As scientific communities become increasingly complex and interdisciplinary, implementing policies that foster collective creativity for science-based innovation emerges as a critical issue. In this paper, we investigate the impact of socio-communication strategies on innovation capacity based on experiments using a general-purpose model that aims to study dynamic processes of collective creativity in scientific communities. Experimental results…
Tags: OMNeT++ Manet
A Compact Readout Electronics for the Ground Station of a Quantum Communication Satellite
Free-space quantum key distribution (QKD) is being developed for achieving unconditional securecommunication over ultra-long distance, which requires higher electronics performance, such as higher time measurement precision, higher data-transfer rate, and higher system integration density. As part of the ground station of the Quantum Science Satellite that will be launched in 2016, we specifically designed a compact…
Architecting space communication networks under mission demand uncertainty
NASAs Space Network has been a successful program that has provided reliable communication and navigation services for three decades. As the third generation of satellites is being launched, alternatives to the current architecture of the system are being studied in order to improve the performance of the system, reduce its costs and facilitate its integration with the…
A federated simulation toolkit for electric power grid and communication network co-simulation
This paper introduces a federated simulation toolkit (FSKIT) that couples continuous time and discrete event simula- tions (DES) to perform the co-simulation of electric power grids and communicationnetworks. A High Performance Computing (HPC) oriented power system dynamic simulator, GridDyn, was used for the electric power grid simulation. GridDyn is coupled to the open-source network simulator, ns-3,…
DYWAMIT: Asynchronous Wideband Dynamic Spectrum Sensing and Access System
Dynamic spectrum access (DSA) is a promising solution for enhancing the utilization efficiency of spectrum resources. In DSA, spectrum sensing is crucial and cooperative spectrum sensing has been confirmed as a promising technology that can combat the wireless channel fading problem. Most current works have assumed that the secondary users (SUs) are synchronous with the…
crSimulator: A discrete simulation model for cognitive radio ad hoc networks in OMNeT ++
Cognitive Radio is an exciting new technology for efficient use of radio spectrum. Research oncognitive radio has for a large part, focused on physical layer issues such as robust spectrum sensing and radio environment characterization. The networking of cognitive radio nodes is equally important however as new protocols need to be developed to cope with physical layer dynamics. The lack of a widely used and open source simulation…
Powering the IoT: Storage-less and converter-less energy harvesting
Wide spread of Internet of Things (IoTs) still have huddles in cost and maintenance. Energy harvesting is a promising option to mitigate battery replacement, but the current energy harvesting methods still rely on batteries or equivalent and power converters for the maximum power point tracking (MPPT). Unfortunately, batteries are subject to wear and tear, which…
Signal Design for Context Aware Distributed Radar Sensing Networks Based on Wavelets
In the field of radar sensing, a paradigm shift is taking place from the traditional radar system to distributed sensing/radar networks. Comparing with the single radar system distributed radar networkshave a superior performance in detection and estimation of parameters of target. They also enhance the imaging and classification performance of sensing systems. As in distributed radar networks several radars…
An Alternative to Decoding Interference or Treating Interference as Gaussian Noise
This paper addresses the following question regarding Gaussian networks: Is there an alternative to decoding interference or treating interference as Gaussian noise? To state our result, we study a decentralized network of one primary user (PU) and one secondary user (SU) modeled by a two-user Gaussian interference channel. In one scenario, the primary transmitter is constellation-based and PUs…
A multi-channel spectrum sensing scheme with filter bank realization for LTE signals
In cognitive ratio (CR), spectrum sensing is a crucial technique aiming at exploiting spectrum white spaces. This sensing task is more difficult for multiple channels in wide bands. In this paper, we investigate spectrum sensing tasks for long-term evolution (LTE) networks in large frequency-bands. We propose an effective spectrum sensing scheme to detect LTE signals and classify the cell-identities…