iosr-JECE   National Conference On Discrete Mathematics & Computing (NCDMC-2017)

Abstract: Optical wireless communication has been recently proposed as a viable alternative to RF wireless communication. The optical wireless systems involve intensity modulation of the optical signal using various digital modulation schemes such as On-Off Keying (OOK), Pulse Code Modulation (PCM) and so on. Multicarrier modulation scheme known as Orthogonal Frequency Division Multiplexing (OFDM) is the growing trend in LED optical wireless systems due to its inherent robustness against Inter Symbol Interference (ISI) as the symbol period of each subcarrier can be made longer than the delay spread of the multipath distortion. Orthogonal frequency division multiplexing (OFDM) is a method of parallel transmission of data on multiple subcarriers............
Keywords - Optical Wireless Communication (OWC); Light Emitting Diode (LED); Peak to Average Power Ratio (PAPR); Orthogonal Frequency Division Multiplexing (OFDM); nonlinear companding, Visible Light Communication (VLC).

[1] C. W. Chow, Senior Member, IEEE, C. H. Yeh,Member, IEEE,Y. F. Liu,and P. Y. Huang, "Background Optical Noises Circumvention in LED Optical Wireless Systems Using OFDM," IEEE Photonics Journal Vol. 5, No. 2, April 2013
[2] Kasun Bandara, P. Niroopan, Yeon-Ho Chung,Department of Information and Communications Engineering, Pukyong National University, " PAPR Reduced OFDM Visible Light Communication using Exponential Nonlinear Companding," COMCAS 2013, Tel Aviv, Israel, 21-23 October 2013.
[3] M. Z. Afgani, H. Haas, H. Elgala, and D. Knipp,"Visible Light Communication Using OFDM," in Proc. of the 2nd International Conference on Testbeds and Research Infrastructures for the Development of Networks and Communities (TRIDENTCOM), Barcelona, Spain, Mar. 1–3, 2006, pp. 129–134. .
[4] H. Elgala, R. Mesleh and H. Haas, "Practical Considerations for Indoor Wireless Optical System Implementation using OFDM,"unpublished.
[5] Tao Jiang, Yang Yang, Member, IEEE, and Yong-Hua Song, Senior Member, IEEE, "Exponential Companding Technique for PAPR Reduction in OFDM Systems," IEEE Transactions on Broadcasting, vol-51, No.2, June 2005

Abstract: In recent years, the electrical harmonic pollution is getting more and more serious with the far ranging use of nonlinear components in electric and electronic devices. The presence of harmonics in power system is a major concern to power engineers for many years. Harmonic Pollution increases industrial plant downtimes and power losses. Harmonic of an electrical signal is the content of the signal whose frequency is an integer multiple of the fundamental system frequency. The cause of harmonic in a power system is from highly nonlinear devices. In power system, harmonic analysis is use to determine the impact of harmonic producing load on a power system.............

Keywords – Electrical harmonic pollution; Fast Fourier Transform; LPC2138 microcontroller

[1] Dody Ismoyo, Mohammad Awan, NorashikinYahya International Conference on Signal Processing Systems Harmonic Analysis of 240V AC Power Supply using TMS320C6713 DSK May 15-May 17, 2009.
[2] A. Medina, J. Segundo-Ramirez, P. Ribeiro, W. Xu, K. L. Lian, G. W. Chang international transactions on power delivery Harmonic Analysis in Frequency and Time Domain3, JULY 2013
[3] ARMv7-M Architecture Reference Manual

Abstract: A novel circuit structure of dual-band notch Fil-ters is proposed in this paper. This structure comprises two shunt-connected stepped impedance resonators with J Inverter,a transmission line in between. Theoretical analysis and design procedures are described. Insertion loss method is used to find the discrete filter design. The derived synthesis equations have two degrees of freedom which provide more design flexibility in filter synthesis. In this paper, A wide bandwidth micro-strip band-stop filter (BSF) is presented. For efficiently reduce the size of the filter. the filter operate in two ISM Bands.

