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In this paper we preset implementation of an optimized Sobel edge detection algorithm on FPGA. The optimized gradient based edge detection method reduces the area up to 48.76% compared to existing gradient calculation unit, and also reduces propagation delay up to 51% compared to the area optimized architecture. The entire project is implemented on Spatran-3E FPGA board. VGA interface is used to display...
The power consumption is a major concern for emerging applications like mobile phones, digital cameras, pace makers and multimedia processors. The power consumption can decreases by number of ways. The multiple supply voltage design is a dominant technique for the reduction of power consumption in System on Chips/Cores. The System on Chips /Cores uses level shifters and the level shifter will become...
The IC technology is tremendously growing day by day to improve the performance of the circuits structure in a compact and high density form. This tiny IC arena started and introduced the Quantum-dot cellular Automata (QCA) to overcome the pitfalls of conventional CMOS technology throughput. In order to bring a new phase of IC design in an optimized & efficient manner, we proposed, cascading serial...
Multipliers are the key components of systems viz. FIR filters, Microprocessors, Digital Signal Processors etc. which demands high performance. The performance of these applications mainly depends on the numbers of multiplication done in unit time. In real time multipliers the speed and power are the major criteria, thus faster and power efficient multipliers are needed. This paper focuses on the...
Memory is the fundamental building block of any digital system. Most of the portable devices used today incorporate SRAM arrays which are vital memory elements. The significant role of reversible logic in designing such circuits is to reduce or completely eliminate power dissipation. According to survey, only few design methodologies have been proposed for the SRAM array and to the best of our knowledge,...
To get reduced area and power overheads in Synchronous elasticity implementation circuits. We are using combinations of various elasticity approaches with specific implementation technique. Elasticity refers a circuit in which circuits can tolerate arbitrary latency and delay variations in their computation units as well as communication channels. This paper gives different optimization approaches...
Most of the routing protocols in Wireless Sensor Networks (WSN) generally optimize for limited capabilities. Security is a serious concern. This paper proposes a novel method to bring in security into Destination Sequenced Distance Vector (DSDV) routing protocol. One of the main security issues in DSDV routing is that all nodes are assumed to be trustworthy. This makes the wireless sensor network...
Asynchronous systems are designed without any global clock signal. Here computation is achieved by a series of events represented by signal transition edges; hence the speed of computation is determined by the signal propagation delay of the asynchronous circuit and not on the global clock. Some notable problems in synchronous circuit design due to higher performance demand are clock skew, power dissipation...
In this paper, basically the delay and the noise margin parameter associated in the circuit has been analyzed. The paper gives a better approach for the reduction in delay variation and compares the result with different-different types of domino logic circuits. The other domino logic circuits used to discriminate the result of proposed circuit are footed domino logic circuit, footless domino logic...
Mobile devices with oodles of interfaces communicating concurrently through multi-homed access networks with a blend of wired and wireless transmission parameters need efficient data delivery. To suffice the need this paper investigates the impact of various retransmission policies viz. RTX-SAME, RTX-ASAP, RTX-LOSSRATE, RTX-SSTRESH, RTX-CWND, AllRtxSame, AllRtxAlt and FrSameRtoAlt on the throughput...
In this paper, we have chronicled the development of sound localization system based on TDOA (Time Difference of Arrival). Acoustic Source Localization (ASL) is a technique used to track and locate the exact location of a sound source using an array of microphones. The concept of ASL uses sound signals captured from an array of microphones and they are processed using TDOA localization method to estimate...
Low power consumption has become a highly important concern for the designs. Glitches contribute to the dynamic power which itself is a major portion of the total power consumed by designs. A glitch is an undesired transition that occurs before intended value in digital circuits. A glitch occurs in CMOS circuits due to differential delay at the inputs of a gate. The paper describes a procedure to...
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