Tag Archive: 'opnet guru'

Spectral Efficiency and Throughput Enhancement by Full-Duplex D2D Communication in Mobile Clouds

In this paper we consider downlink resource sharing for full-duplex (FD) device-to-device (D2D) communications underlying cellular network. We aim to maximize the system throughput and increase the spectral efficiency in wireless communications by integrating the concepts of D2D and FD communications. We formulate a throughput maximization problem and then based on its constraints we analytically derive […]

An Oscilloscope Correction Method for Vector-Corrected RF Measurements

The transfer characteristics of the RF front-end circuitry of a real-time oscilloscope (RTO) are not only frequency dependent and nonlinear with signal amplitude but also dependent on the voltage range setting of the oscilloscope. A correction table in the frequency domain is proposed to account for the additional gain and delay introduced when switching between […]

Industrial application development exploiting IoT vision and model driven programming

In recent years there has been a huge discussion about the IoT (Internet of Things) concept, and even more about IoT within industrial environment. The real IoT is a network of devices with local intelligence (sensors, lights, gas pumps, HVAC systems), which shares access & control mechanisms to push and pull status and command information from the networked world. […]

An enhanced router based queuing policy providing better fairness to real-time data transfers in Internet

Forwarding and delivery in IP based internet is a best effort service. IP being a connectionless forwarding mechanism, it may drop the packets at the time of congestion. This may affect the services in internet as it is not able to deliver the packet with sufficient Quality of service (QOS). The reliability mechanism adopted by […]

Innovative propagation mechanism for inter-chip and intra-chip communication

SoC (System on chip) technology has rapidly developed in recent years, stimulating emerging research areas such as investigating the efficacy of wireless network interconnection within a single chip or between multiple chips. However the design of the on-chip antenna faces the challenge of obtaining high radiation efficiency and transmission gain due to conductive loss of the silicon […]

A hardware-in-the-loop simulator for demand response energy management in industrial facilities

Demand response (DR) used in smart grid (SG) can enhance the reliability of the power system as well as reduce the energy costs for customers. One of the major consumers of electrical energy is industry. In this study, we develop a hardware-in-the-loop (HIL) simulator to demonstrate how to practically implement DR in industrial facilities. The […]

A new hybrid traffic generation model for Tactical Internet reliability test

Tactical Internet (TI) is the communication infrastructure of tactical level maneuver warfare forces; its reliability directly affects the military combat. Therefore, in the TI reliability test, how to generate the appropriate network traffic and get the most accurate evaluation results should be an important part of the TI reliability test research. This paper analyzes the […]

Wi-Fi-based hierarchical Wireless Networked Control Systems

This paper proposes a novel architecture for a hierarchical Wireless Networked Control System (WNCS). It consists of three cascaded workcells each containing 30 sensors, 30 actuators and one controller. The wireless communication protocol used is IEEE 802.11g with multicasting. The hierarchy of the system is such that the lowest level is that of the sensors […]

Successful realization of Non-Foster circuits for wide-band antenna applications

Non-Foster circuits (NFCs) are promising for numerous microwave and antenna applications because they are not limited by the gain-bandwidth product. Although NFCs can be very useful in many applications, successful realization of these circuits is difficult because they suffer from several issues, including losses, noise, and instability. As a consequence, an accurate and efficient design […]

A new bandwidth-efficient multicast routing scheme for mobile Ad hoc Networks

This paper proposes an improved scheme based on Bandwidth-Efficient Multicast Routing (BEMR) for Mobile Ad Hoc Networks (MANET) to further reduce the control overhead whilst increasing the overall bandwidth efficiency. After carefully studying the original BEMR design, two new approaches are proposed to enhance the BEMR performance. One is in the tree set-up phase, while […]