Arashid Ahmad Bhat | Baba Ghulam Shah Badshah University (original) (raw)

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Papers by Arashid Ahmad Bhat

International Journal of Advance Engineering and Research Development

This paper presents operation and performance comparison analysis between square wave inverters a... more This paper presents operation and performance comparison analysis between square wave inverters and pure sine wave inverters. The paper also gives a review of various inverter topologies adapted for square wave conversion and subsequent filtering of the same.

IJAERD, 2018

DC-AC inverters are electronic devices used to produce mains voltage AC power from low voltage DC... more DC-AC inverters are electronic devices used to produce mains voltage AC power from low voltage DC energy (from a battery or solar panel). This makes them very suitable for when you need to use AC power tools or appliances but the usual AC mains power is not available. Examples include operating appliances in caravans and mobile homes, and also running audio, video and computing equipment in remote areas. Most inverters do their job by performing two main functions: first they convert the incoming DC into AC, and then they step up the resulting AC to mains voltage level using a transformer. And the goal of the designer is to have the inverter perform these functions as efficiently as possible. So that as much as possible of the energy drawn from the battery or solar panel is converted into mains voltage AC, and as little as possible is wasted as heat. One of the key factors pertaining to AC inverters is output regulation. We take for granted the fact that our mains power is very well regulated. So you can plug almost any appliance into a standard point outlet, and it will operate correctly. That's because the electricity supplier has enormous generating plants, with automatic regulation systems to keep the mains voltage and frequency very close to constant, despite load variations of many megawatts. Inevitably you can't get this kind of performance from a much smaller electronic inverter, connected to a modest battery or solar panel as the energy source. However most modern inverters can provide reasonably good regulation for loads of up to their rated capacity (given in watts) assuming of course that they are running from a well-charged battery. In this paper a brief review of most widely used methods for voltage regulation in AC inverters is explain and a mutual comparison is also drawn.

IJECT, 2014

The main aim of this paper is to first design an OFDM trans-Receiver system using Direct Detectio... more The main aim of this paper is to first design an OFDM trans-Receiver system using Direct Detection Mechanism, Validate the simulated design, extract the various performance evaluating parameters & then evaluate the dependencies of these performance evaluating parameters onto various system parameters like Fiber length, Operating Frequencies, Channel spacing, & Source type. After that we redesigned the system using Coherent Detection Mechanism and again validated the design and evaluated the aforesaid dependencies. Then a mutual comparison of the two systems was carried out. The performance of the two systems was improved by separately Designing Three Dispersion & Distortion Compensation Techniques viz Pre DCF, Post DCF and Symmetrical DCF. Then a mutual comparison between Performances of the system without using any Compensation Techniques and with proper Compensation techniques was carried out. Thus after evaluating all the dependencies optimal set of system parameters was proposed at which the system yields its peak performance with minimum losses and better OSNR values.

IJAERD, 2018

In this digital era the communication demand has increased from previous eras due to introduction... more In this digital era the communication demand has increased from previous eras due to introduction of new communication techniques. As we can see there is increase in clients day by day, so we need huge bandwidth and high speed networks to deliver good quality of service to clients. Fibre optics communication is one of the major communication systems in modern era, which meets up the above challenges. This utilizes different types of multiplexing techniques to maintain good quality of service without traffic, less complicated instruments with good utilization of available resources .Wavelength Division Multiplexing (WDM) is one of them with good efficiency. It is based on dynamic light-path allocation. Here we have to take into consideration the physical topology of the WDM network and the traffic. We have designed here an 8-channel WDM system and carried out detailed analysis to evaluate the dependencies of the performance evaluating parameters onto the various system parameters. This paper focuses on design of an multi channel WDM trans-receiver System and then optimizing its performance parameters. Simultaneously evaluation of dependencies of various performance evaluating parameters onto various system parameters was obtained. Moreover effect of optical amplification was obtained onto system performance.

RI PUBLICATIONS, 2011

The invention of EDFA in late 1980s was one of the major events in the history of optical communi... more The invention of EDFA in late 1980s was one of the major events in the history of optical communication. It provided new life to the optical fiber transmission window centered at 1.55 µm and the consequent research into technologies that allow high bit-rate transmission over long distances. EDFA have a high gain, operating at low pump power and their performances are better in comparison with other similar amplifiers and optical devices. Also, the EDFA have a large bandwidth, a low noise figure and polarization insensitivity. However, in case of EDFA based WDM systems a serious problem of un-flattened gain spectrum is observed. This problem can be rectified using several methods. The methods like filter optimization, controlling the doped fiber length and pump power and an all-optical feedback loop in inline erbium-doped fiber amplifiers (EDFA's) are analyzed. Here the implementations for EDFA based WDM Transmission system using various topologies have been proposed and then multiple simulations were carried out to obtain proper Gain Flattening in the Transmission System. In addition to this a detailed analysis has been carried out to compare the Gain Flattening capabilities of various implemented topologies. The results obtained were in well accordance with the practical results.

