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Journals
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Selvakumar, K.
- Micro Size Ultrasonic Transducer for Marine Applications
Abstract Views :678 |
PDF Views:125
Authors
Affiliations
1 School of Electrical and Electronics, Faculty of Engineering and Technology, SRM University, IN
1 School of Electrical and Electronics, Faculty of Engineering and Technology, SRM University, IN
Source
Indian Journal of Science and Technology, Vol 4, No 1 (2011), Pagination: 8-11Abstract
We address the advancement and development of MEMS ultrasonic transducer for underwater applications. The development of MEMS transducer is investigated and proved that it is a viable concept. The flexibility in tailoring their frequency and acoustic impedance increases the potential of their application in various fields. Compared to conventional, MEMS offer the advantage of superior performance as far as bandwidth is concerned. In spite of their lower coupling coefficient, there is a potential for significant improvement. We present the latest design of the piezoelectric, pressure and capacitive transducers. The material employed, method utilized in development, performance and capacity of each transducer is presented. Finally, the importance and needs for modeling and simulation is discussed. Currently we design and modeling a micro size transducer in Intellisuite software.Keywords
MEMS, Acoustics Transducer, Underwater ApplicationsFull Text
References
- Akasheh F, Myers T and Fraser A (2004) Development of piezoelectric micro-machined ultrasonic transducers. Sensors Actuators A. 1, 275-287.
- Aravamudhan S and Bhansali S (2008) Reinforced piezoresistive pressure sensor for ocean depth measurements. Sensors Actuators A. 142, 111–117.
- Arshad MR (2009) Recent advancement in sensor technology for underwater applications. Indian J. Marine Sci. 38(3), 267-273.
- Bernstein JJ, Houston K, Niles LC, Finberg SL, Chen, HD, Cross LE, Li KK and Udayakumar K (1997) Micro-machined high frequency ferroelectric sonar transducers. IEEE Trans. on ultrasonics, ferroelectrics & frequency control. 44(5), 960- 969.
- Chowdhury S, Ahmadi M and William C. Miller (2002) Design of a MEMS acoustical beamforming sensor array. IEEE Sensors J. 2, 6-11
- Ito M, Okada N and Takabe M (2008) High sensitivity ultrasonic sensor for hydrophone applications using an epitaxial PZT fil grown on SrRuO3/Pt/_-Al2O3/Si. Sensors Actuators A. 1, 278-282.
- Jin X, Ladabaum I, Butrus T and Khuri-Yakub (1998) The micro-fabrication of capacitive ultrasonic transducers. J. Micro electromech. Sys. 7, 3-9.
- Mescher M, Houston K and Bernstein J (2002) Novel MEMS micro-shell transducer arrays for high-resolution underwater acoustic imaging applications. Proc. of the IEEE Sensors. 1, 541-546.
- Oralkan O, Sanli Ergun A and Khuri- Yakuh T (2002) Capacitive micromachined ultrasonic transducers: Next generation arrays for acoustic imaging? IEEE Trans. on Ultrasonics Ferroelectrics & Frequency Control. 49, 11-16.
- Zhu B and Varadan VK (2002) Integrated MOSFET based hydrophone device for underwater applications. Proc. of SPIE, 4700, 101-110.
- Analysis of Power-Aware and Stability Based On-Demand Routing Protocols for Mobile Ad Hoc Network
Abstract Views :145 |
PDF Views:3
Authors
Affiliations
1 Department of CSE, Annamalai University, IN
1 Department of CSE, Annamalai University, IN
Source
Wireless Communication, Vol 3, No 11 (2011), Pagination: 821-827Abstract
The Mobile Ad-Hoc Networks (MANETs) are wireless networks where a collection of mobile nodes may dynamically vary the topological structure. The design of efficient routing protocols is a fundamental problem in MANETs. Stability-based routing and Power-aware routing protocols are simulated. In this paper the Flow-Oriented Routing Protocol (FORP), Min-Max Battery Cost Routing (MMBCR) as representatives of the Stability-based routing and Power-aware routing respectively. FORP incurs the least number of route transitions, its tends to repeatedly use nodes lying on the stable path. MMBCR is most fair in terms of node usage and minimum energy consumed by per data packet whereas FORP incurs maximum energy consumed by per data packet. FORP gives higher values of packet delivery fraction. A high value of PDF indicates that most of the packets are being delivered to the higher layers and is a good indicator of the protocol performance. MMBCR make minimum use of power control by conserving the battery charge at the nodes while transferring data packets. Compared to that of the FORP, MMBCR have the smallest hop count and lowest end-to-end delay per data packet. The simulation of these protocols has been carried out by using NS-2 simulator. Five different simulation scenarios are generated and maximum node speed has been varied and other network parameters are kept constant during the simulation. The main objective of this paper is to implement the FORP and MMBCR and compare the performance metrics of route transitions, end-to-end delay, energy and packet delivery fraction.Keywords
AODV Protocol, DSR Protocol, FORP, MMBCR, and Wireless Network.
