Research

Project Title : IoT Based Hydroponics Farming

Sanctioned Year : 2023

Amount : 5000

Funding/Sanction agency : KSCST

Status : Completed

Principal Investigators : Mr. ABHINAV NISHIKANT DHAMNE, Mr. ANIL HARIHARAN S, Mr. RAUNAK BASU, Guide:Dr Rajeshwari Hegde

Project Title : FDP on “Smart City Solutions for Sustianable Future”

Sanctioned Year : 2021

Amount : Rs 93, 000/-

Funding/Sanction agency : ATAL, AICTE

Status : Completed

Principal Investigators : Dr Rajeshwari Hegde

Project Title : Karnataka State Council for Science & Technology (KSCST) under the Student Project Programme-44th series for the project ‘“Detection of Brain Tumor using Artificial Intelligence Techniqu

Sanctioned Year : 2021

Amount : Rs.4,000

Funding/Sanction agency : Karnataka State Council for Science & Technology (KSCST)

Status : Completed

Principal Investigators : Dr. C Gururaj

Project Title : Competitive research grant: analysis of brain signals

Sanctioned Year : 2019

Amount : Rs. 2 lakhs

Funding/Sanction agency : VTU, TEQIP

Status : Completed

Principal Investigators : Rajeshwari Hegde

Project Title : Modernization of Digital Communication Lab

Sanctioned Year : 2013

Amount : Modernization of Dig

Funding/Sanction agency : AICTE-MODROBS

Status : Completed

Principal Investigators : B Kanmani

Project Title : ‘Study, Design, Implementation and Performance Analysis of Wireless Communication Concepts’(not commenced)

Sanctioned Year : 2013

Amount : Rs 1 Crore

Funding/Sanction agency : AICTE-Research Park

Status :

Principal Investigators : B Kanmani In collaboration with National Instruments

File Name : Not started

Project Title : In collaboration with National Instruments

Sanctioned Year : 2010

Amount : Rs 9 lakhs

Funding/Sanction agency : AICTE-IIPC

Status : Completed

Principal Investigators : B Kanmani

Project Title : Modernization of Signal Processing and embedded lab

Sanctioned Year : 2009

Amount : Rs 14.3 lakhs

Funding/Sanction agency : AICTE-MODROBS

Status : Completed

Principal Investigators : B Kanmani & Rajeshwari H

Project Title : Modernization of Analog & Digital Electronics Lab

Sanctioned Year : 2008

Amount : Rs 6 lakhs

Funding/Sanction agency : AICTE-MODROBS

Status : Completed

Principal Investigators : B Kanmani

Project Title : Study & implementation of Telecommunication Engineering Circuits & Systems

Sanctioned Year : 2008

Amount : Rs 6.5 lakhs

Funding/Sanction agency : BMS College: In-House Research & Development

Status : Completed

Principal Investigators : B Kanmani

Project Title : Modernization of Signal Analysis & Synthesis

Sanctioned Year : 2002

Amount : Rs 11.5 lakhs

Funding/Sanction agency : AICTE-MODROBS

Status : Completed

Principal Investigators : B Kanmani

Student Name : Ramachandra Ballary

Title of the Paper : An analysis of energy-efficient clustering algorithms for Wireless Sensor Networks (WSNs)

Faculty Coordinator :

Year : 2024

Student Name : Ramachandra Ballary

Title of the Paper : Hybrid Election-Based Ladybug Beetle Optimization for Power Consumption Minimization in Energy Efficient Resource Allocation for Software-Defined WSN

Faculty Coordinator :

Year : 2024

Student Name : Feroz Morab

Title of the Paper : Swift Convergent Weighted Quadrigeminal Beamformer Using Smart Antenna System.

