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In this paper, we present constant-coefficient finite impulse response (FIR) filters design using residue number system (RNS) arithmetic. The novelty of our approach rests in an attempt to maximize the accumulated benefit of the application of RNS to the design of constant coefficient filters. To achieve this, we consider the impact of RNS on many layers: from coefficient representation and techniques...
Over the last decade, significant progress has been made in the development of wearable sensor systems for continuous health monitoring in the home and community settings. One of the main areas of application for these wearable sensor systems is in detecting emergency events such as falls. Wearable sensors like accelerometers are increasingly being used to monitor daily activities of individuals at...
This paper analyzes workload characteristics and power usage of parallel high-performance computing system. According to the conclusions of the analysis, we propose two kinds of power-aware scheduling policies to reduce the power consumption of system by power down idle nodes reasoningly. Detailed experiments using data from the Parallel Workloads Archive indicates that both policies can achieve considerable...
In this article, the main design tradeoffs in design of ultra-low-power (ULP) and robust digital systems will be discussed. Here, the goal is to explore the main tradeoffs among design parameters such as device sizes and supply voltage, and system parameters such as robustness and energy dissipation. This study provides the necessary basis for design optimization and comparing the conventional CMOS...
For sensor networks, the extension of operating time by controlling power consumption is an important research subject. In a receiver-driven communication protocol, a receiver node transmits its ID to the sender node periodically, and in response the sender node sends an acknowledgment. The average power consumption of the network can be controlled, but a part of the network shuts down when the battery...
In any general purpose processor the use of conventional full precision multipliers results in increase in the power, area and computational time. So, multipliers being the basic key element of any computation unit take its own importance in decreasing the power as well as increase in the speed. Twin Precision Multipliers has flexible and reconfigurable computational units are creating a trend which...
Carry Select Adder (CSLA) is one of the fastest adders used in many data-processing processors to perform fast arithmetic functions. From the structure of the CSLA, it is clear that there is scope for reducing the area and power consumption in the CSLA. This work uses a simple and efficient transistor-level modification to significantly reduce the area and power of the CSLA. Based on this modification...
As process technology shrinks, the adaptive leakage power compensation scheme will become more important in realizing high-performance and low-power applications. In order to minimize total active power consumption in digital circuits, one must take into account sub-threshold leakage currents that grow exponentially as technology scales. This describes to predict how dynamic power and sub-threshold...
Energy efficiency has become one of the most important challenges in designing large-scale clusters due to the commercialized computer components. Traditionally, load balancers are employed by clusters to improve system performance and scalability. However, those balancers do not consider the energy used by the clusters. A power-aware cluster scheduler has been proposed in the community by concentrating...
The shuffle operation is one of the bottlenecks invector DSPs. The partitioning problem of the shuffle matrix will have a great effect on the design of the shuffle unit, when dealing with the small grain data shuffle using a smaller-sized crossbar. The traditional matrix block partitioning solution will bring much chip area, power consumption and critical path delay. This paper presents a new matrix...
The early success of wireless sensor networks has led to a new generation of increasingly sophisticated sensor network applications, such as HP's CeNSE. These applications demand high network throughput that easily exceeds the capability of low-power 802.15.4 radios that are most commonly used in today's sensor nodes. To address this issue, this paper investigates an energy-efficient approach to supplementing...
The problem of cooperative intrusion detection in resource constrained wireless networks (e.g., adhoc, sensor) is challenging, primarily because of the limited resources available to participating nodes. Although the problem has received some attention from the research community, little is known about the tradeoffs among different objectives, e.g. network performance, power consumption, delay in...
With ever-increasing power densities, managing on-chip temperatures by optimizing mapping and scheduling of tasks is becoming increasingly necessary. We study the minimization of end-to-end delay for thermally constrained scheduling of an application that is specified as a task graph and is executing on parallel processors without speed scaling. We show that task graph scheduling on thermally constrained...
Pulsed bias is an innovative technique introduced to improve the performance of oscillators in integrated circuits and is based on recent development of Floquet eigenvectors theory. Given the relatively low value of resonator quality factor achievable on-chip, for a specified bias voltage level, pulsed bias may result in a lower power consumption and in an improvement of the spectral purity of the...
One of the challenges of the near future for a more renewable Dutch electricity infrastructure is the embedding of high concentrations of heat pumps in currently built domestic residences. In the Dutch situation demand of electricity occurs simultaneously with demand of heat, high electricity peak loads in the low voltage network are expected. This study focuses on domestic residences with high peak...
Medium access control (MAC) protocol plays a crucial role in energy-efficiency, latency reduction and throughput for sensor networks. However, it is nontrivial to achieve good performance in different facets of metrics at the same time. In this paper, we present the performance of an Adaptive Scheduling MAC (AS-MAC) protocol with different Adaptive Scheduling period (AS-period) in multi-hop networks...
In this paper, we propose a method for the multi-objective mapping of applications onto matrix-based nanocomputer architectures. These architectures are composed from reconfigurable logic cells interconnected according to a given topology. The power consumption and data propagation delay of each cell depend on its internal function, e.g. NAND, OR, etc. By taking into account these cell characteristics,...
As the VLSI technology advances into the deep submicron era, power consumption becomes a critical issue for designing a high performance chip. Voltage-island design methodology based on multiple supplying voltages is one of efficient ways to reduce overall power consumption. This work proposes an algorithm to complete an X-clock tree that connects several voltage-islands. We first construct the X-clock...
We analyze a sleep mode operation in IEEE 802.16m mobile WiMAX. We construct a 3-dimensional embedded Markov chain for the sleep mode with both uplink and downlink Poisson packet arrivals. We obtain the average power consumption and the average packet delay. The analytical results match with simulations very well. Performance evaluations show that there is a trade-off between the power consumption...
Reduction of power consumption is one of an important issue in wireless communications because most mobile devices are battery-driven. There are many power saving techniques for use in a wireless LAN (WLAN) environment at the hardware level and at the MAC protocol level. Their common strategy for power saving is to stay in sleep mode, which consumes very little energy, for as long as possible when...
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