Keywords: Bandstop filter(BSF), dual-band(DB) filter, filter synthesis, stepped-impedance resonator (SIR).

[1]. Dieter Ferling, Xin Yu, Rupert Rheinschmitt, and Andreas Pascht,"Band-Reject Filter and Suppression of In-Band Interfering Signals in Mobile Communication,"EuMA,2015.
[2]. Youssef Tawk, Joseph Costantine, and Christos G. Christodoulou "Perfor-mance of given suspected blood indicator,"IEEE Transactions on antennas and pro, VOL. 62, NO. 3, MARCH 2014.
[3]. Zhengzheng Wu, Yonghyun Shim, and Mina Rais-Zadeh , "Switchable Wide Tuning Range Bandstop Filters for Frequency-Agile Radios,"IEEE Microw. Mag.,vol. 10, no. 6, pp. 55-72, Oct. 2012.
[4]. Buddhadev Pradhan , Bhaskar Gupta "GuptaRF MEMS Tunable Band Reject Filter using Metamaterials,"National Programme on Micro and Smart Systems (NPMASS)-2012)
[5]. Kuo-Sheng Chin, Member,IEEE, Jun-Hong Yeh, and Shuh-Han Chao "GuptaCompact Dual-Band Bandstop Filters Using Stepped-Impedance Resonators-,"IEEE2007

Abstract: This paper presents an effective method in panoramic image creation. Here an automatic method of feature detection and feature mating using SIFT (Scale Invariant feature transform) algorithm has been used. SIFT algorithm is very robust method that can detect and describe local features in the image. Then find the overlapping area of these two images. A minimal cost path in the overlapping area of two images is found by dynamic programming method. This minimal-cost path (optimal seam) is used to stitch images. Dynamic programming is faster than other seam finding methods and uses little memory. The overlapping images are cut along the seam and merge together...............
Keywords- SIFT, RANSAC, Optimal seam, Dynamic programming, Image stitching

[1] Cheng-Ming Huang,Shu-Wei Lin,Jyun-Hong, "Efficient Image Stitching of Continuous Image Sequence With Image and Seam Selections," IEEE Sensor Journal, vol.15,2015.
[2] Wang M, "Panorama Painting: With a Bare Digital Camera," ICIG'09. Fifth International Conference, 2009.
[3] Brown M, Lowe DG, "Automatic panoramic image stitching using invariant features," Int J Comput Vis, Vol.1,59-73,2007.
[4] Kekre HB, Thepade SD, "Rotation invariant fusion of partial image parts in vista creation using missing view regeneration," WASET Int J Electr Comput Eng Syst, 47:660,2008.
[5] Helmut D, "Panorama Tools. Open source software for immersive imaging international VR photography conference," http://webuser.fhfurtwangen.de/ dersch/IVRPA.pdf, June 2007.

Abstract: In the wireless communication systems, due to the increasing demands for high data rate and high efficiency, several practical challenges arise in the design of directconversion trans-mitters. According to the existing literatures, power amplifier (PA) nonlinearity and local oscillator (LO) pulling are the most critical factors to deteriorate the transmit signal quality. In this work, the above two issues are carefully investigated so as to improve the resultant distortion of the DCT output signal. An integrated approach for PA linearization and anti-LO pulling is designed.

Keywords – Electromagnetic Compatibilty(EMC), Electro-magnetic Interference (EMI), Software defined Radio(SDR), Band Reject Filter(BRF)

