IJEARST Volume 2, Issue 5, NOVEMBER 2016 Edition


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MODELING & DESIGNING OF AN ADVANCED GRID CONNECTED HYBRID BRIDGE BASED MULTI (FIVE) LEVEL STATCOM []


Abstract: In electric power system, the harmfulness to system because of lack of reactive power cannot be ignored. STATCOM (Static Synchronous Compensator)is an important member of Flexible AC Transmission System, comparing with traditional reactive power compensation device, it not only decrease the volume and cost of the device, but also has faster response speed and more smooth regulating property. On the basis of thorough analysis on reactive power compensation device in existence, this paper study on two, three & five-level STATCOM. The device uses neutral-point clamping method to divide the inverter circuit into positive, negative and zero three level, so that each component subject to the maximum voltage reduced to half of the traditional inverter circuit.


AN ADVANCED LOAD SHARING AND CIRCULATING CURRENT MINIMIZATION BY VOLTAGE QUADRUPLER FOR HIGH OUTPUT-VOLTAGE GAIN CONVERTERS FED STANDALONE MICRO GRID []


Abstract: An advanced symmetrical voltage quadrupler rectifier (SVQR) is derived in this paper to serve as the secondary rectification topology, which helps to extend the converter voltage gain and reduce the output diode voltage stresses. The output voltage is four times of the conventional full-bridge voltage rectifier with the same transformer ratio, which benefits to reduce the turns ratio of the transformer and decrease the parasitic parameters. Also, low voltage-rated diodes with high switching performance can be applied to improve the efficiency. Meanwhile, all the diodes in SVQR have the same voltage and current stresses, which simplifies the thermal design. Furthermore, two output electrolytic capacitors are connected in series to share the high output voltage, and the voltage balance can be realized naturally without any additional voltage-sharing scheme.

AN EFFICIENT RECOMMENDER SYSTEM BASED ON ONLINE RATINGS USING REGRESSION []


ABSTRACT: Recommender systems have been shown to help users find items of interest from among a large pool of potentially interesting items. Influence is a measure of the effect of a user on the recommendations from a recommender system. Influence is a powerful tool for understanding the workings of a recommender system. Experiments show that users have widely varying degrees of influence in ratings-based recommender systems. Proposed influence measures have been algorithm-specific, which limits their generality and comparability. We propose an algorithm-independent definition of influence that can be applied to any ratings-based recommender system. We show experimentally that influence may be effectively estimated using simple, inexpensive metrics.


PRIVACY AND OWNER AUTHORIZATION SYMMETRIC ENCRYPTION, WITH BLOOM FILTER []


Abstract : Explosive growth in the number of passwords for web based applications and encryption keys for outsourced data storage well exceed the management limit of users. Therefore outsourcing keys (including passwords and data encryption keys)to professional password managers (honest-but-curious service providers) is attracting the attention of many users. However, existing solutions in traditional data outsourcing scenario are unable to simultaneously meet the following three security requirements for keys outsourcing: 1)Confidentiality and privacy of keys; 2)Search privacy on identity attributes tied to keys 3)Owner controllable authorization over his/her shared keys. In this paper, we propose Cloud Key Bank, the first unified key management framework that addresses all the three goals above. Under our framework, the key owner can perform privacy and controllable authorization enforced encryption with minimum information leakage. To implement Cloud Key Bank efficiently, we propose a new cryptographic primitive named Searchable Conditional Proxy Re-Encryption (SC-PRE) which combines the techniques of Hidden Vector Encryption (HVE) and Proxy Re-Encryption (PRE) seamlessly, and propose a concrete SCPRE scheme based on existing HVE and PRE schemes. With Bloom Filter.


DESIGNING OF WIND FARM TO WEAK-GRID CONNECTION USING AN ADVANCED UPQC []


In this paper a compensation strategy based on a particular CUPS device, the Unified Power Quality Compensator (UPQC) has been proposed. A customized internal control scheme of the UPQC device was developed to regulate the voltage in the WF terminals, and to mitigate voltage fluctuations at grid side. The voltage regulation at WF terminal is conducted using the UPQC series converter, by voltage injection “in phase” with PCC voltage. On the other hand, the shunt converter is used to filter the WF generated power to prevent voltage fluctuations, requiring active and reactive power handling capability. The sharing of active power between converters is managed through the common DC link.
Therefore the internal control strategy is based on the management of active and reactive power in the series and shunt converters of the UPQC, and the exchange of power between converters through UPQC DC–Link. This approach increases the compensation capability of the UPQC with respect to other custom strategies that use reactive power only. The proposed compensation scheme enhances the system power quality, exploiting fully DC– bus energy storage and active power sharing between UPQC converters, features not present in DVR and D– Statcom compensators. Simulations results show the effectiveness of the proposed compensation strategy for the enhancement of Power Quality and Wind Farm stability.


