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In this paper, we propose an efficient motion adaptive de-interlacing algorithm with edge-oriented low-complex interpolation (LCI) based methods. The proposed algorithm is composed of the improved 4-field motion detection and three de-interlacing modes, which are the inter-field average, the LCI with the expanded edge detection, and the 3-dimension (3-D) median LCI method. First, the proposed improved...
Voiced speech is produced by excitation of the vocal tract system with the quasiperiodic vibrations of the vocal folds at the glottis. These excitations have become significantly stronger when the vocal folds are fully opened or about to be closed. In this work, the focus is on estimating these instants of significant excitation using temporal phase periodicity present in the speech signal. Assuming...
Localization is an important research issue in Wireless Sensor Networks (WSNs). Recently, hop-count-based localization has been proposed as a cost-effective alternative to range-based localization algorithms. Traditionally, hop-counts between any pair of nodes can only take on integer values regardless of relative positions of nodes in the hop. We show that by partitioning a node's one-hop neighbor...
Currently, the field of wireless sensor networks (WSNs) is becoming increasingly important and a challenging research area. Advancements in sensor networks enable a wide range of environmental monitoring and object tracking applications. Moreover, multihop routing in WSN is affected by new nodes constantly entering or leaving the network. Therefore, nature based self-organized and independent mechanisms...
We proposed a fuzzy-logic-based dynamic bandwidth allocation (FLDBA) algorithm for upstream Ethernet passive optical network (EPON). In the proposed DBA algorithm, the optical line terminal allocates bandwidth to the optical network units in proportion to the priority category of the traffic class. Simulations were performed to prove the accuracy of the FLDBA algorithm by comparing the algorithm with...
With the rapid growing of internet and networks applications, data security becomes more important than ever before. Encryption algorithms play a crucial role in information security systems. In this paper, we have a study of the two popular encryption algorithms: DES and Blowfish. We overviewed the base functions and analyzed the security for both algorithms. We also evaluated performance in execution...
We propose a new approach to tackle the well known fuzzy c-means (FCM) initialization problem. Our approach uses a metaheuristic search method called Harmony Search (HS) algorithm to produce near-optimal initial cluster centers for the FCM algorithm. We then demonstrate the effectiveness of our approach in a MRI segmentation problem. In order to dramatically reduce the computation time to find near-optimal...
Commercial lithium-ion batteries are playing important roles as energy storage solutions for portable devices, automotive electronics and renewable energy systems. In order to maximize the performance of lithium-ion batteries, an advanced charging pattern is required. In this paper, a Taguchi-based algorithm is presented. Orthogonal arrays are implemented to determine the optimal charging pattern...
Coordinate rotation digital computer (CORDIC) based digital signal processing has become an important tool in consumer, communications, biomedical, and industrial products, providing designers with significant impetus for porting algorithm into architecture. Unfolded implementations of CORDIC algorithm can achieve low latency for rotation and various functions such as division, multiplication, logarithmic...
Recently, Adjih proposed a source independent multipoint relay (MPR) based localized construction for small sized connected dominating set (CDS). This MPR-based CDS does not need any knowledge of global network topology, which makes it attractive to the applications in mobile adhoc networks for providing routing backbone. In this work we introduce a reverse selection heuristics and provided self-stabilization...
In this paper, we developed a photovoltaic array reconfiguration algorithm to maximize the power that an array can provide a load. The algorithm reconfigures the array such that each element of the array is operated at its maximum power point. A switch topology was also designed to implement the algorithm using the minimum number of switches. Two parameters are used by the algorithm: array loaded...
We propose a fragment based algorithm for efficient target tracking under significant scale variation and partial occlusion. In contrast, none of the previous multiple part or fragment based algorithms are both scale adaptive and robust to partial occlusion. In our algorithm, the target is divided into a number of overlapping image fragments. Their color histograms are compared with those of candidate...
The Mellin transform (MT) is a form of a signal representation similar to Fourier transform (FT) which has been widely used in signal processing owing to its distinct properties like scale invariance. In this work, a 2D form of MT which is termed as 2D discrete Mellin transform (DMT) is introduced. The paper also proposes an area efficient, power aware and multiplier less VLSI architecture for 2D...
This paper presents the designed obstacle avoidance program for mobile robot that incorporates a neuro-fuzzy algorithm using Altera?? Field Programmable Gate Array (FPGA) development DE2 board. The neuro-fuzzy-based-obstacle avoidance program is simulated and implemented on the hardware system using Altera Quartus?? II design software, System-on-programmable-chip (SOPC) Builder, Nios?? II Integrated...
This paper establishes a framework for designing fast, robust, and distributed algorithms for solving network utility maximization problems with coupled objective functions. We use two case studies in wireless communications to illustrate the key ideas: reverse-engineering the algorithm based on the KKT conditions of the optimization problem, and proving the properties of the algorithms using monotone...
This paper presents an algorithm for thermal optimization formulation strategies for multi-heat generation of integrated circuit (IC) on printed circuit board (PCB). Weighted-sum approach for multi-objective genetic algorithm (WMOGA) with formulated initial placement and multi-constraints parameters (FIPMCP) are presented. FIPMCP is used for the components selection and components to PCB placement...
The paper presents a novel methodology to implement resource efficient 64-bit floating point matrix multiplication algorithm using FPGA. Approach uses systolic architecture using four processing element (PE's) that gives tradeoffs between resource utilization and execution time, results in reducing the routing complexity for dense matrix multiplication problems.
In order for the base station to respond quickly and efficiently to the uplink bandwidth request in broadband wireless access (BWA) networks using time-division duplex (TDD), a dual feedback control algorithm has recently been proposed. In this algorithm the bandwidth request is adjusted in accordance with both the length of the backlogged queue and the mismatch between packet arrival and service...
This paper proposes Taguchi's method for design of experiments to test market splitting algorithm of an electric power exchange. Such a mechanism is required because price-volume pairs of a trader are usually bound by confidentiality requirement and hence not available as test data. We also propose a novel and simple market splitting heuristic considering congestion management problem in a meshed...
Currently the DSP applications such as multimedia processing raise the demands to IC designers for more flexibility, higher performance and shorter time-to-market. To solve these problems, this paper proposed a novel reconfigurable operator based IC design methodology for multimedia applications. Four kinds of reconfigurable operators and their logic meanings are introduced in this paper as well as...
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