- An Efficient Method for Preventing Mobile Tracing Using Motion-Mix Over Mobile Wireless Nodes
Abstract Views :176 |
PDF Views:5
Authors
Affiliations
1 Department of Computer Science & Engineering, Annamalai University, Annamalainagar – 608 002, Tamil Nadu, IN
1 Department of Computer Science & Engineering, Annamalai University, Annamalainagar – 608 002, Tamil Nadu, IN
Source
Wireless Communication, Vol 3, No 12 (2011), Pagination: 902-907Abstract
Providing security and privacy in mobile ad hoc networks has been a major issue over the last few years. It is more challenging due to advances in techniques of eavesdropping, locating and fingerprinting wireless transmissions. In particular, the mobile ad hoc networks are vulnerable to passive attacks that threaten the privacy of communications. In this paper, we first investigate the emerging threat of venue privacy attacks (VPAs) to trace mobile wireless nodes. We then propose motion-mix as the solution. The motion-mix is a geographic area in which the relation between nodes is hidden. The motion-mix provides protection at all the layers of the protocol stack. The necessary conditions to implement motion-mix are then studied. We further verify the effectiveness of motion-mix against venue privacy attack using a simulated network security model. We prove that the probability of security breach is negligible with respect to the polynomial-bounded network scale. This notion is conforming to the existing security notions in computational cryptography, where the polynomial-bounded metric is key length.Keywords
Anonymity, Motion-Mix, VPA, MANET, Mobile Tracing, Security.- An Enhanced in-Depth Packet Inspection Based on Hierarchical Pattern Matching Algorithm
Abstract Views :168 |
PDF Views:3
Authors
Affiliations
1 Department of Computer Science & Engineering, Annamalai University, Annamalainagar – 608 002, Tamil Nadu, IN
1 Department of Computer Science & Engineering, Annamalai University, Annamalainagar – 608 002, Tamil Nadu, IN
Source
Networking and Communication Engineering, Vol 4, No 14 (2012), Pagination: 842-847Abstract
The most important technology for fast payload inspection is an efficient multi-pattern matching algorithm, which performs exact string matching between packets and a large set of predefined patterns. In this paper, we have proposed a novel Enhanced Hierarchical Multi-pattern Matching Algorithm (EHMA) for packet inspection. Based on the occurrence frequency of grams, a small set of the most frequent grams is discovered and used in the EHMA. EHMA is a two-tier and cluster-wise matching algorithm, which significantly reduces the amount of external memory accesses and the capacity of memory. Using a skippable scan strategy, EHMA speeds up the scanning process. Furthermore, independent of parallel and special functions, EHMA is very simple and therefore practical for both software and hardware implementations. Simulation results reveal that EHMA significantly improves the matching performance. The speed of EHMA is about 0.89-1.161 times faster than that of current matching algorithms. Even under real-life intense attack, EHMA still performs well. An intrusion detection system must reliably detect malicious activities in a network and must perform efficiently to cope with the large amount of network traffic. High attack detection accuracy can be achieved by using Conditional Random fields and high efficiency is achieved by implementing the Layered Approach. System is robust and is able to handle noisy data without compromising performance. To detect as many attacks as possible with minimum number of false alarms, i.e., the system must be accurate in detecting attacks.Keywords
Packet Inspection, Payload, EHMA, Intrusion Detection.- Sensor Node Failure Detection Using Round Trip Delay and Paths in WSNs
Abstract Views :147 |
PDF Views:2
Authors
Source
Wireless Communication, Vol 8, No 6 (2016), Pagination: 254-256Abstract
In recent years, applications of Wireless Sensor Networks (WSNs) have been increased due to its vast potential to connect the physical world to the virtual world. Also, an advance in microelectronic fabrication technology reduces the cost of manufacturing portable wireless sensor nodes. It becomes a trend to deploy the large numbers of portable wireless sensors in WSNs to increase the Quality of Service (QoS). The QoS of such WSNs is mainly affected by the failure of sensor nodes. Probability of sensor node failure increases with increase in number of sensors. In order to maintain the better QoS under failure conditions, identifying and detaching such faults are essential. In the proposed method, faulty sensor node is detected by measuring the Round Trip Delay (RTD) time of discrete round trip paths and comparing them with threshold value. Scalability of proposed method is verified by simulating the WSNs with large numbers of sensor nodes in NS2. The RTD time results derived in hardware and software implementations are almost equal, justifying the real time applicability of the investigated method. Necessity of received signal strength measurement in cluster head variation and assigning separate wavelength for each link in other fault detection techniques are overcome here.