DECOUPLED ACTIVE AND REACTIVE POWER CONTROL FOR LARGE-SCALE GRID-CONNECTED PHOTOVOLTAIC SYSTEMS USING CASCADED MODULAR MULTILEVEL CONVERTERS AND ALSO USING FUZZY LOGIC CONTROLLER []


ABSTRACT:Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters different controllers, such as pi &fuzzy logic controller. Renewable energy technologies such as Photovoltaic, solar thermal electricity using dishstirling systems, and wind turbine power are environmentally advantageous sources of energy that can be considered for electric power generation. Power distribution and controlling the cascaded PV system faces tough challenge on output voltage over modulation when considering the varied and non uniform solar energy on segmented PV arrays. Finally, a 3-MW, 12-kV PV system with the proposed control strategy is modeled and simulated in MATLAB/SIMULINK. A downscaled PV system including two cascaded 5-kW converters with proposed control strategy is also implemented by using the fuzzy logic controller. Simulation results are provided to demonstrate the effectiveness of the proposed control strategy for large-scale grid-connected cascaded PV systems.


A NOVEL PV DESIGN OF A THREE PHASE GRID CONNECTED SYSTEM BY A CONTEMPORARY MULTI LEVEL STATCOM []


ABSTRACT: This paper proposes a system of STATCOMs for the integration of a large photovoltaic (PV) plant with a utility AC grid. The system comprises of a central seven-level voltage-fed inverter (VFI) and a large number of PV modules with module-integrated DC-DC STATCOM. The seven-level VFI consists of three three-phase, three-level VFI units connected in parallel on the AC-side. This paper also proposes a new solar power generation system, which is composed of a DC/DC & DC/AC power STATCOM and a new seven-level inverter. This new seven-level inverter is configured using a capacitor selection circuit and a full-bridge power STATCOM, connected in cascade. Seven level converts fed with PV modules provide a viable solution to mitigating harmonic related issues caused by diode or thyristor rectifier front-ends. To handle the large compensation currents and provide better thermal management, two or more paralleled semiconductor switching devices can be used. The proposed PV based seven level topology can also produce seven voltage levels, which significantly reduces the switching current ripple and the size of passive components.The performance of the proposed power STATCOMs system is studied using MATLAB/Simulink.


A NOVEL PV DESIGN OF A THREE PHASE GRID CONNECTED SYSTEM BY A CONTEMPORARY MULTI LEVEL STATCOM []


ABSTRACT: Crane hook is very basic and reliable component used in most industries. The design of crane hook contains such parameters like cross section of hook, material and radius of curvature. We have selected the cross section as a basic parameter to optimize the hook design which carries 8tons load. The design is generated in NX-UG and analyzed in Hypermesh (FEM). In this project we have compared the circular cross section with trapezoidal cross section.


A NOVEL SUPER-CAPACITOR ENERGY STORAGE OF DFIG WIND TURBINES WITH AN ADVANCED FUZZY LOGIC CONTROLLER []


ABSTRACT: With the increasing penetration of wind power into electric power grids, energy storage devices will be required to dynamically match the intermittency of wind energy. This paper proposes a novel two-layer constant power control scheme for a wind farm equipped with doubly fed induction generator (DFIG) wind turbines with FUZZY control. Each DFIG wind turbine is equipped with a super capacitor energy storage system (ESS) and is controlled by the low-layer wind turbine generator (WTG) controllers and coordinated by a high-layer wind farm supervisory controller (WFSC). The WFSC generates the active power references for the low-layer WTG controllers according to the active power demand from or generation commitment to the grid operator; the low-layer WTG controllers then regulate each DFIG wind turbine to generate the desired amount of active power, where the deviations between the available wind energy input and desired active power output are compensated by the ESS with FUZZY controller. Simulation studies are carried out in MATLAB on a wind farm equipped with 15 DFIG wind turbines to verify the effectiveness of the proposed control scheme.