Faculty Coordinator :

Year : 2024

Student Name : Feroz Morab

Title of the Paper : DoA Detection Under Heavy Noise and Fading

Research Description : IEEE International Conference on Distributed Computing, VLSI, Electrical Circuits & Robotics (2022 IEEE DISCOVER ), JNNCE, Shimoga, pp. 1-6, December 2022, DOI: 10.1109/DISCOVER55800.2022.9974636

Faculty Coordinator : Dr. Rajeshwari Hegde, Dr. Veena N Hegde

Year : 2022

Student Name : Feroz Morab

Title of the Paper : Detection, Estimation and Radiation Formation using Smart Antennas Spatial Location

Research Description : Traitement du Signal, Vol. 39, No. 1, February, 2022, pp. 389-398, DOI: https://doi.org/10.18280/ts.390141 (Q2 journal)

Faculty Coordinator : Dr. Rajeshwari Hegde, Dr. Veena N Hegde

Year : 2022

Student Name : Feroz Morab

Title of the Paper : High Resolution Detection, Estimation and Location Using GTF DoA Method for Smart Antenna System

Research Description : Traitement du Signal, Vol. 39, No. 3, June, 2022, pp. 1051-1060, DOI: https://doi.org/10.18280/ts.390332 (Q2 journal)

Faculty Coordinator : Dr. Rajeshwari Hegde, Dr. Veena N Hegde

Year : 2022

Student Name : Saritha I G

Title of the Paper : Secure Adaptive Cluster based Routing Using Multi Objective-Trust based Hybrid Optimization Algorithm for CPS

Research Description : International Journal of Intelligent Engineering & Systems, October 2022, DOI: 10.22266/ijies2022.1231.54

Faculty Coordinator : Dr. Rajeshwari Hegde

Year : 2022

Student Name : Asha K S

Title of the Paper : Relative Analysis of PBERR and LPRV Routing Technique to Enhance Network Lifetime for VANET

Research Description : Webology (ISSN: 1735-188X) Volume 19, Number 2, pp 3135-3146 , February 2022

Faculty Coordinator : Dr. Rajeshwari Hegde

Year : 2022

Student Name : PUSHPAVATHI.K.P

Title of the Paper : IIR filter design using wavelets

Research Description : Digital signal processing offers a wide range of opportunity for research with the development of technology. Wavelets are the popular topic in the recent days as they are finding their applications in digital signal processing. They are developed as a breakthrough of Fourier transforms and may be used in designing the digital filters with the cut-off frequency of π/2. In this work, we explore the application of digital frequency band transformation to obtain the digital low pass filter with cut-off frequency other than π/2.

Faculty Coordinator :

Year : 2021

Student Name : Saritha I G

Title of the Paper : Priority Aware Frequency Domain Polling Protocol in Cyber Physical Systems to Ejection of Malicious Node Attack

Research Description : International Journal of Intelligent Engineering & Systems, April 2021, Vol 4, no 3, pp 580-588, DOI: 10.22266/ijies2021.0630.49

Faculty Coordinator : Dr. Rajeshwari Hegde

Year : 2021

Student Name : Saritha I G

Title of the Paper : An Eradication of Malicious node Attack using a Priority Aware Frequency Domain Polling in Cyber Physical Systems

Research Description : European Journal of Molecular & Clinical Medicine , pp 1134-1147, ISSN 2515-8260 Vol 08, Issue 02, February 2021

Faculty Coordinator : Dr. Rajeshwari Hegde

Year : 2021

Student Name : Asha K S,

Title of the Paper : Predicting Future Localization based Routing Algorithm for Vehicular Adhoc Network

Research Description : Advances in Dynamical Systems and Applications (ADSA) (Scopus indexed Journal), ISSN 0973-5321, Volume 16, Number 2, (2021) pp. 913-925, October 2021

Faculty Coordinator : Rajeshwari Hegde

Year : 2021

Student Name : PUSHPAVATHI.K.P

Title of the Paper : Design of FIR filters for LTE-Advanced technology

Research Description : Long-Term Evolution-Advanced (LTE-A) technology was rolled out to meet the increase in the demand for data. The key mechanism of LTE-A, carrier aggregation provides wide bandwidth to meet this increased data requirement. Most of the smartphones support carrier aggregation to offer wide bandwidth. The hardware requirements of these digital systems are also modified to meet the specifications like small area, less power consumption, small size, etc. Digital filters form the core component in these digital systems. The paper applies the design of the Finite Impulse Response (FIR) digital filters to the devices that support carrier aggregation

Faculty Coordinator :

