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.
A chipless RFID tag that exhibits a variable cross-polar response depending on its orientation with respect to the probing wave is investigated as a potential candidate for realizing an angular rotation sensor. The chipless sensor can be employed in harsh environments due to the absence of any silicon chip.
Mobile Wireless Sensor Networks (MWSNs) can be defined as a wireless sensor network (WSN) in which sensor nodes are mobile. It has recently become an area of attractive research interest. MWSNs have been attracting increasing interest for supporting a new generation of ubiquitous computing systems with great potential for many applications. However, the communication paradigms in this type of network...
This paper considers the problem of sensor selection for the estimation of a stochastic source, being the sensor nodes powered by energy harvesting. Therefore, the interest lies in selecting the subset of most informative sensors that transmit their observations to a fusion center (FC). To that end, we propose to minimize the attained distortion at the FC plus a penalization term that promotes sparsity...
Aiming at issues of load imbalance and low energy efficiency in the existing underwater sensor network clustering algorithm, a novel global optimal clustering algorithm with the low complexity and parallel processing is proposed. The algorithm is based on the basic idea of particle swarm optimization algorithm (PSO). After the binary initial code of the sensor nodes, the particle code is adjusted...
The advance in wireless sensor networking technology is increasing the number of control systems that use these networks to transmit the relevant variable to be measured and controlled, despite of the more intense distortions caused by wireless channels. The performance of wireless communications systems is mainly limited by fading produced by multipath propagation. In order to minimize the fading...
This paper presents a lightweight video sensor node for moving object surveillance using region-of-interest (ROI) based coding and an on-line multi-parameter rate controller. The proposed ROI-based coding scheme determines ROI blocks, pre-processes non-ROI blocks using bit-truncation, and encodes all blocks using Motion JPEG. The on-line rate controller modulates the parameters of the ROI-based coding...
Error-Control Coding (ECC) now plays an important role in wireless transceivers because it helps to increase link reliability and lower required transmit power. One popular problem of ECC implementation is the trade-off between high coding-gain and decoder's complexity. In this paper, we propose a serial concatenated ECC solution which is a combination of truncated-iteration layered-decoding LDPC...
The issue of energy efficiency for processing multirate signal for wireless sensor network with the aim of increasing channel capacity and delay improvement is addressed. Different types of coding and modulation techniques are used to choose devices from different transmission rates. In a multichannel network the selection of link rate is difficult. In this paper we tried to focus on solution of link...
To research the optimal path problem in wireless sensor network (WSN), Genetic Algorithms, Differential Evolution, Particle Swarm Optimization and Dijkstra algorithm are used in this study. Experimental comparisons show that the different algorithms may represent obvious difference under different network size. During small-scale network, the Dijkstra algorithm needs the least run time and obtains...
Traditional routing mode is just responsible for receiving and forwarding data packets. The proposing of network coding offers a new research direction for the development of wireless sensor networks(WSN) [1]. Preliminary theoretical studies and experiments have shown the advantages of network coding which can improve throughput and reduce energy consumption in WSN [2,3]. By linear coding operation,...
The technology of the distributed compressed sensing is thought as an extension of compressed sensing and it makes applying multiple signals into compressed sensing possible. A vital issue in distributed compressed sensing is to minimize the difference between the original signal and the recovery signal. In this paper, we improve the distributed compressed sensing for smooth signals in wireless sensor...
In this paper, we consider a fully connected device-to-device communications network, where a group of devices with heterogeneous channel capacities cooperate with each other to recover their missing packets. In such cooperative network, we aim to minimize the completion time required for recovering all missing packets at devices using instantly decodable network coding (IDNC). In particular, we first...
The paper presents a novel short-range wireless sensor node architecture, based on Integral Pulse Frequency Modulator (IPFM) and Ultra-Wideband (UWB) pulse generator. Due to the lack of internal clock signal source and multi user implementation without application of a microprocessor, the architecture is simple and energy efficient. Multi-user coding is performed using delay elements, where each user...
We design rateless codes for correlated multi-source relay networks over packet erasure channels. In particular, we optimize relay combining process of distributed Luby transform (DLT) codes for a multi-source single-relay network where information data is correlated among the sources. Density evolution is used to characterize the asymptotic performance in terms of unrecovered information symbols...
Cooperative communication uses spatial diversity to mitigate multipath fading. With an appropriate assignment of partners it also decreases the energy expenditure of the network. Together with optimum transmit power allocation, it is a useful technique to overcome the energy constraint problem in wireless sensor nodes. The calculation of optimum power in a Rician fading channel is a computationally...
An efficient framework of distributed compressive video coding using Enhanced side information for WSN is proposed. At the encoder, the incoming video frames are split into key frames and Wiener-Ziv (WZ) frames depending on Group of Picture (GOP). Based on Distributed Video Coding (DVC) these frames are processed independently and transmitted over WSN. Generally the WZ frames are encoded at a lower...
A high-speed start-up and low-power decoding circuit for wireless sensor networks is presented. The Manchester code that is currently used for Ethernet (10BASE-T), noncontact IC cards, and RFID systems requires a phase-locked loop because the intervals of the state transition change. In the proposed circuit, state transitions occur periodically at the center of a waveform owing to the use of an encoding...
Coverage problem is a fundamental issue in designing efficient wireless sensor networks, in which both coverage rate and energy consumption should be considered. A brain storm optimization algorithm is a swarm intelligence algorithm which is inspired by the human brainstorming process. This paper will focus on the application of the brain storm optimization algorithm in full coverage problems of wireless...
Energy efficiency is one of the most important design metrics for wireless sensor networks. As sensor data always have redundancies, compression is introduced for energy savings. In this paper, a lightweight compression algorithm for data with spatial correlation is proposed, which can be implemented on resource constrained nodes to reduce the total energy costs in the whole networks. By adopting...
In Wireless Sensor Networks energy (WSN) resources are limited. Most of the energy in a WSN is consumed in communication between the sensor nodes. Packet size is one of the important parameter of the wireless communication. Larger packets have low energy consumption per bit. However larger packets are less reliable. This paper studies packet size optimization in a WSN based on energy throughput and...
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.