KEYWORD EXTRACTION AND CLUSTERING FOR DOCUMENT RECOMMENDATION IN CONVERSATIONS CLASSIFICATION FOR DETECTS THE NEGATIVE KEYWORDS []


ABSTRACT: Humans are surrounded by an unprecedented wealth of information, available as documents, databases, or multimedia resources. Access to this information is conditioned by the availability of suitable search engines, but even when these are available, users often do not initiate a search, because their current activity does not allow them to do so, or because they are not aware that relevant information is available. We adapt the perspective of just-in-time retrieval, which answers this shortcoming by spontaneously recommending words that are related to users‟ current activities by words accuracy we recommend the files which are suitable based on their conversations and additional we can predict the negative words on the conversations.


DOUBLY FED INDUCTION GENERATOR FOR WIND ENERGY SYSTEMS WITH A NOVEL SVPWM BASED INDIRECT MATRIX CONVERTERS INTERFACE []


ABSTRACT:In this paper wind power generation is used in standalone system due to their feature of high efficiency and low maintenance cost, which was fed with smart indirect matrix converter for indirect AC-DC-AC conversion, It provides sinusoidal output waveforms with minimal higher order harmonics and no sub harmonics and also it eliminate the usage of dc-link and other passive elements. Space vector modulation (SVM) controlled technique is used for matrix converter switching which can eliminate the switching loses by selected switching states. Proposed work is often seen as a future concept for variable speed drives technology. The matrix network offers other advantages, such as lower component ratings, reduced source stress and switch count, and simpler control strategies. The generator–grid interfaces described in this paper are based on the ultra sparse matrix topology characterized by the minimum number of semiconductor switches. A unique feature of the proposed model is that it requires very less computation time and less memory compared to the power circuit realized by using actual switches. In addition, it offers better spectral performances, full control of the input power factor, fully utilization of input voltages, improve modulation performance and output voltage close to sinusoidal. The proposed model for RL load was analyzed and verified by varying the resistor and inductance value and analyzed using MATLAB simulation.


A novel Symmetrical/Non-Symmetrical H-Bridge Flying Capacitor Multilevel Inverter (12 Pulse+7Level) Configuration Using For Especial Applications (DVR) []


ABSTRACT: This paper analyzes the structure of an 84-pulse voltage source converter (VSC), assembled by combining one twelve-pulse VSC, in conjunction with an asymmetric single phase seven-level converter plus an injection transformer. It restricts the compensating voltages during the sag whenever it predicts that a maximum limit for the flux linkage is about to be exceeded. The prediction is carried out at the beginning of a stabilized voltage sag. Moreover, the technique allows a certain level of sag compensation even when the estimated flux is expected to exceed the saturation limit. With this arrangement, the VSC output's total harmonic distortion in voltages is reduced, allowing it to be used in especial applications or as the basement of flexible A.C. transmission systems (FACTS) devices. The proposed strategy allows savings in the number of employed switches. Simulations and experimental results are provided to show the proposal appropriateness.


A DISTINCT COMBINATION OF MODULAR MULTI LEVEL –MULTI PULSE CONVERTER FOR A ESPECIAL APPLICATIONS (HVDC) []


ABSTRACT: This paper analyzes the structure of an 12-pulse 7 level voltage source converter (VSC), assembled by combining one twelve-pulse VSC, in conjunction with an asymmetric single-phase seven-level converter plus an injection transformer. The device performance, proven on a lab prototype, allows to verify the harmonic content of the resultant voltage signal. The exhibited low THD, permits the system to be used in especial applications or as basement of FACTS devices. The three-phase digital PLL used to detect the phase of the fundamental voltage, synchronizes the firing signals in all switches within a sample cycle. With this arrangement, the VSC output's total harmonic distortion in voltages is reduced, allowing it to be used in especial applications or as the basement of flexible A.C. transmission systems (FACTS) devices. The proposed strategy allows savings in the number of employed switches. Simulations and experimental results are provided to show the proposal appropriateness.