[1] C.-H.Hsiao, C.-J. Li, F.-K.Wang, T.-S.Horng, and K.-C. Peng, "Study of direct-conversion transmitter pulling effects in constant envelope modulation systems,"IEEE MTT-S Int. Microw. Symp. Dig May 2010, pp. 11741177
[2] Chieh-Hsun Hsiao,Chien-Jung Li and Fu-Kang Wang Tzyy-Sheng Horng and Kang-Chun Peng , "Analysis and Improvement of Direct-Conversion Transmitter Pulling Effects in Constant Envelope Modulation Systems,"
[3] IEEE transactions on microwave theory and techniquesvol.58, no. 12, december 2010.
[4] Tzyy-Sheng Horng,Chieh-Hsun Hsiao,Chi-TsanChe,and Kang-Chun Peng, "Design of a Direct Conversion Transmitter to Resist Combined Effects of Power Amplifier Distortion and Local Oscillator Pulling,"
[5] IEEE transactions on microwave theory and techniques vol. 60, no. 6, june 2012 S.Liangpunsakul, L.Mays, and D.K.Rex "Performance of given suspected blood indicator,"The American Journal of Gasteroenterology, 98,2676(2003).

Abstract: Out of a number of biometric identification systems, the most commonly used and the oldest method of identification is the fingerprint-based identification that has been effectively used in a diversity of applications. Brightness and Contrast enhancements have a significant role in fingerprint identification systems. Generally, the low contrast images are enhanced in spatial domain followed by other image processing methods in the transform domain. In this paper we are proposing a new simple, yet powerful method in fingerprint enhancement that uses a two stage image enhancement technique in spatial and transform domain for addressing low contrast and brightness...............
Keywords: Image Enhancement, Spatial Domain, Transform Domain, Sequency based Mapped Real Transform(SMRT).

[1] R. C. Gonzalez and R E. Woods, Digital Image Processing. Englewood Cliffs, NJ: Prentice-Hall, 2004.
[2] Faisel G. Mohammed, Huda M. Rada and Sega G. Mohammed, "Contrast and Brightness Enhancement for Low Medical X-Ray Im- ages", International Journal of Scientific & Engineering Research, vol. 4, Issue 5, May 2013.
[3] R. Pushpavalli, and G.Sivaradje, "Switching Median Filter for Image Enhancement", International Journal of Scientific & Engineering Re- search, vol. 3, Issue 2, Feb 2012.
[4] Ashwini Sachin Zadbuke, "Brightness Preserving Image Enhance- ment Using Modified Dualistic Sub Image Histogram Equalization", International Journal of Scientific & Engineering Research, vol. 3, Issue 2, Feb 2012.
[5] Narasimhan K, Sudarshan C R, Nagarajan Raju, "A comparison of contrast enhancement techniques in poor illuminated gray level and color images," International Journal of Computer Applications, vol. 25, pp.17– 25, 2011.

Abstract: In this paper, develop and compare two types of image enhancement method using fuzzy logic. Fuzzy logic and histogram based algorithm for enhancing low contrast color images and another contrast enhancement technique using the concept of homomorphic filtering with fuzzy logic. These two methods have been compared with conventional contrast enhancement techniques. These methods are computationally fast compared to conventional and other advanced enhancement techniques. The performance of these contrast enhancement algorithms are evaluated based on the visual quality............

Keywords - Fuzzy Logic, Image Enhancement, Homomorphic Filtering.

[1] Kim Y-T, "Enhancement using brightness preserving bi- histogram equalization," IEEE Trans Consum Electron, Vol.3, February 1997.
[2] ZhiYu C, Abidi BR, Page DL, Abidi MM,"Gray-level grouping (GLG): an automaticmethod for optimized. Image contrast enhancement part I: the basic method,"IEEE Trans Image Process, August 2006.
[3] Yen-Ching Chang1, Chun-Ming Chang2, Li-Chun Lai3, and Liang-Hwa Chen, "Contrast enhancement and visual effects based on gray level grouping," Journal of Marine Science and Technology, Vol.22,513-518 2014.
[4] R. P. M. Mancuso, GG. Rizzotto, "A Fuzzy Filter for Dynamic Range Reduction and Contrast Enhancement," MIEEE World Congress on Computational Intelligence: 3rd IEEE Conference on Fuzzy Systems, 1994.
[5] Hanmandlu M, Jha D., "An optimal fuzzy system for color image enhancement," IEEE Trans Image Process, Vol.10,2956-66,October 2006.