The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In recent years, approximate computing has emerged as a promising approach to trade off quality of computed outputs for energy savings. In this paper, we present an approximate high-level synthesis (AHLS) approach that outputs a quality-energy optimized register-transfer-level implementation from an accurate high-level C description. Existing AHLS work only considers switching activity for energy...
In this paper, we aim to develop an efficient speculation framework for a heterogeneous cluster. Speculation is a common mechanism that identifies ‘slow’ node in a cluster and starts redundant tasks on other nodes to guarantee the reliability. We consider MapReduce/Hadoop as a representative computing platform, and our general goal is to accurately and quickly identify the straggler nodes during the...
High sampling rate Analog-to-Digital Converters (ADCs) can be obtained by time-interleaving low rate (and thus low cost) ADCs into so-called Time-Interleaved ADCs (TI-ADCs). Nevertheless increasing the sampling frequency involves an increasing sensibility of the system to desynchronization between the different ADCs that leads to time-skew errors, impacting the system with non linear distortions....
The paper introduces a new loop-based method to measure end-to-end packet delay in software-defined network infrastructures. Although the method generates auxiliary service packets, it does not require any complementary support from the switching hardware. The prototype implementation shows the method is able to provide one-way delay values with microsecond precision on a steady load. Direct application...
In hardware/software co-design for a multi-core platform, a crucial role is played by fast and accurate early performance estimation. One type of such estimation that is as fast as native simulation, cycle-approximate and applicable to both software and custom hardware is Transaction Level Model (TLM) Estimation that depends on TLM simulation. For every platform selection and mapping, however, the...
Protocols for neighbor cardinality estimation can be used by a node in an ad hoc or sensor network to obtain a fast approximation of the number of nodes in its radio range. While the performance of such estimators was studied via simulations and mathematical analysis, we show here for the first time a proof-of-concept and performance test with an implementation on low-power wireless sensor devices...
Counting and identifying neighboring active nodes are two fundamental operations in wireless sensor networks (WSNs). In this paper, we propose two mechanisms, Power based Counting (Poc) and Power based Identification (Poid), which achieve fast and accurate counting and identification by allowing neighbors to respond simultaneously to a poller. A key observation that motivates our design is that the...
This paper proposes a unified architecture for designing Residue Number System (RNS) based processors for moduli sets with an arbitrary number of channels. Recently, new RNS moduli sets have been proposed in order to increase the dynamic range and reduce the width of the channels. The proposed architecture allows designing forward and reverse RNS converters, as well as the arithmetic operators of...
Time delay estimation is a fundamental subject in the field of source localization. Although many accurate approaches were proposed to estimate time delay, only some of them are implementable. We propose two approaches based on average square difference to estimate time delay in adverse conditions. In this way we estimate time delay between two sensors signals. In these approaches a bufferable matrix...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.