MODELING & ANALYSIS OF FLC BASED WIND POWER AND WAVE POWER GENERATION SYSTEMS USING A DC MICRO GRID []


ABSTRACT: Micro grid is a new concept in power generation. The Micro grid concept assumes a cluster of loads and micro sources operating as an advanced fuzzy logic controllable system that provides both power and load demand to its local area. Not much is known about Micro grid behavior as a whole system. Some models exist which describe the components of a Micro grid. In this paper, model of Micro grids with steady state and their transient responses to changing inputs are presented. The studied integrated system consists of a wind-power generator, a wave-power generator, a bidirectional DC/DC converter, and a grid-tied inverter. An energy-storage device is connected to the DC side of the proposed DC micro grid through a bi-directional DC/DC converter. Both wind-and wave-power generation systems are modeled and simulated using the written program based on MATLAB/Simulink.


A FUZZY BASED APPROACH OF TRANSFORMERLESS HYBRID POWER FILTER BASED ACTIVE HARMONIC FILTERING USING CURRENT-CONTROLLED DG UNITS []


ABSTRACT: Power system harmonics are a menace to electric power systems with disastrous consequences. The line current harmonics cause increase in losses, instability, and also voltage distortion. With the proliferation of the power electronics converters and increased use of magnetic, power lines have become highly polluted. Both passive and active filters have been used near harmonic producing loads or at the point of common coupling to block current harmonics. Shunt filters still dominate the harmonic compensation at medium/high voltage level, whereas active filters have been proclaimed for low/medium voltage ratings. In this project combination of a thyristor-controlled reactor (TCR) and a shunt hybrid power filter (SHPF) for harmonic and reactive power compensation. The SHPF is the combination of a small-rating active power filter (APF) and a fifth-harmonic-tuned LC passive filter. The tuned passive filter and the TCR form a shunt passive filter (SPF) to compensate reactive power.


AN EFFICIENT AND SECURE AUTHENTICATE FRAMEWORK FOR CLOUD COMPUTING []


ABSTRACT: Cloud computing has an important aspect for the companies to build and deploy their infrastructure and application. Data Storage service in the cloud computing is easy as compare to the other data storage services. At the same time, cloud security in the cloud environment is challenging task. Security issues ranging from missing system configuration, lack of proper updates, or unwise user actions from remote data storage. It can expose user’s private data and information to unwanted access. it consider to be biggest problem in a cloud computing. The focus of this study based on the secure cloud framework and to define a methodology for cloud that will protect user’s data and highly important information from malicious insider as well as outsider attacks. It also protects their data from service hijacking with LDAP authentication.


POWER QUALITY IMPROVEMENT IN A GRID BY AN IMPROVED UNIFIED POWER QUALITY CONDITIONER USING ANN WITH HYSTERESIS CONTROL []


ABSTRACT: The quality of the Electrical power is effected by many factors like harmonic contamination, due to non-linear loads, such as large thyristor power converters, rectifiers, voltage and current flickering due to arc in arc furnaces, sag and swell due to the switching of the loads etc. One of the many solutions is the use of a combined system of shunt and active series filters like improved unified power quality conditioner (IUPQC) This device combines a shunt active filter together with a series active filter in a back-to-back configuration, to simultaneously compensate the supply voltage and the load current or to mitigate any type of voltage and current fluctuations and power factor correction in a power distribution network. The present work study the compensation principle and different control strategies used here are based on ANN controller of the IUPQC in detail. The control strategies are modeled using MATLAB/SIMULINK. The simulation results are listed in comparison of different control strategies and for the verification of results.


A NOVEL FUZZY LOGIC CONTROLLER BASED ACTIVE AND REACTIVE POWER COMPENSATION FOR LARGE-SCALE GRID-CONNECTED PV SYSTEMS USING AN ADVANCED CASCADED MODULAR MULTILEVEL CONVERTERS []


ABSTRACT: Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters different controllers, such as pi &fuzzy logic controller. Renewable energy technologies such as Photovoltaic, solar thermal electricity using dish stirling systems, and wind turbine power are environmentally advantageous sources of energy that can be considered for electric power generation. Power distribution and controlling the cascaded PV system faces tough challenge on output voltage over modulation when considering the varied and non uniform solar energy on segmented PV arrays. Finally, a 3-MW, 12-kV PV system with the proposed control strategy is modeled and simulated in MATLAB/SIMULINK. A downscaled PV system including two cascaded 5-kW converters with proposed control strategy is also implemented by using the fuzzy logic controller. Simulation results are provided to demonstrate the effectiveness of the proposed control strategy for large-scale grid-connected cascaded PV systems.