Year : 2021

Student Name : PUSHPAVATHI.K.P

Title of the Paper : Design of IIR filters from wavelets – a comparative study

Research Description : Digital filters being the core of digital signal processing systems are categorized into Finite Impulse Response (FIR) filter and Infinite Impulse Response (IIR) filter. Research in this domain shows that both types of digital filters are significant. Digital FIR filters can be designed directly from the required specifications, while digital IIR filters are popularly designed by applying the frequency transformation on the corresponding analog prototype filter. Literature shows the use of wavelets for digital signal processing. The Daubechies wavelets may be recognized as FIR filters with low-pass and high-pass cut-off frequency of 1/2, respectively. The paper attempts to apply digital frequency transformation to meet the desired cut-off frequency to the wavelet coefficients, and in the process, the FIR filter now becomes an IIR filter. The paper compares the response of the IIR filters designed using wavelets with a corresponding IIR filter designed using bilinear transform and the impulse invariant transform of analog Butterworth filters. It is observed that the frequency responses of the IIR filter designed using wavelets and designed using the bilinear transform are comparable. Hence, we have an alternate and simpler method of designing the IIR filters to meet the given specifications.

Faculty Coordinator :

Year : 2021

Student Name : PUSHPAVATHI.K.P

Title of the Paper : Exploring the applications of Frozen Newton method in the design of Digital filters

Research Description : Digital filters are popularly used in digital signal processing. The design of these filters can be done using different methods of which the rectangular window method and Frequency sampling methods are commonly used. Filter design using wavelet coefficients also shows better response. In this paper, we explore the use of the Frozen Newton method in improving the response of the filter designed using these methods. This iterative computing is applied considering the Taylor series expansion of the function up to the first order term called the Jacobian.

Faculty Coordinator :

Year : 2021

Student Name : PUSHPAVATHI.K.P

Title of the Paper : Studies on Carrier Aggregation in LTE-Advanced

Research Description : New technologies are developing each day to satisfy the needs of the human kind. LTE-Advanced is an improved technology over the Long Term Evolution (LTE) in satisfying the requirement of data rate. Carrier Aggregation is the main mechanism adopted in LTE-Advanced. It supports higher data rate through bandwidth extension. This paper summarizes the study on carrier aggregation and the technology being deployed.

Faculty Coordinator :

Year : 2020

Student Name : PUSHPAVATHI.K.P

Title of the Paper : Narrow Band Digital Filter for Carrier Aggregation

Research Description : Digital signal processing takes its place in the field of research as digital systems are taking over the world. The digital filters form the important part of any digital system. Digital filter realizations are improving each day. Commonly designed digital filters use higher order of filter to achieve narrow transition band. One of the applications of narrow transition band filters may be for the user equipment (UE) that uses LTE-Advanced (long Term Evolution) technology. Carrier Aggregation is one among the significant mechanisms of LTE-Advanced. It provides for the wide bandwidth so that the capacity can be increased. Narrow band filters may be used for extracting the desired signal from this wide bandwidth. This paper explores the narrow band FIR filters with the introduction of the small transition band.

Faculty Coordinator :

Year : 2020

Student Name : Saritha I G

Title of the Paper : Research Challenges and QoS Provisioning MAC Protocol for Cyber Physical Systems

Research Description : International Journal of Innovative Technology and Exploring Engineering, (IJITEE) ISSN: 2278-3075, Volume-9 Issue-25, December 2019

Faculty Coordinator : Dr. Rajeshwari Hegde

Year : 2019

Student Name : PUSHPAVATHI.K.P

Title of the Paper : FIR Filter design using Wavelet Coefficients

Research Description : The recent developments in the field of digital signal processing makes use of the wavelet mathematical function. The multi-resolution ability of the wavelets makes it outperform Fourier transformations in terms of data compression and quality. This paper shows that wavelet coefficients can be considered as digital Finite Impulse Response (FIR) filter coefficients in the FIR filter design.
Other most popular FIR filter design methods are the windowing method, Frequency sampling method and optimal filter design method. The paper also presents the comparison of the popularly used rectangular window method filter design with that of the wavelets.