IJAERD, 2018

− while optical networking had its origin in the research community a quarter of a centuary ago,t... more − while optical networking had its origin in the research community a quarter of a centuary ago,the realisation of the vision has not had a straight trajectory.The main focus of this paper was first to design a general bidirectional Trans-receiver system using fiber. After validating the design, the dependence of various performance evaluating parameters onto various system parameters was evaluated .The dependencies/effect of various noise sources was also evaluated for validated design. After that, some techniques were proposed that if incorporated in our predesigned setup would improve the performance evaluating parameters and also their dependencies on the various system parameters.

IJARCSSE, 2013

This paper focuses on design of an 8-channel WDM System and then optimizing its performance param... more This paper focuses on design of an 8-channel WDM System and then optimizing its performance parameters. This paper also focuses on evaluation of dependencies of various performance evaluating parameters onto various system parameters. Thus evaluating optimum fiber length, Channel frequencies and frequency spacing.This paper also draws an effective comparison between Non-EDFA WDM system and an EDFA based WDM system. The system was simulated and analyzed with OPTISYSTEM9 Simulation Tool.

RI Publications , 2011

The predicted growth in mobile phone traffic and move towards enhanced mobility will lead to a ne... more The predicted growth in mobile phone traffic and move towards enhanced mobility will lead to a need for wireless infrastructure that provides increased bandwidth per user future wireless networks will require an optical network to provide antenna base station with sufficient bandwidth to provide individual users with more bandwidthRadio over Fiber technology (RoF), an integration of wireless and fiber optic networks, is an essential technology for the provision of unaltered access to broadband wireless communications in a range of applications including last mile solutions, extension of existing radio coverage and capacity, and backhaul. In this paper, we proposed subcarrier multiplexed (SCM) technique for data transmission for the RoF. The design and performance analysis of the system in term of signal power, Bit Error Rate (BER), carrier to noise ratio (CNR) and eye diagram will be presented.

IJAERD, 2018

In today's world, the communication has become an integrally of every human. FSO is a line of sig... more In today's world, the communication has become an integrally of every human. FSO is a line of sight wireless communication system in which the data is transmitted in the form of laser beams. FSO is one of the best communication system because of its highest bandwidth, no need of licensing, maximum transmission data rates with very high security. Since the signal is transmitted via free space, the laser beams are degraded due to turbulent atmosphere.The main aim of this module is to first design a single channel FSO trans-receiver system and then upgrade it to higher number of channels (upto 30 channels). After the design is done and validated multiple simulations are carried out to evaluate the effects/phenomena that limit the performance of the proposed designs and extend their effects on performance evaluating parameters. Then different techniques are proposed that improve the performance evaluating parameters and either eliminate or minimize the effect of noise and distortion effects onto system performance.

This paper focuses on design of an 8-channel WDM System and then optimizing its performance param... more This paper focuses on design of an 8-channel WDM System and then optimizing its performance
parameters. This paper also focuses on evaluation of dependencies of various performance evaluating parameters
onto various system parameters. Thus evaluating optimum fiber length, Channel frequencies and frequency
spacing.This paper also draws an effective comparison between Non-EDFA WDM system and an EDFA based WDM
system. The system was simulated and analyzed with OPTISYSTEM9 Simulation Tool.

International Journal of Advance Engineering and Research Development

IJAERD, 2018

IJECT, 2014

IJAERD, 2018

RI PUBLICATIONS, 2011

IJAERD, 2018

IJARCSSE, 2013

RI Publications , 2011

IJAERD, 2018

This paper focuses on design of an 8-channel WDM System and then optimizing its performance param... more This paper focuses on design of an 8-channel WDM System and then optimizing its performance
parameters. This paper also focuses on evaluation of dependencies of various performance evaluating parameters
onto various system parameters. Thus evaluating optimum fiber length, Channel frequencies and frequency
spacing.This paper also draws an effective comparison between Non-EDFA WDM system and an EDFA based WDM
system. The system was simulated and analyzed with OPTISYSTEM9 Simulation Tool.