Improvements: This algorithm could be utilized for securing protection in biological traits, imaging systems in medical field and digital video surveillance system. Our next plan will additionally enhance and examine the execution of (n, k, p)-Gray coding for data hiding and picture de-noising.

Keywords

Bit-Plane Decomposition, Image Encryption, (n, k, p)-Gray Code, Pixel Permutation, X-OR.

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Ajay Kumar Maurya ¹, S. K. Sriwas ², Rajendra Kr. Srivas ³, R. K. Singh ¹

Affiliations
1 Department of Electronics Engineering, Kamla Nehru Institute of Engineering and Technology, Sultanpur – 228118, Uttar Pradesh, IN
2 Department of Electronics and Communication Engineering, Bundelkhand Institute of Engineering and Technology, Jhansi – 284001, Uttar Pradesh, IN
3 Department of Electronics and Communication Engineering, HBTU, Kanpur – 208002, Uttar Pradesh, IN

Abstract

Background/Objective: The performance of optical IDMA is evaluated qualitatively on various issues like processing gain, data length, coding technique along with distinct types of inter-leaver. Since we know that optical IDMA possess the optical channel having higher bandwidth with less interference, less distortion and minimum attenuation. Methods/Statistical Analysis: In this article, low rate convolutional codes are taken for evaluation purpose. The intention of convolutional encoder is changed various permutation are considered. As we increase the shift registers of convolutional encoder which changes the number of delay elements, after the network topology, increases the error correction capability of code on the cost of some propagation delay and circuit complexity. The constraints length which depend on number of shift registers are changed and performance of O-IDMA is estimated on MATLAB. We have used distinct types of inter-leavers on analysis like random, tree and prime inter-leavers. Performance comparison of various inter-leavers are evaluated and optimum number of users for specific inter-leavers are checked. On the spreading section, the spreading length which resembles to processing gain is also varied and performance of encoder at dissimilar constraint length with variable inter-leavers are observed. Findings:During the simulation, the arrangement of role of spreader and coder are simultaneously observed and results clearly indicates the supremacy of O-IDMA among various other techniques used in recent communication technologies. Applications/Improements: The performance of the O-IDMA system is improved significantly and system support more number of users and high data rate transmission.

Keywords

Bit Error Rate, Convolutional Code, Constraint Length, Optical Inter-Leave Division Multiple Access (O-IDMA), Processing Gain, Random, Tree and Prime Inter-Leaver

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