Faculty Coordinator :

Year : 2019

Student Name : Asha K S

Title of the Paper : Parameter Based Efficient & Reliable Routing Technique to Enhance Network Lifetime for Vehicular Ad Hoc Networks

Research Description : International Journal of Engineering & Technology, 7 (3.12) (2018) 57-61, July 2018, DOI: 10.14419/ijet.v7i3.12.15863

Faculty Coordinator : Dr. Rajeshwari Hegde

Year : 2018

Student Name : PUSHPAVATHI.K.P

Title of the Paper : Frequency Sampling Method of FIR Filter design – Comparative Study

Research Description : In this paper, attempt is made to study the frequency sampling method of FIR (Finite Impulse Response) filter design in comparison with rectangular window method. The design methods are studied for the cases of the low pass filter, high pass filter and for an arbitrary response filter. The paper demonstrates that the method proposed here is the simplest way of designing any arbitrary response filter.

Faculty Coordinator :

Year : 2018

Student Name : Ramachandra Ballary

Title of the Paper : Reconfigured SDR for Wireless Communication with Reduced Power Consumption and High Throughput

Research Description : International Journal of Advanced Science and Technology Vol. 29, No. 08, (2020), pp. 1921- 1925, ISSN- 2005 - 4238 . http://sersc.org/journals/index.php/IJAST/article/view/23262

Faculty Coordinator : Dr. Rajeshwari Hegde

Year : 2018

Student Name : M N Suma (1BM08PEN02)

Title of the Paper : The OFDM system based on Discrete Cosine Harmonic Wavelet transform

Research Description : his paper proposes a new OFDM systems based on A Discrete Cosine Harmonic Wavelet (DCHWT), for BPSK and QPSK signals. This has been realized by proposing new separate structures for BPSK and QPSK signals. This enables to utilize the energy compaction of DCT and the computational simplicity of DCHWT for OFDM systems. The proposed OFDM systems provide improved performance in terms of BER and PAPR compared to those of conventional OFDM based on DFT /DCT with Cyclic prefix. The new OFDMs have a better or equal performance compared to those of some of the existing wavelet based OFDMS.

Faculty Coordinator : Dr. B Kanmani

Student Name : M N Suma (1BM08PEN02)

Title of the Paper : A New OFDM System Based on Discrete Cosine Harmonic Wavelet Transform (DCHWT) for PSK and QAM,

Research Description : This paper proposes a new orthogonal frequency division multiplexing (OFDM) system, based on discrete cosine harmonic wavelet (DCHWT) for PSK and 16-QAM modulated signals. This system uses energy compaction property of discrete cosine transform (DCT) that provides low leakage in subcarriers. DCHWT based OFDM system provides improved performance in terms of bit error rate (BER) and reduction in the peak to average power ratio (PAPR) compared to conventional cyclic prefix (CP) based Fourier transform OFDM (DFT-OFDM). Application of μμ -law companding to proposed system further improves the PAPR performance. The complementary cumulative distribution (CCDF) plots corroborate the same. BER performance is on par or better than that of Haar wavelet based OFDM in addition to improvement in PAPR. PAPR improved is in the range of 0.8–2.3 dB compared to Haar and DFT OFDM respectively, with remarkable improvement in BER. Proposed method is simple, does not require explicit decimation, interpolation, associated filtering and delay compensation for reconstruction, compared to other time domain wavelet transforms.

Faculty Coordinator : Dr. B Kanmani

Student Name : M N Suma (1BM08PEN02)

