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.
The demand for the wireless communication is growing rapidly from last few years. Demand arises a lot of advancement in the communication. In this paper introduction of IDMA, complete analysis and comparison of IDMA with CDMA and OFDM is done for the single access channel. IDMA introduce the interleaving technique as means of user separation instead of digital signatures in CDMA and subcarriers in...
Canada's mining sector contributed $54 billion to its GDP in 2013. Mining operations are an important element of Canada's economy and rely heavily on mobile equipment for the transportation of rock-ore. Failure of mobile equipment, when it is required to be in available state prevents the successful flow of mining operations, and can result in production losses averaging in millions of tons, annually...
A power and bandwidth efficient resource allocation approach considering consumer's Quality of Experience (QoE) in the context of mobile video streaming is presented. Online QoE is estimated using Fuzzy Inference Systems. Compared to Quality of Service (QoS)-based techniques, the proposed QoE-enabled approach offers considerable saving in bandwidth and power.
Localization techniques in microcellular networks have been increasingly important for many applications especially for those who are looking for emergency call conditions. This paper propose a new approach for LOS and NLOS localization in an urban environment using a single base station (SBS) and the measured scattering distances by utilizing the effects of the time of arrival (TOA) and angle of...
In recent mobile systems, the fraction defective of the PCB channels increases with the increase of the PCB manufacturing process variation, when the other conditions affecting the PCB manufacturing are the same as before. From the experimental verification, we confirm that the distribution of the characteristic impedance is critically increased by the process variation. To reduce the fraction defective,...
This paper shows an implementation of a smart office energy management system that use Bluetooth Low Energy (BLE) beacons, smart plugs, and a mobile app, which provides the location-aware energy-saving service without user intervention. Moreover, this paper provides a reasonable realtime energy-saving estimation method by which more effective feedback for motivation can be conveyed to the occupant...
Localisation in wireless sensor network is the process of determining the geographical location of the sensor nodes. Conventional localization is space oriented which uses GPS (Global Positioning System) signal to obtain the location information of the nodes. But the GPS signals fail to work in indoor environments, the reason for which it becomes mandatory to opt for terrestrial localisation. The...
Indoor localization in multi-floor buildings is an important research problem. Finding the correct floor, in a fast and efficient manner, in a shopping mall or an unknown university building can save the users' search time and can enable a myriad of Location Based Services in the future. One of the most widely spread techniques for floor estimation in multi- floor buildings is the fingerprinting-based...
This paper presents a novel method for traffic sign detection and visibility evaluation from mobile Light Detection and Ranging (LiDAR) point clouds and the corresponding images. Our algorithm involves two steps. Firstly, a detection algorithm based on high retro-reflectivity of the traffic sign from the MLS point clouds is designed for sign detection in complicated road scenes. To solve the spatial...
Mobile crowdsourcing concept has attracted attentions of researchers, developers and businesses in the last decade. This exact concept has also been used in the area of Intelligent Transportation System (ITS) mainly for collecting and distributing information about the current traffic condition. In this paper, we extend the mobile crowdsourcing concept to be used for an intelligent car park system...
This paper presents an experimental analysis of WCWCL-RSSI (Weight-Compensated Weighted Centroid Localization algorithm based on Received Signal Strength Indicator (RSSI)) in an urban environment. In order to collect the data necessary for localization purposes, measurements were performed in the GSM (Global System for Mobile Communications) network in Belgrade (the central zones of city). The results...
In this paper, we present an alternative to the enhancement of urban microcellular wireless localization based on aggregate received range and signal power along with the proposed partitioned NLOS bias models. Specifically, we preprocess received measurements as validated measurements and propose a state-space system framework which covers validated NLOS biases by Markov-transitioned multiple models...
In this work, spectrum sensing in emerging mobile scenarios is studied. Both the mobile locations of primary-user (PU) and the fading channels will be time-variant, which will arouse remarkable fluctuations in the strength of received signals, making most existing sensing schemes invalid. A novel paradigm, i.e. deep sensing, is designed, which estimates the time-varying fading gains and PU's mobile...
This paper introduces an indoor positioning system which is built with heterogeneous sensors, i.e., inertial sensors and ultra wide band (UWB) ranging modules. It takes a hybrid approach with Inertial Navigation and UWB ranging method to explore their cooperative efforts. Besides, a novel hybrid algorithm for single-anchor positioning and calibration is proposed, which combines real-time inertial...
Consumption of multimedia content is moving from a residential environment to mobile phones. Optimizing Quality of Experience -- smooth, quick, and high quality playback -- is more difficult in this setting, due to the highly dynamic nature of wireless links. A key requirement for achieving this goal is estimating the available bandwidth of mobile devices. Ideally, this should be done quickly and...
This work presents the architecture, modelling, simulation, and physical implementation of a versatile, scalable system for use in common-type waste-bins that can perform and transmit accurate fill-level estimates while consuming minimal power and consisting of low-cost embedded components. The sensing units are based on ultrasonic sensors that provide ranging information which is translated to fill-level...
We developed an information-providing robot for a shopping mall. It moves around and hands over flyers about the mall and when people are interested or approach the robot to obtain some information, it starts the information-providing service. During the information-providing service, it provides directions and recommendations of shops in the mall. The robot is developed to be fully autonomous, but...
This paper proposes a methodology for visual tracking of a dynamic generalized subject within an unknown map, by relying on its perception as a separate entity which can be distinguished spatially and visually from its environment. To this purpose, a 3D-representation of the visible scenery is examined, and the subject is spatially identified by its externally viewed hull via a mesh-connection algorithm...
Pedestrian position tracking is essential in implementing many of the new location based services in cellular networks. The ability for positioning in non-line of sight (NLOS) environments has made cellular network based positioning highly popular. However, the position estimation fine-tuning step in the current cellular network based positioning algorithm is not utilizing the available information...
In this paper, we study the value of software project and product measures in the context of Android mobile apps. In particular, we focus on the effort to develop mobile apps and the number of graphical components in these apps. Estimation models are based on information from requirements specification documents (e.g., Number of actors, number of use cases, and number of classes). We have used a dataset...
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.