Keywords
Round Trip Delay (RTD), Throughput- Enhanced K-Means Clustering Algorithm for Evolving User Groups
Abstract Views :214 |
PDF Views:0
Authors
Affiliations
1 School of Computing Science and Engineering, VIT University, Vellore - 632014, Tamil Nadu, IN
2 Department of Information Science and Technology, CEG, Anna University, Chennai - 600025, Tamil Nadu, IN
1 School of Computing Science and Engineering, VIT University, Vellore - 632014, Tamil Nadu, IN
2 Department of Information Science and Technology, CEG, Anna University, Chennai - 600025, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 24 (2015), Pagination:Abstract
To gain information about user interests in Web pages is needed to advance in Web security. An approach to pick up that information includes understanding the client's perusing conduct, examining the Web log records with the procedures of preprocessing and client clustering. Time spent on Web pages and the types of operations show the degree of a Web user's intention. The data set comprises of Web log files obtained by collecting the user logs during a six month period. A new enhanced K-means clustering algorithm proposed in this paper for grouping user based on their preferred Web content and their temporal constraints. The enhanced K-mean clustering calculates initial centroids instead of random choice and uses time intervals to heighten the security and performance. Utilizing this methodology, client access designs with comparable looking practices are assembled into a particular class amid a particular time interval. Also secured communication among the various users groups will be achieved through hill cipher technique.Keywords
Preprocessing, Security and Hill Cipher, Temporal K-Means Algorithm, Web User Categorization.Full Text
- Simulation and Modelling of 5-Level Single Phase Z-Source based Cascaded Inverter
Abstract Views :193 |
PDF Views:0
Authors
Affiliations
1 Department of EEE, SRM University, Chennai – 603203, Tamil Nadu, IN
1 Department of EEE, SRM University, Chennai – 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 43 (2016), Pagination:Abstract
Objectives: This paper illuminatessimulation and modelling of 5-level single phase Z-source based cascaded scheme inverter and its progress for output voltage twice the applied input voltage. Methods/Analysis: Z-source network utilizes a unique impedence network (L-C) combinations to connect with 5-level cascaded inverter, which gives unique features that cannot be obtained from the conventional inverter citcuits. Z-source network trounce the various restrictions of conventional voltage source inverter and current source inverters like reduced losses, voltage stress, improved output voltage. By using the shoot-through conditions the duty ratio of the proposed system can be speckled to achieve better output source voltage compare to conventional methods. This method is imitation using matlab - simulink with experimental results are verified using dsPIC controller. Findings: Z-source cascaded type H-bridge inverter facilitates to boost functional source voltage without any conservative dc - dc boost converters. The output source voltage of the planned system increased twice that of conventional inverter system and better current control is achieved.SPWM technique used to contorl the power switches placed in the proposed system. Novelty/ Improvement: The total harmonic level in the proposed system diminished and voltage stress in the each power switches also reduced. The method keeps away from the convention of dc/dc converter, diminishes the expenditure of the scheme and reduces voltage stress in the switches.Keywords
Cascaded Type H-Bridge Inverter (CHBI), Matlab/simulink, Sinusoidal based Pulse Width Modulation (SPWM), Z-source Network.Full Text
- Frequency Split Elimination of Short Range Wireless Power Transfer System by Active Matching Tuning Circuit
Abstract Views :145 |
PDF Views:0
Authors
Affiliations
1 Faculty of Engineering and Technology, SRM University, Kattankulathur - 603203, Tamil Nadu, IN
1 Faculty of Engineering and Technology, SRM University, Kattankulathur - 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objective: The main theme of this paper is to eliminate the frequency split in short range Wireless Power Transfer (WPT) system by magnetic resonance coupling. Analysis: The common basic two coils based magnetic resonance WPT system is taken for the analysis; the frequency and transfer coefficient are plotted for different dimensions of the coil. Using genetic algorithm, the lumped impedance parameters are determined, which is used for the tuning of the active matching circuit. Based on the experimental results it has been observed that the frequency split can be eliminated by tuning the matching circuit properly for the corresponding distance and higher efficiency can be achieved for short range. Findings: The frequency split elimination techniques can be used in dynamic transmitter and receiver wireless charging system. Application: This system can be employed in short range wireless power transfer such as neural implants, capsule robots, micro-robots and electric vehicle charging and so on.Keywords
