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Sharma, Sanjay
- Multiparameter Segmentation and Quantization of Brain Tumor from MRI Images
Abstract Views :634 |
PDF Views:181
Authors
Affiliations
1 Department of E & IE, Apeejay College of Engineering, Sohna, Gurgaon, Haryana, IN
2 Department of ECE, Thapar University, Patiala, Punjab, IN
3 Department of ECE, Apeejay College of Engineering, Sohna, Gurgaon, Haryana, IN
1 Department of E & IE, Apeejay College of Engineering, Sohna, Gurgaon, Haryana, IN
2 Department of ECE, Thapar University, Patiala, Punjab, IN
3 Department of ECE, Apeejay College of Engineering, Sohna, Gurgaon, Haryana, IN
Source
Indian Journal of Science and Technology, Vol 2, No 2 (2009), Pagination: 11-15Abstract
In this paper, a method for segmentation of brain tumor has been developed on 2D-MRI data which allows the identification (10-15 minutes operator time) of tumor tissue with accuracy and reproducibility comparable to manual segmentation (2-6 hours operator time) making the automatic segmentation practical reality for malignant tumors. In this scheme, after a manual segmentation procedure the tumor identification has been made for the potential use of MRI data for improving the approximate brain tumor shape and 2D visualization for surgical planning.Keywords
Brain Tumor, MRI, MATLABFull Text
References
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- Bountris P, Farantatos E and Apostolou N (2005) Advanced image analysis tool development for the early stage bronchial cancer detection. PWASET. 9, 151-156.
- Deng Y, Manjunath BS, Kenney C, Moore MS and Shin H (2001) An efficient color representation for image retrieval. IEEE Trans. Image Processing. 10 (1), 140-147.
- Dewalle Vignion AS, Betrouni N and Makni N (2008) A new method based on both fuzzy set and possibility theories for tumor volume segmentation on PET images. 30th Annual International IEEE EMBS Conference. 3122-3125.
- Epifano I and Ayala G (2002) A random set view of texture classification. IEEE Trans. Image Processing. 11(8), 859-867.
- Fadi Abu Amara and Abdel Qadar (2007) Detection of breast cancer using independent component analysis. IEEE EIT Proceedings. 236- 241.
- Gering D, Eric W, Grimson L and Kikinis R (2002) Recognizing deviations from normalcy for brain tumor segmentation. Medical Image Computing and Computer-Assisted Intervention (MICCAI), Tokyo Japan.pp:388-395 (http://link.springer. de/ link/service/series/0558/bibs/2488/24880388.htm).
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- Design of Programmable Digital down Converter for Wimax
Abstract Views :396 |
PDF Views:78
Authors
Affiliations
1 University College of Engg., Punjabi University, IN
2 Dept. ECE, Thapar University, Patiala, Punjab, IN
1 University College of Engg., Punjabi University, IN
2 Dept. ECE, Thapar University, Patiala, Punjab, IN
Source
Indian Journal of Science and Technology, Vol 2, No 3 (2009), Pagination: 20-21Abstract
Design of a programmable digital down converter (DDC) has been proposed, which can be used in digital receivers that meets IEEE 802.16d/e (WiMAX) standard in wireless communication system. The design is based on the idea of software radio technology and the theorem of multi-rate signal processing, It can be implemented on FPGAs and can replace traditional ASICbased digital down converters in high channel count Software-Defined Radios.Keywords
Cic Filter, Digital Down Converter, Half Band Filter, Software Defined Radio, WimaxFull Text
References
- Crochiere RE and Rabiner LR (1983) Multirate digital signal processing, Prentice Hall.
- Kyung-ho Hwang and Dong-ho Cho (2000) Software Defined Radio Technology. Telecommunications Review. 10 (1), 130-143.
- Lim YC, Yang R and Liu B (1996) The design of cascaded FIR filters. IEEE Intl. Symp. Circuits & Systems. 2, 181–184.
- Reed JH (2002) Software radio—A modern approach to radio engineering, Prentice Hall PTR.