Title of the Paper : PAPR REDUCTION WITH ERROR CONTROL CODING IN OFDM

Research Description : Multicarrier schemes are supported to high data rate. Orthogonal Frequency Division Multiplexing (OFDM)
and Filtered Multi-Tone (FMT) are two techniques of multicarrier schemes. OFDM is an attractive air-interface
for next-generation wireless network without complex equalizer. OFDM is designed such a way that it sends
data over hundreds of parallel carrier which increases data rate. OFDM scheme is suffer by inter-symbol
interference (ISI) problem and peak-to-average power ratio (PAPR). An OFDM signal consists of a number of
independently modulated carriers, which can give a large peak-to-average power ratio when added up
coherently. When N signals are added with the same phase, they produce a peak power that is N times the
average power. For this example, the peak power is 16 times the average value. The peak power is defined as
the power of a sine wave with amplitude equal to the maximum envelope value. Hence, an unmodulated carrier
has a PAP ratio of 0 dB. An alternative measure of the envelope variation of a signal is the Crest factor, which
is defined as the maximum signal value divided by the RMS signal value. For an unmodulated carrier, the Crest
factor is 3 dB. This 3-dB difference between the PAPR and Crest factor also holds for other signals, provided
that the center frequency is large in comparison with the signal bandwidth. A large PAP ratio brings
disadvantages like an increased complexity of the analog-to-digital (A/D) and digital-to-analog (D/A)
converters and a reduced efficiency of the RF power amplifier.
To reduce the PAPR, many techniques have been proposed, such as clipping, coding, partial transmit sequence
(PTS), selected mapping (SLM), interleaving, hadamard transforms and other techniques etc. Among those
PAPR reduction methods, the simplest method is to use the clipping method. However, using clipping
processing causes both in-band distortion and out-of-band distortion but this can be reduce by using filtering
after clipping. This paper focus is on the clipping and filtering technique to reduce PAPR of OFDM system.
Using simulation results the analyzing effect of clipping and filtering technique to reduce the PAPR.

Faculty Coordinator : Dr. B Kanmani

Student Name : M N Suma (1BM08PEN02)

Title of the Paper : Spectral estimation and Spectral sensing for cognitive Radios”, National Conference on Women in Science and Engineering

Research Description : Spectrum estimation and spectrum sensing are primarychore of cognitive radio (CR), where in dynamically it explores the radio spectrum and reliably determine portion of the frequency bands that has been used and unused by the primary users. In this paper we propose spectrum estimation using Discrete Fourier transform (DFT) which has Non parametric estimators like Periodogram, Welch and Multitaper methods. Next Discrete cosine transform (DCT) whose performance is compared with respect to fast Fourier transform (FFT) using variance as the parameter. Further spectral sensing using wavelet packet transform for various decomposition level and different types of wavelets is being compared based on its performance parameter Receiver operating characteristics (ROC).In addition this paper also discuss about spectrum sensing using orthogonal frequency division multiplexing (OFDM).Simulation results show DCT provides better spectral estimation than DFT and has less variance. Further for wavelets Daubechies wavelet has better performance in ROC with increase in depth andorder of 10.

Faculty Coordinator : Dr. B Kanmani

Student Name : M N Suma (1BM08PEN02)

Title of the Paper : PAPR Reduction using SLM and Companding Technique”

Research Description : Orthogonal frequency division multiplexing (OFDM) is an modulation and multiplexing technique preferred in present wireless environment. One of the issues to be addressed in OFDM is high peak to average power ratio (PAPR) of the received signal which may cause power amplifiers at receivers to go into saturation. In this paper a selective mapping technique (SLM) associated with Reed Solomon (RS) code and µ law Companding is proposed to reduce PAPR in OFDM system. The simulation results shown with CCDF graphs indicate improved performance in PAPR with RS coding and companding as compared to conventional method. Further the advantage gained with using Reed Solomon (RS) coding is good error correcting capability in multipath environment.

Faculty Coordinator : Dr. B Kanmani

Student Name : M N Suma(1BM08PEN02)

Title of the Paper : Coded Wavelet Packet OFDM with Companding for PAPR Reduction

Research Description : An this paper, coded wavelet packet OFDM with companding is proposed. For the proposed OFDM, at the transmitter PAPR is calculated for different coded tree structures developed and tree with minimum PAPR is selected for transmission. The proposed wavelet packet is advantageous in terms of performance as compared to without coding and companding. Simulation performed for Haar and DB WPT structures with BPSK modulation shows that BER performance is also preserved in addition to minimum PAPR.

Faculty Coordinator : Dr. B Kanmani

Student Name : M N Suma (1BM08PEN02

Title of the Paper : Channel Equalization with efficient variable stepsize Transform domain adaptive algorithm

Research Description : Equalization techniques compensate for the time dispersion introduced by communication
channels and combat the resulting inter-symbol interference (ISI) effect. The purpose of an
adaptive equalizer is to operate on the channel output such that the cascade connection of the
channel and the equalizer provides an approximation to an ideal transmission medium. This
paper compares existing adaptive algorithm for channel equalisation for both DFT and DCT
based OFDM system. Simulations results show that performance of Transform Domain
Variable stepsize Griffith LMS(TVGLMS) algorithm in channel equalization performs with
better convergence speed and better error misadjustment than the LMS algorithm. Further
simulation results shows that DCT based OFDM system outperforms DFT –OFDM in terms
of BER and PAPR .