TWO-STAGE INVERTER-& RECTIFIER BASED CONSTANT POWER CONTROL AND FAULT-RIDE-THROUGH ENHANCEMENT OF DFIG WIND TURBINES WITH ENERGY STORAGE AND PSS []


ABSTRACT: With the increasing penetration of wind power into electric power grids, energy storage devices will be required to dynamically match the intermittency of wind energy. This paper proposes a novel two-layer constant-power control scheme for a wind farm equipped with doubly-fed induction generator (DFIG) wind turbines. To enhance the robustness of stabilizing controllers against system uncertainties, this paper proposes a new coordinated robust control of doubly fed induction generator (DFIG) wind turbine equipped with power oscillation damper (POD) and synchronous generator installed with power system stabilizer (PSS) for stabilization of power system oscillations. Each DFIG wind turbine is equipped with a super capacitor energy storage system (ESS) and is controlled by the low-layer WTG controllers and coordinated by a high-layer wind-farm supervisory controller (WFSC). The WFSC generates the active-power references for the low-layer WTG controllers according to the active-power demand from the grid operator; the low-layer WTG controllers then regulate each DFIG wind turbine to generate the desired amount of active power, where the deviations between the available wind energy input and desired active power output are compensated by the ESS. Simulation studies are carried out in PSCAD/EMTDC on a wind farm equipped with 15 DFIG wind turbines to verify the effectiveness of the proposed control scheme.


AN EFFICIENT APPROACH FOR CONVERTING RELATIONAL QUERIES TO SPREAD SHEETS []


ABSTRACT:Data mining the extraction of hidden predictive information from large databases, is a powerful new technology with great potential to help companies focus on the most important information in their data warehouses. Spreadsheets are the desktop counterpart of databases and OLAP in enterprise scale computing. They serve basically the same purpose data management and analysis but at the opposite extreme of the data quality scale. We demonstrate that a spreadsheet can implement all data transformation definable in SQL merely by utilizing spreadsheets formulas. We provide a query compiler, which translates any given SQL query into a worksheet of the same semantics, including NULL values. Thereby database operations become available to the users who do not want to migrate to a database. They can define their queries using a high level language and then get their execution plans in a plain spreadsheets. Spreadsheets are among the most commonly used applications for data management and analysis. They combine data processing with very diverse supplementary features: statistics, visualization, reporting, linear programming solvers, Web queries periodically downloading data from external sources, etc. However, the spreadsheet paradigm of computation still lacks sufficient analysis.


A NOVEL WIND-POWER GENERATION SYSTEM WITH DUAL VOLTAGE SOURCE INVERTERS UNDER UNBALANCED GRID VOLTAGE CONDITIONS []


ABSTRACT:This paper presents an enhanced control method for a doubly fed induction generator (DFIG)-based wind-power generation system with series grid-side converter (SGSC) under unbalanced grid voltage conditions. The behaviors of the DFIG system with SGSC during network unbalance are described. By injecting a series control voltage generated from the SGSC to balance the stator voltage, the adverse effects of voltage unbalance upon the DFIG, such as stator and rotor current unbalances, electromagnetic torque, and power pulsations, can be removed, and then the conventional vector control strategy for the rotor-side converter remains in full force under unbalanced conditions. Meanwhile, three control targets for the parallel grid-side converter (PGSC) are identified, including eliminating the oscillations in the total active power or reactive power, or eliminating negative-sequence current injected to the grid. Furthermore, a precise current reference generation strategy for the PGSC has been proposed for the PGSC to further improve the operation performance of the whole system. Finally, the proposed coordinated control strategy for the DFIG system with SGSC has been validated by the simulation results of a 2-MW-DFIG-based wind turbine with SGSC and experimental results on a laboratory-scale experimental rig under small steady-state grid voltage unbalance.