- Mathematical Modeling of Power Amplifier with Memory Effects
Abstract Views :419 |
PDF Views:83
Authors
Affiliations
1 University College of Engg., Punjabi University; 2Dept. of ECE, Thapar University, Patiala, Punjab, IN
1 University College of Engg., Punjabi University; 2Dept. of ECE, Thapar University, Patiala, Punjab, IN
Source
Indian Journal of Science and Technology, Vol 2, No 3 (2009), Pagination: 22-23Abstract
Simulation has become a key issue in analyzing, optimizing and designing wireless systems. In this paper, a mathematical model for the power amplifier is implemented in Simulink to extend the RF Blockset to model wideband applications such as WCDMA. This model for the power amplifier implements a modified Saleh model. Saleh model is a quasi memory-less nonlinear model, and is converted into a straightforward and easy to implement model with memory effects.Keywords
Mathematical Modeling, Power Amplifier, Saleh Model, SimulinkFull Text
References
- Chang-Soo Eun (1995) Design and comparison of Nonlinear compensators. Ph.D. Thesis, University of Texas at Austin.
- Liu Taijun, Boumaiza S and Ghannouchi FM (2004) Dynamic behavioral modeling of 3G power amplifiers using real-valued time-delay neural networks. IEEE Trans on Microwave Theory and Techniques. 52 (3)1025-1033.
- Saleh A and Adel A (1981) Frequency-Independent and Frequency- Dependent Nonlinear Models of TWT Amplifiers. IEEE Trans on Communications. 29 (11), 1715- 1720.
- Takahashi Y, Ishikawa R and Honjo K (2007) Precise modeling of thermal memory effect for power amplifier using multi-stage thermal RCLadder network. IEICE Trans on Electronics. E90-C ( 9,1658-1663.
- Linearization of Volterra Series Model Power Amplifier for Wideband WCDMA Base Stations
Abstract Views :332 |
PDF Views:75
Authors
Affiliations
1 CEC, Landran; ECED, Thapar University, Patiala, IN
1 CEC, Landran; ECED, Thapar University, Patiala, IN
Source
Indian Journal of Science and Technology, Vol 2, No 3 (2009), Pagination: 32-33Abstract
Digital pre-distortion techniques are widely used in linearization of RF power amplifiers. In this paper Lookup- table (LUT) type Adaptive Digital pre-Distortion (ADPD) is presented. In this algorithm, an output signal of the Power Amplifier (PA) is used as reference signal. It is used to update the coefficients of the LUT, so that characteristics of the PA, such as temperature dependence, do not have influence on the convergence performances. Simulation results have been presented.Keywords
Digital Pre-distortion (DPD), Error Vector Magnitude (EVM), Power Amplifier (PA), Look-up-tableFull Text
References
- Ding L, Zhou GT. et al. (2004) A robust digital baseband predistorter constructed using memory polynomials. IEEE Trans. on Comm. 52 (1) 159-165.
- Kenington PB and Bennett DW (1996) Linear distortion correction using a feedforward system. IEEE Trans. Veh.Tech. 45, 474-480.
- Kenney JS and Leke A (1995) Wireless report: power amplifier spectral regrowth for digital cellular and PIIS applications. Microwave J. 3. 74-92.
- Ruchi Pasricha and Sanjay Sharma (2008) Digital Predistortion in WCDMA Power Amplifier using Embedded Processor. ICGST Intl. J. Program. Devices, Circuits Systems. 3, 1-10.
- Stapleton SP and Costescu FC (1992) An Adaptive Predistorter for a Power Amplifier Based on Adjacent Channel Emissions, IEEE Trans. Veh. Tech. 41 (1), 49-56.
- Strickland LP et al. (2001) CE phase III final review (July). Raytheon Systems Co.