Maximum Energy Efficiency, Magnetic Resonance, Wireless Charging.Full Text
- Emission Constraint Profit based Unit Commitment Problem using Improved Bacterial Foraging Algorithm
Abstract Views :161 |
PDF Views:0
Authors
Affiliations
1 Department of EEE, SRM University, Kattankulathur - 603203, Tamil Nadu, IN
2 Department of EEE, K. S. Rangasamy College of Technology, Tiruchengode - 637215, Tamil Nadu, IN
1 Department of EEE, SRM University, Kattankulathur - 603203, Tamil Nadu, IN
2 Department of EEE, K. S. Rangasamy College of Technology, Tiruchengode - 637215, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: The main objective function is to increase the Generation Companies profit and reduce the GHG gas emission of the thermal generating units. Methods/Analysis: During the most recent few centuries, emission control has become a very big problem of worlds concern due to the frequently increasing pollution of earth’s atmosphere. In order to reach the emission control in this paper the Improved Bacterial Foraging Algorithm (IBFA) is proposed. The Bacterial Foraging Algorithm is formed by foraging behavior of E-coli Bacteria in the human intestine. But the BF algorithm leads to some convergence problem while solving the large problems. So for improving the performance of the large problems the new integer coded Improved Bacterial Foraging Algorithm is proposed. Findings: The proposed method is implemented to the IEEE 39 bus10 unit system with one day time period. This proposed algorithm is simulated using MATLAB software and the output results are compared with traditional Unit Commitment Method. Novelty/Improvement: The restructuring of electric power industry is used to reform the electric supply industry. The generation scheduling of thermal generating units in deregulated environment is named as Profit Based Unit Commitment. In PBUC problem the normal Demand constraint is changed to modified power demand constraint to increase the GENeration Companies (GENCO) profit.Keywords
Emission Limitation, GENeration Companies (GENCO), Improved Bacterial Foraging Algorithm (IBFA), Profit Based Unit Commitment (PBUC), Unit Commitment (UC).Full Text
- Shuffled Frog Leaping Algorithm (SFLA) for Short Term Optimal Scheduling of Thermal Units with Emission Limitation and Prohibited Operational Zone (POZ) Constraints
Abstract Views :138 |
PDF Views:0
Authors
Affiliations
1 Department of EEE, SRM University, Potheri – 603203,Chennai,Tamil Nadu, IN
1 Department of EEE, SRM University, Potheri – 603203,Chennai,Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: The objective of this paper is to decide the startup and shut down status of thermal generating units to meet the fluctuating load over a limited period at a lowest cost and also with lowest emission. Methods/Analysis: This paper presents Shuffled Frog Leaping Algorithm to explain short term Unit Commitment Problem solution with regard to Emission limitation and Prohibited Operating Zone (POZ) constraint. Findings: Fuel cost savings can be obtained by proper commitment of the available generating units. The total operating cost includes both the fuel cost and cost associated with the startup, shut down and maintenance of units. A variety of constraints like spinning reserve, generation limit constraint, minimum up time, minimum down time, system power balance and response rate constraints like ramp up constraint, ramp down constraint and prohibited operating zone constraints are considered for investigation. Novelty /Improvement: The problem is solved using an integer coded Shuffled Frog Leaping Algorithm which offers a practical unit commitment problem. A MATLAB code has been developed to explain the unit commitment problem using SFLA. The results are extensively validated for standard IEEE 39 bus with 10 units system. The results obtained are compared with existing method.Keywords
Economic Dispatch (ED), Emission Limitation, Prohibited Operating Zone (POZ), Shuffled Frog Leaping Algorithm (SFLA), Unit Commitment (UC).Full Text
- Power Smoothening of Grid Connected Direct- Driven Permanent Magnet Synchronous Generator (PMSG) Wind Turbines
Abstract Views :145 |
PDF Views:0
Authors
Affiliations
1 Department of EEE, Knowledge Institute of Technology, Salem – 637504, Tamil Nadu, IN
2 Department of EEE, SRM University, Chennai – 603203, Tamil Nadu, IN
1 Department of EEE, Knowledge Institute of Technology, Salem – 637504, Tamil Nadu, IN