DESIGN RADIX-2 FFT SYSTEM USING AN EFFICIENT AND FUSED FLOATING POINT BUTTERFLY []


ABSTRACT:A new VLSI architecture for real-time pipeline FFT processor is proposed in this project. This concept introduces a software reconfigurable OFDM system using a programmable fused-point DSP. In this project, both radix-2 floating point butterflies are implemented more efficiently with the two fused floating-point operations. The fused operations are a two-term dot product and add-subtract unit along with modified booth encoding algorithm. Both discrete and fused radix processors are implemented; compared in regarded with efficiency wise.


LOW DENSE AND LOW POWER BUS ARCHITECTURE USING MODIFIED ETI FOR SERIAL LINKS []


ABSTRACT: In this project, embedded transition inversion (ETI) is proposed to reduce bit transitions in Serializing parallel buses. Imply power can be reduced further. This project proposes an embedded transition inversion (ETI) coding scheme that uses the phase difference between the clock and data onto the transmitted serial data to tackle the problem of the extra indication bit as in case of Transition Inversion Coding (TIC).The technique considers a buffer of data to be a collection of bitstreams running in parallel over multiple lines. The transitions are counted in a bit serial fashion and used to determine whether the transitions in any given bitstream have to be inverted. This way the data running on any given line sequentially is encoded such a way it will have a reduced number of transitions.The technique is implemented in an optimized fashion using pipelining so that it can be used in practical systems with only a slight compromise in performance. This is achieved by calculating the decision using as the data is being loaded into the buffer and doing the encoding on the fly. This is one aspect which is lacking in most existing algorithms as they are not amenable to low delay implementation. In this paper,B2I(bit2 inversion) block is replaced with bulk of xor gates. Furthermore, area can be reduced with this enhancement when compared to existing ETI scheme. The simulations are done by Xilinx 14.5 software to get efficient output. The proposed system result analysis shows better than the existing method.


POWER OPTIMIZED FM0/MANCHESTER ENCODER USING SOLS AND CLOCK GATING TECHNIQUE []


ABSTRACT:The main objective of this project is to design a low power and reusable FM0/Manchester encoder for DSRC applications. Fully reused VLSI architecture using (similarity-oriented logic simplification) SOLS technique for both FM0 and Manchester encodings are proposed. Dedicated short-range communication is one-way or two-way short-range to medium-range wireless communication channels specifically designed for automotive use and a corresponding set of protocols and standards. The SOLS technique eliminates the limitation on hardware utilization by two core techniques: area compact retiming and balance logic-operation sharing. The balance logic-operation sharing efficiently combines FM0 and Manchester encodings with the identical logic components. Further, this project is enhanced by using clock gating technique to reduce the power consumption in memory organization.The power supply will be provided for corresponding accessed rows only.We have carried the simulation and verified the results using ISE simulator and synthesis is done on the XILINX ISE.


HIGH SPEED FAULT TOLERANT ARCHITECTURE FOR MULTI LEVEL PHASE CHANGE MEMORY []


ABSTRACT:The main objective of this project is to design a non-binary OLS code as applicable to multilevel a PCM. A PCM utilizes a multilevel scheme that permits to increase the storage density using ternary, quaternary and in the near future, octal cells. The resistance drift that occurs in a multilevel PCM due to the resistive characteristics of GST may cause errors in the stored information, thus degrading data integrity. The proposed codes utilize a non-binary scheme that is capable of correcting multi-symbol errors with a parallel decoder. Memory cells have been protected from soft errors for more than a decade; due to the increase in soft error rate in logic circuits, the encoder and decoder circuitry around the memory blocks have become susceptible to soft errors as well and must also be protected. A new approach to design fault-secure encoder and decoder circuitry for memory designs is introduced. The key novel contribution of this project is identifying and defining a new class of error-correcting codes whose redundancy makes the design of fault-secure detectors (FSD) particularly simple. OLS codes satisfies a new, restricted definition for ECCs which guarantees that the ECC codeword has an appropriate redundancy structure such that it can detect multiple errors occurring in both the stored codeword in memory and the surrounding circuitries. The parity-check Matrix of an FSD-ECC has a particular structure that the decoder circuit, generated from the parity-check Matrix, is Fault-Secure.