Faculty Coordinator : Dr. B Kanmani

Student Name : M N Suma (1BM08PEN02)

Title of the Paper : Developments in orthogonal frequency division multiplexing (OFDM) system-a survey

Research Description : In today's communication scenario, high data rate single-carrier transmission may not be feasible due to too much complexity of the equalizer in the receiver. To overcome the frequency selectivity of the wideband channel experienced by single-carrier transmission, multiple carriers can be used for high rate data transmission. Orthogonal frequency division multiplexing (OFDM), is multicarrier system which has become a modulation in physical layer of next generation WiMAX, LTE system. In this paper effort is made to present challenges in OFDM and work done so far in channel equalisation and different transforms used in OFDM system.

Faculty Coordinator : Dr. B Kanmani

Student Name : M Vasanthalakshmi

Title of the Paper : PAPR REDUCTION IN OFFSET QPSK OFDM THROUGH LOSSY SOURCE CODING

Research Description : Abstract: Orthogonal Frequency Division Multiplexing along with the multiple accesses is the modulation technique used in the fourth generation wireless communication. With the fast growing technology and the huge demand for the increase in the bandwidth has made OFDM as the best modulation technique for high speed transmission. The spectrum of the bandwidth is effectively utilized in an OFDM. This provides higher efficiency and improves the overall performance of the system. Though OFDM has all these advantages there are certain drawbacks which need to be addressed. The major ones include Inter carrier Interference and the ratio of the peak to the average power. The research idea was to consider the drawback and try to overcome it. Hence ratio of the peak to the average power was considered. The methodology is to generate the OFDM symbols with Offset QPSK as the modulation technique and analyse the peak power and peak to average power ratio of the generated symbols and apply the proposed method to reduce it. The lossy coding method falls under the category of the signal distortion. The simulation is performed in MATLAB. The simulation results of the proposed method and the amount of the reduction achieved in ratio of the peak to average power along with the amount of the bit error rate have been discussed in the paper.

Faculty Coordinator : Dr. B Kanmani

Student Name : M N Suma (1BM08PEN02)

Title of the Paper : Orthogonal frequency division multiplexing peak-to average power ratio reduction by best tree selection using coded discrete cosine harmonic wavelet packet transform

Research Description : A new orthogonal frequency division multiplexing (OFDM) with reduced peak-to-average power ratio (PAPR) based on coded discrete cosine harmonic wavelet packet transform (DCHWPT), is proposed. In this method, tree pruning is done for the selection of a tree structure with minimum PAPR. To identify different tree structures, Gray code is used which is communicated as side information to the receiver. Also to improve bit error rate (BER) performance and reduce PAPR, Hadamard codes are employed. The proposed method based on DCHWPT exploits the desirable discrete cosine transform (DCT) properties like energy compaction/low leakage, better frequency resolution and its real nature, compared with those of discrete Fourier transform. Further, the harmonic wavelet employed has built in decimation without any associated antialiasing filters and easy reconstruction by concatenation of different scales in frequency (DCT) domain with no image rejection filters and complicated delay compensation makes the proposed wavelet packet simple in implementation. The proposed OFDM discrete cosine harmonic wavelet packet (DCHWP-OFDM) which leverages the advantages of DCHWPT has been used for BPSK modulated signals. The DCHWP-OFDM provides an improvement of PAPR reduction of 2.4 and 3.4 dB as compared with those of Haar and Daubechies-4 wavelet packet OFDM, respectively. This reduction in PAPR is with a BER performance in the range of 0.001-0.0001 at an signal-to-noise ratio of 10 dB.

