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In this paper, we propose a cooperative spectrum sensing scheme in which the secondary users can exchange their sensing data by using the underlay approach in the cognitive radio network. The bandwidth issue in soft combination for cooperative spectrum sensing is considered. We further invest-tigate the interference probability between secondary network and primary network.
Many radar applications for sensing space plasma necessitate the use of coded pulses for good range accuracy and sensitivity under peak power constraints. When codes are used, the matched filter is often applied during processing to maximize the signal-to-noise ratio (SNR) for detection and analysis. In the case of moving targets with unknown velocity (e.g. meteor head echoes) or the general case...
To meet the demands of the joint operation under the information conditions, the operational effectiveness of a combat network of weapon system-of-systems has become a hot research. In this study, an operational effectiveness evaluation method based on operation loop is put forward. First, we introduce the concepts of operation loop and discuss the weapon system-of-systems combat networks model. Then,...
In this paper, we characterize the architecture of digital services that are enabled by embedded technology. Digitalization with embedded technology in physical products has become a common phenomenon. In spite of growing instance of such digitalization, little is known about the architectural characteristics of digital services enabled by embedded technology. Based on a research on vehicular remote...
Organizing data that can come from anywhere in the complex business process in a variety of types is a challenging task. To tackle the challenge, we introduce the concepts of virtual sensors and process events. In addition, a visual interface is presented in this paper to aid deploying the virtual sensors and analyzing process events information. The virtual sensors permit collection from the streams...
We demonstrate a method, permitting the observation of dielectric loading of hydrocarbons into a porous coordination polymer nanocrystal (PCP), by spatially resolving the phase difference between the near-field responses of two terahertz resonators.
Cheap and practical infra red (IR) sources are incandescent sources such as globar or hot membranes. These sources are broadband, omnidirectional, have a low efficiency and cannot be modulated faster than 100 Hz. In this paper, we show how it is possible to overcome all these limitations by taking advantage of surface waves.
Spectrum sensing is an essential feature of Cognitive Radio (CR) that enables the nodes to determine the availability of the spectrum to be exploited. Recent work on CR propose localization of Primary Users (PUs) which enables CR nodes, also called Secondary Users (SUs), to utilize gray spectrum (occupied by PUs) by limiting their transmission power and hence not causing interference to PUs. Techniques...
CMOS imagers are complex systems whose design requires quite different pieces of expertise, namely: pixels, analog signal processing, pixel readout and analog-to-digital conversion, digital signal processing, output drivers, etc. Confronting the design of new imagers require hence the concourse of multidisciplinary teams. However, because correct operation calls for the close interconnection among...
Internet of Things (IoT) applications will be based on the interactions between smart objects. In many applications such interactions are possible (or meaningful) when objects are close to each others, i.e., there is a co-presence. Unfortunately, to date there are no data traces providing information about the copresence of smart objects. Indeed, several mobility traces reporting humans' movements...
The study aims to report the results of experimental system and curriculum design by utilizing PC, Kinect sensing device, interface circuit, embedded controller, and actuating device. Through this system and curriculum, students learned the skills of PC control programming, signal transmission, interface circuit design, and embedded controller programming, their proficiency in system integration was...
In this paper, the underwater Acoustic Sensor Network for static and mobile nodes are reviewed, where acoustic links can established between two or more nodes for communication or data transmission. Acoustic links were used in place of RF signal for underwater communication, since RF signal attenuate rapidly under the water and optical communication is only suitable for short distance communication...
To deal with the existence of malicious secondary users bring damage to the performance of cooperative spectrum sensing, a trust game model named FRTrust is proposed. In FRTrust, the reputation status is used to describe the performance of a secondary user in cooperative spectrum sensing process. It encourages secondary users to choose positive and honest behavior strategies for greater and long term...
Intelligent Traffic light systems primarily focus on solving the traffic congestion problems with ever evolving algorithms. The solutions cater only to the problems based on traffic flow and density and does not include if an accident is causing the delay. There are various solutions that exist for detecting the accidents close to traffic control systems but most lack the capability to take the necessary...
An executive system of tomato harvesting robot was constructed by integrating self-designed end-effector with commercial Motoman manipulator. To communicate the enclosed controller JRC of manipulator with PMAC controller of end-effector, statements in programs of both PComm32PRO and WINCAPS were used to set digital input/output by each other through two relays and certain condition judging statements...
Cognitive radio (CR) has been proposed as a promising solution to overcome the spectrum scarcity problem. Many works have been reported to improve spectrum sensing performance of secondary users (SUs) as an essential step to design a CR network (CRN). Spectrum sensing optimization is able to improve spectral efficiency and protect a primary user (PU) from interference. Among different detection techniques,...
One of the current challenges in the development of robot navigation systems is making them capable of intelligent and suitable responses to the complex and changing environments. The navigation of the robot's behavior becomes very challenging when it is under complex and dynamic environments. Autonomous navigation systems for mobile robots have been well developed for a wide range of planar ground-based...
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