- Axis Controlled Movement of Robot Using Brushless DC Motor Drive
Abstract Views :497 |
PDF Views:195
Authors
Affiliations
1 ECE Deptt., C.I.T.M. Faridabad, Haryana, IN
2 Thapar University, Patiala, Punjab, IN
3 E & IE Deptt., Apeejay College of Engg., Sohna, Gurgaon, Haryana, IN
1 ECE Deptt., C.I.T.M. Faridabad, Haryana, IN
2 Thapar University, Patiala, Punjab, IN
3 E & IE Deptt., Apeejay College of Engg., Sohna, Gurgaon, Haryana, IN
Source
Indian Journal of Science and Technology, Vol 2, No 4 (2009), Pagination: 36-39Abstract
This work attempts to study the simulation of the kinematics routine for the axis control of the robot using brushless DC motor drive. The main motivation is to perform kinematics routines as well as control the robot in real-time. The graphical user interfaces (GUI) has been developed in Matlab. The GUI has been designed such that the user can get a feel for the kinematics of the 5-axis articulated robot. The system was developed for demonstrating the basic trajectory planning method for the axis control of robot. Further the trajectory planning platform was tested for a particular experiment and was found to be accurate enough for experimental purposes. This comprehensive software package allows the user to learn the various aspects of serial manipulator basics and also helps in exploring the concepts better by working in real-time.Keywords
Brushless DC Motors, MATLAB, Simulink, GUI, Permanent Magnet Synchronous Motors, RobotFull Text
References
- Hunyár M, Kovács K, Németh K, Schmidt I and Veszprémi K (1998) Energy-Saving and Network- Friendly Electrical Drives (in Hungarian), Műegyetemi Kiadó, Budapest. ISBN 963 420 569 0.
- Korondi P and Hashimoto H (2003) Intelligent space as an integrated intelligent system. In: Proc. of the 15th Intnl. Conf. on Electrical Drives and Power Electronics EDPE. Podbanské (Vysoké Tatry). Slovakia, ISBN 80 89114 45 4. pp: 24-31.
- Lamár K (2002) DSP Control unit for a sensorless synchronous motor drive. Master's Thesis. Institute of Automation, Kandó Kálmán Faculty of Electrical Engineering,
- Miller THE (1989) Brushless Permanent-Magnet and Reluctance Motor Drives, Clarendon Press, Oxford.
- Precup RE and Preitl S (2004) Fuzzy logic decision rules in two input single output linear timevarying systems control. In: Proc. Symposium on Applied Computational Intelligence SACI 2004, ISBN 963 7154 25 4. pp: 69-78.
- Schmidt I, Vincze K and Veszprémi K (2000) Servo and Robot Drives. Műegyetemi Kiadó, Budapest.
- Schmidt I, Vincze K, Veszprémi K and Seller B (2001) Novel PWM current vector control method of the PM synchronous servo drive with rectangular field. EPE-PEMC. Kosice. 7, 75-80.
- Spong MW and Vidyasagar M (1989) Robot dynamics and control. John Wiley & Sons, New York.
- Turmezei P (2002) Einige Methoden der Erhöhung des Wirkungsgrades von Solarzellen, Kandó Conference 2002, Budapest, ISBN 963 7158 03 0.
- Turmezei P (2003) A few aspects on solarcellbased energy-supply of mechatronic-units (in Hunagrian), 3rd Intnl. Symposium on Mechatronics, Budapest, ISBN 963 7154 221.
- Yasuhiko D and Kinoshita S (1990) Brushless servomotors fundamentals and applications, Clarendon Press, Oxford.
