Dr. Chhavi Sharma

@mjpru.ac.in

Assistant Professor , M.J.P.Rohilkhand University Bareilly , Uttar Pradesh ,India
M.J.P.ROHILKHAND UNIVERSITY

Dr. Chhavi Sharma


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https://researchid.co/chhavi1

RESEARCH, TEACHING, or OTHER INTERESTS

Electrical and Electronic Engineering, Communication, Artificial Intelligence, Information Systems
12

Scopus Publications

Scopus Publications

  • Comparative Analysis of Nonlinearity in Asymmetrically Clipped OFDM VLC Systems Using a Precoding Scheme for Sustainable Connectivity Across Modulation Orders
    Alisha, Chhavi Sharma, Pankaj Kumar Sharma
    Proceedings 2025 International Conference on Electrical Engineering and Information Systems Ceeis 2025, 2025
    Visible Light Communication (VLC) has emerged as a promising technology for advancing sustainable development through eco-friendly and energy-efficient connectivity solutions. By leveraging the visible light spectrum, VLC provides a green alternative to traditional radio frequency (RF) communication, supporting high-speed data transmission while utilizing existing LED lighting infrastructure. However, challenges such as the inherent nonlinearity of LEDs and the asymmetric clipping process introduce signal distortion, which can hinder system performance. This study examines the impact of nonlinearity in Zadoff-Chu Precoded Asymmetrically Clipped Orthogonal Frequency Division Multiplexing (ACO-OFDM) on the performance of Visible Light Communication (VLC) systems across various modulation orders. It evaluates the resulting Bit Error Rate (BER) and data throughput to identify an optimal combination of modulation order and precoding scheme that balances robustness against nonlinearity with high data transmission rates. The findings reveal that Peak-to-Average Power Ratio (PAPR) is significantly reduced by using Zadoff-Chu precoding and achieving PAPR reductions of approximately 1.89 dB for BPSK and 0.92 dB for 16-QAM. This precoding technique also leads to notable improvements in BER and spectral efficiency, especially for higher modulation orders, while the moderate increase in PAPR is outweighed by the overall performance gains. These results underscore the potential of Zadoff-Chu precoding to mitigate nonlinearity effects and enhance the efficiency of VLC systems.
  • MIMO Based VLC Link for Smart City Applications
    Chhavi Sharma, Shivam, Sumit Singh, Reshav Kumar, Pankaj Sharma
    Lecture Notes in Electrical Engineering, 2024
  • Improved Riemann Sequence Based Selective Mapping
    Chhavi Sharma, Pankaj Sharma
    2023 International Conference on Computer Communication and Informatics Iccci 2023, 2023
    Orthogonal frequency division multiplexing (OFDM) is recently introduced as a waveform candidate for6TH generation New Radio (5GNR) system and it is also popular for 5th generation wireless communication systems due to various advantages. Large peak to average power ratio is a major drawback of OFDM signal. It is necessary to reduce PAPR of OFDM system for power efficient operation of high power amplifier. This paper presents an improved Riemann sequence based SLM (IRSLM) for PAPR reduction of OFDM system. From the results, it is revealed that the PAPR of proposed scheme is improved by 1.9dB, 0.9dB and 0.4dB compared with CSLM, WSLM and Riemann based SLM (RSLM), respectively.
  • Performance Analysis of an Indoor Visible Light Communication System Using Optisystem Software
    Shivam, Chhavi Sharma, Sumit Singh, Reshav Kumar
    2023 3rd International Conference on Advances in Electrical Computing Communication and Sustainable Technologies Icaect 2023, 2023
    LED's are used for both lighting and data exchange in the rapidly expanding field of visible light communication. In this study, we have investigated the performance of indoor visible light communication with white LED using the modeling tool Opti system. Quality factor and log of BER measurements are used to assess the effectiveness of the Visible Light Communication system at various data rates and link lengths. This system, with a Q factor of 6.508, can deliver a 1 GB/s transmission rate across a connection distance of up to 3 m. The investigation is conducted for the NRZ-OOK modulation formats using a white LED as the communication source. When external ambient light influences are present, the performance of the VLC system is also examined, and its overall performance is improved by utilizing a rectangular optical filter.
  • Internet of Things Based Smart Home Security Analysis System
    P. Srujana, Kalluri Rama Krishna, S. Madhavi, Chhavi Sharma, Nimmati Satheesh, Gaddi Poshamallu
    Proceedings of the International Conference on Artificial Intelligence and Knowledge Discovery in Concurrent Engineering Iceconf 2023, 2023
