Research Cell: An International Journal of Engineering Sciences

Jagjeet Singh ¹, Kulwinder Singh ², Pankaj Sharma ¹, Kamaljit Singh Bhatia ³, Hardeep Singh Ryait ⁴

Affiliations
1 AIET, Faridkot, IN
2 IKG PTU, Jalandhar, IN
3 SGGSWU, Fatehgarh Sahib, IN
4 BBSBEC, Fatehgarh Sahib, IN

Abstract

Long haul multichannel optical communication system is extremely affected by nonlinear effect like four wave mixing (FWM). The FWM effect depends on channel separation, number of channels and bit rates. This paper presents the design and performance analysis of FWM effect on bit error rate, Q-factor, eye opening, jitter etc. at variable bit rates and dispersion values.

Keywords

FWM (Four Wave Mixing), Dispersion, Bit Rates.

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Sukhvir Kaur ¹, Kulwinder Singh ¹

Affiliations
1 Department of Electronics and Communication Engineering, Punjabi University, Patiala, IN

Abstract

Wireless mobile adhoc networks are used in short distance communication where each operating terminal has their own range of operation. We present a scheme which provides privacy in an adhoc network. This RSA encryption algorithm based on asymmetric encryption algorithm which works on public key for encrypting a message or private key for decrypting a message. This proposed scheme preserves privacy of nodes and reduces attacks in adhoc networks. We show how packets are transmitting from source node to destination node through neighboring nodes. We also show the improvement in throughput of network in the presence of attackers.

Keywords

RSA, ADOV, MANET, HLA, SHA-I.

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Supreet Singh ¹, Kulwinder Singh ¹

Affiliations
1 Department of Electronics and Communication Engineering, Punjabi University, Patiala, IN

Abstract

In this paper, self phase modulation fiber nonlinearity, in single mode fiber optical communication system has been investigated with dispersion. The investigation is carried out in terms of Q - factor analysis at optical receiver output of single mode optical fiber communication system by varying the fiber length 10 to 100 Km at different values of fiber dispersion -10 to +10 ps/nm/km. It has been observed from results that at fiber length of 10 km and zero dispersion we obtain maximum Q-factor of 23.73 and it is least affected by SPM. Further we have also analyzed the effect of SPM by varying the input launched optical power from -10 to +12.5 dBm at different values of effective core area of optical fiber 30 to 80 μm² in terms of Q-factor. From analysis it has been observed that 60 μm² effective fiber core area gives minimum SPM at -10 dBm input launched optical power. Similarly SPM effect is investigated by varying input launched optical power at various values of fiber dispersion from -10 to +10 ps/nm/km and observed that zero fiber dispersion at -10 dBm input launched optical power gives maximum Q-factor. This analysis indicates that 10 km fiber length, -10 dBm optical lunched power and zero fiber dispersion are best suitable parameters for reduction of SPM nonlinearity in these systems.

Keywords

SPM, Q-Factor, EDFA, Leff and Aeff.

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Supreet Singh ¹, Kulwinder Singh ¹

Affiliations
1 Department of Electronics and Communication Engineering, Punjabi University, Patiala, IN

Abstract

In this paper the effect of Self Phase Modulation fiber nonlinearity in 40 Gb/s optical fiber communication system has been compared with different modulation formats such as non return to zero (NRZ), return to zero (RZ), carrier suppressed return to zero (CS-RZ) and modified duo binary return to zero (MDRZ). The effect of SPM fiber nonlinearity has investigated in terms of Q-factor at the receiver output by using different modulation formats with variation in input launched power from -10 to 15 dBm. It has observed that the performance of optical fiber communication system is limit by SPM effect and MDRZ format seems to be best choice for input power 15 dBm. Further, we have analysed the effect of SPM in terms of Q-factor with variation in fiber length from 60 to 360 km and observed that at 360 km fiber length MDRZ format gives better Q-Factor as comparison to other modulation formats. So we proposed that MDRZ modulation format will be used when system should operate at high input power and longer distance.

Keywords

NRZ, RZ, CS-RZ, SPM, EDFA, SSMF and DCF.

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Kulwinder Singh ¹, Supreet Kaur Gill ¹

Affiliations
1 Department of Computer Engineering, UCoE, Punjabi University, Patiala, IN

Abstract

The vehicular networks are being used in the variety of vehicular application to establish and control the communications in the vehicle to vehicle domain, vehicle to road side unit (RSU) or RSU to RSU, the vehicular networks are incorporated to share the various types of the traffic updates between the vehicles and vehicular networks to the `road side units (RSU). The major problem lies with the proper handling of the congestion of the traffic originated from the vehicular networks, which lies with the traffic congestion and the traffic stream isolation. In this paper, the major focus is established over the development of the adaptive vehicular network flow prioritization according to the urgency in the delivery of the traffic flows. Also the incorporation of the traffic inflow aggregation has been performed to combine the inflow streams for the guidance towards the target nodes or services. The proposed model combines the Unified Multi Link Aggregation (UMLA) along with traffic inflow Prioritization and Isolation Algorithm (FPIA) for the betterment of the vehicular networks. The experiments have been performed over the multifaceted simulation environments and the results have been obtained from each of the proposed model simulation. The experimental results have proved the efficiency of the proposed model in controlling the overall load and end to end delay by utilizing the traffic inflow organization and handling during the vehicular network transmissions.

Keywords

Vehicular Traffic Isolation, Traffic Prioritization, Traffic Management.

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Gagandeep Singh Walia ¹, Kulwinder Singh ¹, Manjit Singh Bhamrah ¹

Affiliations
1 ECE Department, Punjabi University, Patiala, IN

Abstract

In this paper hybrid optical amplifier is investigated by cascading configuration of distributed fiber Raman amplifier and Erbium doped fiber amplifier for 64 X 20 Gb/s dense wavelength division multiplexing operating at different channel spacing (25, 50, 100, 150 GHz). At the input power of -10 dBm and variation in the Raman fiber length (20 to 100 km) of Raman amplifier, the on-off gain of more than 34 dB up to 40 km of Raman fiber length at 100 GHz channel spacing. The noise figure is 8 to 11 dB and is minimum up to 40 km and output signal is also maintained at this Raman fiber length. When the input power is varied from -10 dBm to 4 dBm at 40 km of Raman fiber length the on-off gain is 35.7 dB and it is slightly decrease with increase of input power and noise figure is maintained less than 12 dB at 100 GHz channel spacing. From the investigations 40 km is found to be the optimum Raman fiber length, and among different channel spacing 100 GHz may be a better choice for obtaining better gain and noise figure results.

Keywords

Wavelength Division Multiplexing (WDM), Hybrid Optical Amplifier (HOA), Erbium Doped Fiber Amplifier (EDFA), RAMAN Amplifier.

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