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 this paper we study a wireless passive sensor network. The sensors are deployed to estimate the true values of multiple active target signals. The sensors forward their observation to a fusion center, which processes the observation of each sensor by a set of fusion rules. One achievement of this paper is proposing an unbiased estimator with minimized variance of errors. To do so, we optimize both...
This paper regards a network of wireless passive sensors, suitable for radar applications. The network observes multiple number of target signals to be estimated. We propose an unbiased estimator whose error is minimized by optimizing both the power allocation at sensor nodes and the fusion coefficients at the fusion center. Since the underlying optimization problems are subject to both the individual...
Mobile Ad-hoc Networks (MANETs) are one possible solution for infrastructure-independent communication in disaster scenarios. In such scenarios, communication is essential to coordinate first responders and safe lives. But mobile nodes in large areas face several challenges related to connectivity, resulting in frequent partitions and intermittent connections. Protocols as well as network access technologies...
Pressurized space modules of all types are at risk of depressurization due to leaking air. Leaks may be caused by space debris impact or structural aging and failure overtime. This paper addresses the issue of leak type detection by analyzing airborne ultrasonic waves through Fourier Decomposition and Singular Spectrum Analysis. Depending on the vessel material, size of the leak, and pressure gradient,...
Due to the constraints of satellite platforms and Inter-Satellite Links (ISL), very limited ISLs can be equipped on the satellites, making the ISLs intermittently available. Meanwhile, the Ground-Satellite Links (GSL) are also intermittent due to the rotation between the constellation and the earth. Intermittent connectivity of both ISLs and GSLs makes the satellite constellation network a typical...
This paper presents finite-length performance analysis for wireless super-dense networks comprising two multiway relays (SDN-2MWR) to support full data-exchange among massive number of users/devices over Rayleigh fading channels. In practice, finite-length analysis is important since the networks should serve users/devices with low latency indicated by short number of time-slots. Due to the nature...
PALSAR (Phased Array L-Band SAR) is a kind of L-Band SAR (Synthetic Aperture Radar) with each antenna in the system is varied by its phase to improve its performance. The PALSAR works in 1.27 GHz with varying bandwidth according to specified PALSAR system. Phased shifter is used to control each antenna's phase. Phase shifter is designed for specified frequency to reach better performance than usual...
Colleges and universities are entering a new age where the learning process is no more within the classroom. This learning is enriched by new instructional technologies and online interaction that enables the spectrum of in-classroom through distance learning. Students benefit from the ability to choose the mix of course types that best fits their learning style and availability of time. The primary...
Due to the limited data transmission capability, most of the sensor nodes in the wireless sensor networks(WSN) cannot send data to the base station directly. In most situations the data transfer has to be done by the means of multi-hop. Low Energy Adaptive Clustering Hierarchy(LEACH) is one of the most widely used multi-hop strategies. However, as there are many random factors interrelated with each...
Gaussian frequency shift keying is one of the most widely used modulation and demodulation scheme for wireless communication. In this paper, a novel digital GFSK modulation and demodulation system which designed for short-range wireless communication application is presented. A brand new architecture based on reconfigurable CORDIC is involved, thus saving about 640K-bits memory units. The modulation...
In this paper, a new type of high noise immunity short-range wireless communication system model is established. By analyzing and being compared with several kinds of commonly used Short-range wireless communication, we establish a UWB (Ultra Wide Band) communication system model and the transmission error rate expression by using STBC (Space-Time Block Coding) scheme. Also a solution to decrease...
Wireless microrobots are endowed with promising future for medical tasks. In this paper, a novel mechanism with screw jet motion for a hybrid microrobot. The microrobot has a compact structure. It consists of an outer shell, a screw structure and an o-ring magnet as an actuator, which is fitted inside the microrobot. It is driven by a rotational magnetic field which is generated by three-axis Helmholtz...
On behalf of the organization committee, it is our great pleasure to welcome you to the University of Edinburgh and Heriot-Watt University, in Edinburgh UK, for the 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2016. We are looking forward to hosting the world leading experts in signal processing for communications and networking who will share the...
The Internet of Things (IoT) requires a communication Infrastructure built from simple components to allow connecting a wide range of devices. Visible Light Communication (VLC) based on Light Emitting Diodes (LEDs) for light emission and reception provides an attractive and economical communication platform as many aspects of networking can be handled in software. We present a software-centric approach...
Understanding vehicle mobility is essential for devising successful protocols for vehicular communications. Vehicles move at varying speeds on roads whose complexities range from plain highway lanes to urban boulevards with intersections/circles, traffic lights and various points of interest on them. This mobility pattern combined with vehicle density fluctuations depending on location and time makes...
In Data Communication [1], when two or more stations send the data at the same time, there are possibilities that the data packets from different stations may collide. Thus, a protocol is required which may coordinate the data transfer among the computers that share the medium. One such MAC (Medium Access Control) Protocol uses sharing of the transmission channel using three methods namely token passing,...
Unattended Wireless Sensor Networks (UWSNs) are portrayed by long stretches of separated operation and altered or unpredictable interims between sink visits. The nonappearance of a trusted outsider suggests that current WSN trust administration plans are not appropriate to UWSNs. In this approach, we propose a trust administration plan for UWSNs to give effective and vigorous trust information stockpiling...
Li-Fi is an upcoming technology which transmits information through light at a very high speed when compared to present technology. Visible Light Communication(VLC) using LED is a promising technology for next generation in short range high speed data communication. In present shopping system there are many difficulties. We propose a working model for shopping with automatic product detection and...
Precise location information is crucial for many wireless sensor network (WSN) applications. Location aware WSN sensor nodes can normally exchange information by knowing each other coordinates. In this paper we study and evaluate an algorithm based on parametric loop division (PLD), where anchor nodes form a triangle which uses coordinate of anchor nodes for three-dimensional (3D) nodes localization...
In this paper, we propose a PTS-based approach to solve the high peak-to-average power ratio (PAPR) problem in filter bank multicarrier (FBMC) system with the consider of the prototype filter and the overlap feature of the symbols in time domain. In this approach, we improve the performance of the traditional PTS approach by modifying the choice of the best weighting factors with the consideration...
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.