2 Department of EEE, SRM University, Chennai – 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: The main objective of this paper is smoothening of the power fluctuation of a variable speed PMSG wind generator with the help of Energy Capacitor System (ECS). ECS consists of a voltage source inverter, dc-dc converter and an ultra-capacitor bank including their control strategies. Methods/Analysis: In this paper two back-to-back voltage source Insulated Gate Biopolar Transistor (IGBT) converters controlled through highly efficient variable frequency drive control method is considered. By using this method, efficiency of wind farm can be improved and voltage regulation for interconnecting the wind farm with grid can be achieved. Findings: Recent application of power electronic devices and scaling up of MegaWatt (MW) wind turbines, Low-speed high torque Permanent Magnet Synchronous Generator (PMSG) has become the ultimate choice for wind power extraction. At present, a commercial PMSG based wind generator primarily makes use of a rectifier followed by an IGBT converter. Novelty /Improvement: The real power reference for ECS is generated accurately. Simulation is carried out through MATLAB/SIMULINK.Keywords
ECS, Grid Voltage Support Control, Maximum Power Extraction, PMSG Wind Generator, Reactive Power Control, Variable Frequency Drive Control, Voltage Source Converter.Full Text
- Implementation of 5 Phase 3 Level NPC Inverter using Space Vector Modulation
Abstract Views :134 |
PDF Views:0
Authors
Affiliations
1 Department of EEE, SRM University, Chennai - 603203, Tamil Nadu, IN
1 Department of EEE, SRM University, Chennai - 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: The implementation of five phase three level Neutral Point Clamped (NPC) inverter is illustrated using space vector modulation technique based on the optimized five vectors switching strategy. Methods/Analysis: In 5 phases 3 levels NPC inverter consists of 243 switching state vectors, which can be reduced to 113 states by optimized Space Vector Modulation (SVM) switching strategy. The system has 11 sectors, which is converted into 6 sectors in that sub regions can be identified by optimised technique in d-q voltage vector. Simulation results of the five phase three level neutral point clamped inverter using SVM verified using Matlab/Simulink. Findings: SVM utilities switching states among the available various redundant states to reduce the common mode voltage and capacitor balancing problem. Dwell time calculations for this proposed does not need of any lockup table and park transformation. It’s applicable for high power medium voltage, remote sensing and industrial applications. Novelty/Improvement: The 3level 5phase NPC inverter has improved power density of the machine, enhanced dissection of power source among the inverter legs, abridged amplitude and augmented frequency of the torque pulsation than the traditional inverters.Keywords
Neutral Point Clamped Inverter (NPCI), Optimised Space Vector Modulation (OSVM), Pulse Width Modulation Method (PWM), Switching States.Full Text
- Enhancement of Distribution System Loadability DG under Reconfigured Environment
Abstract Views :125 |
PDF Views:0
Authors
Affiliations
1 Department of Electrical and Electronics Engineering, SRM University, Chennai - 603203, Tamil Nadu, IN
1 Department of Electrical and Electronics Engineering, SRM University, Chennai - 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: In this paper a comprehensive analysis of DG is done under initial configuration (base case) as well as with the feeder reconfigured environment in order to minimize the losses and to enhance voltage stability index. Methods/Analysis: In today’s trend delivery of power to customers have become a major issue in the field of power systems, one as such solution to this issue is usage of small units named as Distributed Generators (DG) entered the area of distribution systems. Findings: With the involvement of DG’s, a given system can achieve an improvement in terms of reliability, stability and reduction of losses. It just not only by using DG alone will solve the issue, but also mainly we have to focus on its location, size and the type which has to be used. Application /Improvement: For this analysis a standard IEEE 33-bus and 69-bus test distribution system is taken under nominal load consideration and the results are tabulated.Keywords
Distributed Generation, Distribution System, Real Power Loss, Reconfiguration, Voltage Profile, Voltage Stability Index.Full Text
- Voltage Stability Assessment using Artificial Neural Networks
Abstract Views :193 |
PDF Views:0
Authors
Affiliations
1 Department of EEE, SRM University, Kattankulathur, Chennai - 603203, Tamil Nadu, IN