- FPGA Based Design of Reed Solomon Codes
Abstract Views :387 |
PDF Views:83
Authors
Affiliations
1 ECE, Amity School of Engg.& Technol. Bijwasan, New Delhi-110 061, IN
2 Thapar University, Patiala, IN
1 ECE, Amity School of Engg.& Technol. Bijwasan, New Delhi-110 061, IN
2 Thapar University, Patiala, IN
Source
Indian Journal of Science and Technology, Vol 2, No 4 (2009), Pagination: 48-52Abstract
This paper presents a novel architecture design for forward error correction technique based on RS coding scheme for wireless applications. The design was created using System Generator for DSP tool from Xilinx and was simulated on Matlab/Simulink environment. The hardware description language source code for different blocks was generated and the design was subjected to severe functional and timing constraints using Xilinx Foundation series and ModelSim tools. Synplify Pro tool was finally used to synthesize the complete design. The overall architecture for RS Coder-Decoder was implemented on Xilinx Virtex-II XC2v250 device and consumed slices 1429 for the CODEC at a clock frequency of 90 MHz. The architecture design power consumption analysis was done using the Xilinx Xpower tool and it came out to be about 783 mW.Keywords
FPGA, Reed-Solomon CodingFull Text
References
- Martyn Riley and Iain Richardson ”An introduction to Reed-Solomon codes: principles, architecture and implementation “ IEEE Conference Proceedings, pp-122-126, New York,1998
- E. R. Berlekamp ‘Algebric coding theory” McHill New york 1968
- Barnaad & Saklar “Dgital communication” 2001
- Azaleah Amina P. Chio, Jonathan A. Sahagun, and Delfin Jay M. Sabido IX “VLSI implementation of a (255, 223) Reed-Solomonerror-correction codec “,SPIE Conference Proceeedings, pp. 256-261, Toronto, 2003
- Christian SchulerGMD FOKUS Kaiserin-“Code generation tools for hardware implementation of FECcircuits” Berlin, Germany IEEE journal published, vol 22, pp. 1233-1241, August , 1989
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- Sanjay Sharma, Sanjay Attri, R, C, Chauhan, “Low-Power VLSI Synthesis of DSP Systems”, Published in Elsevier Science B. V. INTEGRATION, the VLSI Journal, Issue 1-2, vol. 36, pp. 41-54, September 2003.
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- A Low-leakage Current Power 45-nm CMOS SRAM
Abstract Views :459 |
PDF Views:109
Authors
Affiliations
1 Dept. of Electronics and Communication Engineering, Thapar University, Patiala, IN
2 Dept. of Electronics and Communication Engineering, Institute of Technology and Management, Gwalior
1 Dept. of Electronics and Communication Engineering, Thapar University, Patiala, IN
2 Dept. of Electronics and Communication Engineering, Institute of Technology and Management, Gwalior
Source
Indian Journal of Science and Technology, Vol 4, No 4 (2011), Pagination: 440-442Abstract
A low leakage power, 45-nm 1Kb SRAM was fabricated. The stand-by leakage power of a 1K-bit memory cell array incorporating a newly-developed leakage current reduction circuit called a self-controllable voltage level (SVL) circuit was only 3.7 nW, which is 5.4% that of an equivalent conventional memory-cell array at a VDD of 1.8V. On the other hand, the speed remained almost constant with a minimal overhead in terms of the memory cell array area.Keywords
SRAM, Memory Cell Array, Leakage CurrentFull Text
References
- Kuroda T et al. (2009) A 0.9-V, 150-MHz, 10-mW, 4- mm2 2-D discrete cosine transform core processor with variable threshold-voltage (VT) scheme. IEEE J. Solid-State Circuits. 31(11), 1770-1779.
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- An Inventory Model for Decaying Items, considering Multi Variate Consumption Rate with Partial Backlogging
Abstract Views :472 |
PDF Views:0
Authors
Sanjay Sharma
1,
S. R. Singh
2
Affiliations
1 Research Scholar GEU, Dehradun, IN
2 Department of Mathematics, D.N. College, Meerut, IN
1 Research Scholar GEU, Dehradun, IN
2 Department of Mathematics, D.N. College, Meerut, IN
Source
Indian Journal of Science and Technology, Vol 6, No 7 (2013), Pagination: 4870-4880Abstract
In most of the research articles, demand is considered either constant or a function of single variable which is not practical; customers' purchasing deeds may be affected by factors such as selling price and inventory level consequently in the present study we have considered demand rate as a function of stock-level and selling price both. Various researchers considered the situation in which shortages are either completely backlogged or completely lost which is not realistic therefore in development of this model it is assumed that shortages are partially backlogged and the most realistic backlogging rate is considered. In this research, we proposed a partial backlogging inventory model for decaying items considering stock and selling price dependent demand rate in fuzzy environment. In developing the model demand rate, ordering cost, purchasing cost, holding cost, backordering cost and opportunity cost are considered as triangular fuzzy numbers. Graded mean integration representation method is used for defuzzification. A numerical example is provided to illustrate the problem. Sensitivity analysis of the optimal solution with respect to the changes in the value of system parameters is also discussed.Keywords
Inventory Model, Triangular Fuzzy Numbers, Signed Distance, Stock And Price Dependent DemandFull Text
References
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