scholarly journals Intelligent Cognitive Radio Models for Enhancing Future Radio Astronomy Observations

2016 ◽  
Vol 2016 ◽  
pp. 1-15 ◽  
Author(s):  
Ayodele Abiola Periola ◽  
Olabisi Emmanuel Falowo
Keyword(s):  
Cognitive Radio ◽  
Radio Astronomy ◽  
Data Transmission ◽  
High Performance ◽  
Angular Resolution ◽  
Base Station ◽  
Opportunistic Computing ◽  
Radio Signals ◽  
Performance Computing ◽  
Computing Scheme

Radio astronomy organisations desire to optimise the terrestrial radio astronomy observations by mitigating against interference and enhancing angular resolution. Ground telescopes (GTs) experience interference from intersatellite links (ISLs). Astronomy source radio signals received by GTs are analysed at the high performance computing (HPC) infrastructure. Furthermore, observation limitation conditions prevent GTs from conducting radio astronomy observations all the time, thereby causing low HPC utilisation. This paper proposes mechanisms that protect GTs from ISL interference without permanent prevention of ISL data transmission and enhance angular resolution. The ISL transmits data by taking advantage of similarities in the sequence of observed astronomy sources to increase ISL connection duration. In addition, the paper proposes a mechanism that enhances angular resolution by using reconfigurable earth stations. Furthermore, the paper presents the opportunistic computing scheme (OCS) to enhance HPC utilisation. OCS enables the underutilised HPC to be used to train learning algorithms of a cognitive base station. The performances of the three mechanisms are evaluated. Simulations show that the proposed mechanisms protect GTs from ISL interference, enhance angular resolution, and improve HPC utilisation.

scholarly journals Remote Sensing Using Hybrid Access Cognitive Femtocell Networks in Wireless Communication

2019 ◽  
Vol 8 (9) ◽  
pp. 2196-2199
Keyword(s):  
Cognitive Radio ◽  
Data Transmission ◽  
Cognitive Radio Network ◽  
Radio Networks ◽  
Base Station ◽  
Base Stations ◽  
Maximum Throughput ◽  
Femtocell Networks ◽  
Network Effectiveness ◽  
Network Time

Femto cells are miniature wireless telecommunications base stations that can be placed in different inhibited or industry surroundings moreover as single stand-alone substance or in clusters to afford enhanced cellular coverage inside a building. It is extensively known that cellular coverage, predominantly for data transmission where high quality signal strengths are desirable is not as superior within buildings. By using a miniature domestic base station Femto cell, the cellular routine can be enhanced beside with the promising provision of other services. A cognitive radio network time after time detects handy channels in cellular spectrum, and then frequently varies its transmission or receiving parameters to tolerate further synchronized cellular communications in a given cellular electromagnetic band. Conveying of the free channels among main and minor users, in a specific geographic province at the same time as minimizing infringement amongst all users also known as the Spectrum allotment in cognitive radio networks. In this work MBS, FAP and MUs are presented. Here FAP serves the provision of sub channels and provides power in order to maximize the network effectiveness. Finally achieved maximum throughput for the deployed Macro users (MU) and also the above mentioned problem is solved by dual disintegration method.

scholarly journals Design and Study of Cognitive Network Physical Layer Simulation Platform

2014 ◽  
Vol 2014 ◽  
pp. 1-13
Author(s):  
Yongli An ◽  
Dong Wang ◽  
Yang Xiao
Keyword(s):  
Cognitive Radio ◽  
Data Transmission ◽  
High Performance ◽  
Physical Layer ◽  
Wireless Transmission ◽  
Wireless Data ◽  
Wireless Data Transmission ◽  
Radio Technology ◽  
Simulation Results ◽  
Cognitive Radio Technology

Cognitive radio technology has received wide attention for its ability to sense and use idle frequency. IEEE 802.22 WRAN, the first to follow the standard in cognitive radio technology, is featured by spectrum sensing and wireless data transmission. As far as wireless transmission is concerned, the availability and implementation of a mature and robust physical layer algorithm are essential to high performance. For the physical layer of WRAN using OFDMA technology, this paper proposes a synchronization algorithm and at the same time provides a public platform for the improvement and verification of that new algorithm. The simulation results show that the performance of the platform is highly close to the theoretical value.

scholarly journals Advances and enhancements in the FabrIc for Frontier Experiments project at Fermilab

2019 ◽  
Vol 214 ◽  
pp. 03059
Author(s):  
Kenneth Herner ◽  
Andres Felipe Alba Hernandez ◽  
Shreyas Bhat ◽  
Dennis Box ◽  
Joeseph Boyd ◽  
...  
Keyword(s):  
High Performance ◽  
Identity Management ◽  
Workflow Management ◽  
Management Service ◽  
New Novel ◽  
Monitoring Tools ◽  
Opportunistic Computing ◽  
Identity Management System ◽  
Federated Identity ◽  
Performance Computing

The FabrIc for Frontier Experiments (FIFE) project within the Fermilab Scientific Computing Division is charged with integrating offline computing components into a common computing stack for the non-LHC Fermilab experiments, supporting experiment offline computing, and consulting on new, novel workflows. We will discuss the general FIFE onboarding strategy, the upgrades and enhancements in the FIFE toolset, and plans for the coming year. These enhancements include: expansion of opportunistic computing resources (including GPU and high-performance computing resources) available to experiments; assistance with commissioning computing resources at European sites for individual experiments; StashCache repositories for experiments; enhanced job monitoring tools; and a custom workflow management service. Additionally we have completed the first phase of a Federated Identity Management system to make it easier for FIFE users to access Fermilab computing resources.

Design of an intermediate high voltage EM for 3-D studies of biological material and its integration with a system for remote access

1995 ◽  
Vol 53 ◽  
pp. 66-67 ◽  
Author(s):  
Mark H. Ellisman
Keyword(s):  
High Voltage ◽  
High Performance ◽  
Remote Access ◽  
3 Dimensional ◽  
Voltage Electron ◽  
Remote Operation ◽  
High Voltage Electron Microscope ◽  
La Jolla ◽  
Performance Computing ◽  
Advanced Version

The increased availability of High Performance Computing and Communications (HPCC) offers scientists and students the potential for effective remote interactive use of centralized, specialized, and expensive instrumentation and computers. Examples of instruments capable of remote operation that may be usefully controlled from a distance are increasing. Some in current use include telescopes, networks of remote geophysical sensing devices and more recently, the intermediate high voltage electron microscope developed at the San Diego Microscopy and Imaging Resource (SDMIR) in La Jolla. In this presentation the imaging capabilities of a specially designed JEOL 4000EX IVEM will be described. This instrument was developed mainly to facilitate the extraction of 3-dimensional information from thick sections. In addition, progress will be described on a project now underway to develop a more advanced version of the Telemicroscopy software we previously demonstrated as a tool to for providing remote access to this IVEM (Mercurio et al., 1992; Fan et al., 1992).

Sign in / Sign up

Export Citation Format

Share Document