1 Department of EEE, SRM University, Kattankulathur, Chennai - 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 38 (2016), Pagination:Abstract
Objectives: To calculate the load flow analysis by using Artificial Neural Networks (ANN) and the Cascade Architecture (CC) with Levenberg-Marquardt (LM) algorithm is used for this proposed system. Methods/Statistical Analysis: Many conventional methods such as Newton-Raphson method, Gauss-Seidel method, AC load flow analysis etc., are used to estimate the load flow analysis of a power system. The major backdrops in using these methods are, using complex non-linear equations, iterative methods and time consuming. To overcome these problems, this paper discusses using Artificial Neural Networks (ANN) which reduces the time consumption in calculating load flow analysis. Findings: In the real-time planning and operation of a power system the major consideration is voltage stability assessment. The voltage instability in a power system will lead to a blackout condition. The continuous increase in load demand, changes in system conditions causes voltage collapse. So the on-line monitoring of voltage stability is a necessary condition. Application/Improvements: The output of the load flow analysis is used to calculate the Index that is used to maintain the system in stable limits.Keywords
Artificial Neural Networks (ANN), Cascade Architecture (CC), Levenberg-Marquardt (LM), Stability Index, Voltage Stability.Full Text
- Experimental Analysis of 2,3 and 4 Coil Wireless Power Transfer System with Different Medium and Distance
Abstract Views :153 |
Authors
Affiliations
1 Faculty of Engineering and Technology, SRM University, Kattankulathur-603203, IN
1 Faculty of Engineering and Technology, SRM University, Kattankulathur-603203, IN
Source
Indian Journal of Science and Technology, Vol 9, No 35 (2016), Pagination:Abstract
Objective: The main theme of this paper is to analyze the wireless power transfer system efficiency in real time with different medium, distance and angle between the source and load coil. Analysis: The transmitter side of Wireless Power Transfer (WPT) system connected to the supply and receiver side is connected with load. The analysis is carried out for 2, 3 and 4 coil system in experimental test setup. Based on the experimental results it has been observed that the 4 coil WPT system gives better performance as compared with other two. Also it shows higher efficiency, if the angle of orientation of the load coil is small with the source coil.Findings: The four coil WPT system can be used in low power wireless charging devices with the distance of 3 to 15c.m between transmitter and receiver. Application: This system can be employed in electric vehicle charging, Bio implants, microrobots and so on.Keywords
Magnetic Resonance, Maximum Energy Efficiency, Wireless Charging.Full Text
- A Study on QoS Improvement using MIMO-OFDM Technique
Abstract Views :198 |
PDF Views:0
Authors
Affiliations
1 Bharath University, Chennai – 600073, Tamil Nadu, IN
2 Strategy and Planning, BIHER, Chennai – 600073, Tamil Nadu, IN
3 Tamil Nadu College of Engineering, IN
4 SRM University, Chennai – 603203, Tamil Nadu, IN
1 Bharath University, Chennai – 600073, Tamil Nadu, IN
2 Strategy and Planning, BIHER, Chennai – 600073, Tamil Nadu, IN
3 Tamil Nadu College of Engineering, IN
4 SRM University, Chennai – 603203, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 35 (2016), Pagination:Abstract
Objectives: This paper elucidates the analytical study of the diversity schemes and the channel estimation techniques. Methods/Analysis: The future generation wireless communication systems require high speed data connection with lower bandwidth usage and high QoS with minimal system complexity. So, Multiple-Input Multiple-Output (MIMO) is one of the best and suitable solutions for future wireless system demands and not disturbing the bandwidth. MIMO offers spatial multiplexing and diversity gains. Findings: The combination of Orthogonal Frequency Division Multiplex (OFDM) with MIMO enables the users to get the advantages of both OFDM and MIMO and Spatial multiplexing concept is used in this system to increasing the spectral efficiency of a system. The signal fading is caused by destructive interference. Novelty/ Improvement: To improve the signal quality, we can use the different diversity schemes and channel estimation techniques and discussed in this paper detail.Keywords
Channel Estimation, Diversity Gain, MIMO, Multiplexing, OFDM.Full Text
- Antioxidant Assays in Pharmacological Research
Abstract Views :211 |
PDF Views:0
Authors
Affiliations
1 Department of Applied Biosciences, BioLim Centre for Life Science, Chennai, Tamil Nadu, IN
1 Department of Applied Biosciences, BioLim Centre for Life Science, Chennai, Tamil Nadu, IN