Faculty Coordinator : B Kanmani

Student Name : M Vasanthalakshmi

Title of the Paper : Digital circuit simulation study of Lossy source coding for PAPR reduction

Research Description : Telecommunication field is emerging rapidly with the huge demand for data communication and orthogonal frequency division multiplexing is one such modulation. The efficiency of an OFDM technique is high and multipath fading is improved to a greater extent. In spite of these benefits with an OFDM technique the instantaneous increase in the power output is the major drawback of an OFDM which results in high Peak to average power ratio. Due to this high PAPR the signal quality will degrade and reduces the efficiency. To reduce the PAPR in the OFDM symbol, a Lossy Coding method was proposed and implemented in Lab VIEW. OFDM symbols are generated for different symbol lengths and peak power is calculated for all possible combinations of the symbol lengths. The observation made was that only four combinations had high value of peak power compared with the other possible combinations. The proposed method reduces the peak power of the four combinations which in turn reduces the PAPR but with the signal distortion. This enforces Bit error rate. We also observed that as the length of the symbol increases the bit error rate will decrease

Faculty Coordinator :

Student Name : M Vasanthalakshmi

Title of the Paper : PAPR Reduction through Lossy Coding

Research Description : Orthogonal Frequency division multiplexing is the modulation technique used for the fourth generation wireless communication system. In OFDM, Signals can be modulated by multiple carriers. OFDM uses the bandwidth of the spectrum efficiently. But the limitation of the OFDM system is the high Peak to Average Power Ratio (PAPR) which results in the degradation of the signal quality. Hence reducing the PAPR is the major criteria for any systems. Several researchers has proposed and implemented the methods to reduce the Peak to average power ratio. In this paper an attempt has been made to provide an overview of the different PAPR reduction techniques in OFDM and proposes new lossy coding method which can be adopted to reduce the PAPR in the OFDM systems with the introduced BER

Faculty Coordinator : Dr. B Kanmani

File Name : DOI: 10.1109/ICAMMAET.2017.8186704

Student Name : M Vasanthalakshmi

Title of the Paper : Lossy Source Coding Method for PAPR Reduction in Bpsk Ofdm

Research Description : : OFDM has been considered as the advanced modulation technique to provide higher data rate with several advantages like high spectral efficiency and is most widely used modulation technique in the fourth generation wireless communication. Besides the advantages of the OFDM there are several disadvantages like high Peak to Average power ratio and the Inter carrier Interference. Based on the survey several papers are published in the area by several researchers. In this paper an effort has been made to reduce the Peak to average power ratio. In this work, a new Lossy coding method has been proposed to overcome the drawback of PAPR and the simulation results of the same have been discussed. The proposed method lies in the signal distortion category and hence the Bit error rate also been taken into consideration and has been discussed.

Faculty Coordinator : Dr. B Kanmani

Student Name : M Vasanthalakshmi

Title of the Paper : PAPR of QPSK OFDM modulation schemes: A comparative study

Research Description : Abstract: With the rapid growth in the field of telecommunication, there is a huge demand for the increase in the bandwidth. Orthogonal Frequency division multiplexing is an advanced modulation technique suitable for the fourth generation wireless communication due to the improved spectral efficiency and the bandwidth. Besides these benefits of the OFDM there are some major concerns in an OFDM which needs to be taken care. Inter symbol interference and the Peak to average power ratio [PAPR] is the major drawbacks affecting the performance of an OFDM symbols. In this work PAPR has been considered. The comparative study of PAPR of QPSK OFDM and the Offset QPSK OFDM has been done. Initially OFDM symbols are generated with the QPSK as the modulation techniques for the different symbol lengths ranging from 8 to 12 and the PAPR has been calculated for all combinations. The number of the combinations resulting in a high value of PAPR was 16 for all the symbol lengths. The experiment was repeated with the offset QPSK for the same symbol lengths and the numbers of the combinations resulting in a high value of PAPR were reduced to 8 for all the symbol lengths. The mean of the QPSK and the Offset QPSK were computed. There was a reduction in the mean with the offset QPSK compared with the QPSK. The simulation results and the mean of the same have been discussed in this pape

Faculty Coordinator : Dr. B Kanmani

File Name : Vasantha Lakshmi, M and Kanmani, B, PAPR of QPSK OFDM Modulation Schemes: A Comparative Study (2019)