    The smart home is a setting where different electronic gadgets and machines are organized to give smart services to the homeowner on a far reaching premise. People. The elements gave by the applications to smart homes are being acknowledged and embraced by associations and individuals from one side of the planet to the other. this could be because of the different advantages that the arising internet of Things (IoT) advancements and gadgets, outfitted with sensors, cameras, or actuators, and ready to either accumulate data from the climate or perform legitimate errands, give as far as making clients' regular routines and occupations more straightforward. Ongoing checking, controller, security from interlopers, gas/alarm, and different capabilities are among the critical attributes of smart houses. Since delicate and individual information is overseen in smart homes, security and protection measures ought to be executed to shield clients' and organizations' information from encroachment while as yet guaranteeing the arrangement of trustworthy services. The review's decisions and suggestions assist us with understanding how clients' mentalities toward security are changing in smart homes as IoT home gadgets become more ordinary. Albeit a smart home arrangement in light of the Internet of Things can offer a superior and more compelling way to deal with healthcare the executives, end client reception is very low. The presentation of smart home healthcare services, which basically focus on the old, will be essentially hampered by these moderate clients. The discernment layer, transport layer, and application layer security defects might be available in most of recently evolved smart gadgets because of their designs, which are by and large very basic. Most of IoT security examination structures right now being used require extra elite execution equipment. Simultaneously, there hasn't been any attention on the new “mining” malware or other assault strategies that conspicuously take the gadget's figuring power. This paper plans and carries out a smart home security investigation framework as an answer for the previously mentioned issues.
  • Implementation of Reliability Antecedent Forwarding Technique Using Straddling Path Recovery in Manet
    S. Rahamat Basha, Chhavi Sharma, Farrukh Sayeed, A. N. Arularasan, P. V. Pramila, Santaji Krishna Shinde, Bhasker Pant, A. Rajaram, Alazar Yeshitla
    Wireless Communications and Mobile Computing, 2022
    In a mobile ad hoc network, packets are lost by interference occurrence in the communication path because there is no backup information for the previous routing process. The communication failure is not efficiently identified. Node protection rate is reduced by the interference that occurs during communication time. So, the proposed reliability antecedent packet forwarding (RAF) technique is applied to approve the reliable routing from the source node to the destination node. The flooding nodes are avoided by this method; the previous routing information is backed up; this backup information is retrieved if any interference occurred in the communication period. To monitor the packet flow rate of every node, the straddling path recovery algorithm is designed to provide an interference free-routing path. This path has more number of nodes to proceed with communication. These nodes have a higher resource level and also used to back up the forwarded data; since sometimes routing breakdowns occurred, data are lost, which is overcome by using a backup process. It improves the network lifetime and reduces the packet loss rate.
  • Hysteresis Band Control of Grid Interactive (PV-SOFC) Hybrid Generating System
    Seema Agrawal, Chhavi Sharma, D.K. Birla
    2020 IEEE International Conference for Innovation in Technology Inocon 2020, 2020
    This paper addresses modeling and software simulation of parallel interconnection photovoltaic (PV) and solid oxide Fuel Cell (SOFC) to obtain continuous supply and hysteresis current controlled single phase inverter for hybrid generation system. Two arm Insulated Gate Bipolar Junction Transistor (IGBT) is applied to convert DC power produced by (PV-SOFC) into Alternating Current (AC) Supply. The proposed hysteresis controller is capable of reducing the total harmonic distortion, current regulation, and provides constant switching frequency. The DC-DC Boost Converter is implemented to track Maximum Power Point using Incremental Conductance (INC) Algorithm for efficient utilization of PV system. The synchronization between the inverter and the Grid is maintained by using Phase Locked Loop (PLL) within Hysteresis Band Controller. The performance of phase locked loop (PLL) based proposed hysteresis current controller of inverter is evaluated through MATLAB-Simulation. Simulation results are verified the effectiveness of suggested system.
  • A power-efficient gfdm system
    Chhavi Sharma, Arvind Kumar, S. K. Tomar
    Lecture Notes in Electrical Engineering, 2020
  • A Comparison of GFDM and OFDM at Same and Different Spectral Efficiency Condition
    Chhavi Sharma, S. K. Tomar, Arvind Kumar
    Lecture Notes on Data Engineering and Communications Technologies, 2020
  • Nonlinearity mitigation in Im/Dd Optical OFDM using new SLM scheme
    Arpn Journal of Engineering and Applied Sciences, 2018
  • PAPR reduction in OFDM system using adapting coding technique with pre distortion method
    Wseas Transactions on Communications, 2011
  • Improvement in power updating algorithm in wireless DS-CDMA networks
    M. Rai, C. Sharma
    2009 International Conference on Emerging Trends in Electronic and Photonic Devices and Systems Electro 09, 2009