POWER OPTIMIZED FAULT TOLERANT FIR FILTERS USING MODIFIED HAMMING AND BOOTH ENCODING []


ABSTRACT: The main objective of this project is to design an efficient and error tolerant FIR filter using VHSCIHDL. In many cases, some of those elements operate in parallel, performing the same processing on different signals. A typical example of those elements is digital filters. A scheme based on error correction coding has been recently proposed to protect parallel filters. In that scheme, each filter is treated as a bit, and redundant filters that act as parity check bits are introduced to detect and correct errors. Further, this project is enhanced with modification in multiplier design. Here, in this context Radix8 modified booth encoding algorithm is used to reduce further power.


RELIABLE AND EFFICIENT ON CHIP BUS PROTOCOL USING AHB []


ABSTRACT:Designing an on-chip interconnection bus with more efficiency using modified AHB is main criteria in this project. A bridge between AHB master and slave with supportive application of MC is also proposed and the resultant efficiency in respect of area overhead and speed is provided. In the subject process, the design and implementation details of AMBA high-performance bus (AHB) master and slave with memory controller (MC) interface are discussed. Scalable encryption Algorithm is an enhanced algorithm for providing an efficient security for data. SEA provides area and power efficient implementation. It yields atmost secured bus interfacing data as enhancement for this project.


AN EFFICIENT AND ENHANCED ERRORCORRECTION CODE USING DMC AND MODIFIED CSA []


ABSTRACT:Transient multiple cell upsets (MCUs) are the major issues occurring in the memories exposed to radiation environment. More complex error correction codes (ECCs) are widely used to prevent MCUs from causing data corruption but their higher delay overhead is the main problem. Further, matrix codes (MCs) based on hamming codes have been proposed to memory protection. But MCs are double error correction codes and the error correction capabilities are not improved all times. In this project, decimal matrix code (DMC) based on divide-symbol is used, which enhances memory reliability with lower delay overhead. The DMC utilizes decimal algorithm to obtain the maximum error detection capability. Moreover, the encoder-reuse technique (ERT) is proposed to minimize the area overhead without disturbing the whole encoding and decoding processes. ERT uses the same DMC encoder itself to be part of the decoder. The proposed project uses square root Carry select adder in the DMC encoder section to improve the propagation delay. Further, this project is enhanced using Binary to Excess -1 Converter (BEC) instead of RCA to achieve lower area and power consumption.


AN EFFICIENT AND SECURED RFID COMMUNICATION FOR MULTI PURPOSE APPLICATIONS []


ABSTRACT:Radio Frequency Identification (RFID) is an electronic tagging technology that allows objects to be automatically identified at a distance without a direct line-of- sight using an electromagnetic challenge-and-response exchange of data. An RFID system consists of RF readers and RF tags. RF tags are attached to objects, and used as a unique identifier of the objects. Due to the computational power constraints of passive tags, non-encryption-based singulation protocols have been recently developed, in which wireless jamming is used. However, the existing private tag access protocols without shared secrets rely on impractical physical layer assumptions, and thus they are difficult to deploy. To tackle this issue, we first redesign the architecture of RFID system by dividing an RF reader into two different devices, an RF activator and a trusted shield device (TSD). Then, we propose a novel coding scheme, namely Random Flipping Random Jamming (RFRJ), to protect tags’ content. Further, as an enhancement different modulation schemes are used for different distinct users. Here, based on user distance; modulation scheme is used for power reduction applications.


IMPLEMENTATION OF LOW DENSE DISCRETE COSINE TRANSFORM USING VEDIC SUTRAS []


ABSTRACT: The main objective of this project is to design a recursive algorithm to obtain an orthogonal approximation of the DCT with half optimized complexity. This project presents a generalized recursive algorithm to obtain an orthogonal approximation of DCT where a pair of DCTs of length N/2 is used to derive approximate DCT of length N at the cost of N additions for input preprocessing. By using symmetry of basis vectors and perform recursive sparse matrix decomposition for deriving the proposed approximation algorithm. The proposed algorithm is highly scalable for hardware as well as software implementation of DCT of larger lengths, and they can be derived using the approximation of existing 8-point DCT to obtain approximate DCT of any power of two length, N>8. Further, this project is enhanced by using Vedic sutras. A technique of binary digits, decimal number multiplication is performed, and it is different from the conventional method of multiplication like Add and Shift. It presents a systematic methodology for high speed and area efficient Vedic Multiplier based on Vedic Mathematics. The multiplier architecture is based on the URDHVA TRIYAKBHYAM sutra of Ancient Indian Vedic Mathematics.



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