Hybrid terrestrial/satellite networks and interoperability among public safety communication systems

2005 ◽  
Author(s):  
Brian M. Deobald
Keyword(s):  
Communication Systems ◽  
Public Safety ◽  
Satellite Networks ◽  
Safety Communication

Design and Analysis of a Reliable Communication System in Nuclear Safety Instrument & Control System

2021 ◽  
Author(s):  
Le Li ◽  
Zhihui Zhang ◽  
Chao Gao ◽  
Fei Zhou ◽  
Guangqiang Ma
Keyword(s):  
Communication Networks ◽  
Communication System ◽  
Communication Systems ◽  
Nuclear Power ◽  
Data Exchange ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Nuclear Safety ◽  
Safety Communication ◽  
Digital Control Systems

Abstract With the development of digital instrument and control technology for nuclear power plants in recent decades, communication networks have become an important part of safety digital control systems, which takes charge in data exchange between the various sub-systems, and extremely impact on the reliability and safety of the entire I&C system. Traditional communication systems where some special features, such as reliability, safety, real-time, certainty, and independence are not strictly required are various illustrated. However, how to implement a communication system in a safety I&C system is rarely stated in current research. In this research, a reliable safety communication system applied in nuclear power plants is designed and analyzed. The five key characteristics of nuclear safety communication networks are explained, followed by explanation of how to achieve these characteristics. The analysis and verification of the designed system are also stated in this paper, which contributes to proving that the designed nuclear safety communication system could applied in the nuclear power plants.

scholarly journals Modeling Public Safety Communication Scenarios: School Shooting Incident

2021 ◽  
Author(s):  
Richard Rouil ◽  
Antonio Izquierdo Manzanares ◽  
Chunmei Liu ◽  
Wesley Garey
Keyword(s):  
Public Safety ◽  
School Shooting ◽  
Safety Communication

scholarly journals Introduction to satellite education on quality management

2019 ◽  
Vol 2 (1) ◽  
pp. 1-4
Author(s):  
Paras Jain ◽  
Rishu Agarwal ◽  
Vijya Laxmi Raikwar ◽  
Jaya Khare
Keyword(s):  
Staff Development ◽  
Rural Areas ◽  
Role Models ◽  
Communication Systems ◽  
Satellite Communication ◽  
Educational Opportunity ◽  
Satellite Networks ◽  
Teacher Shortages ◽  
Teacher Student ◽  
Service Training

Education provides access to subject matter experts, interaction with career role models. It provides interaction with students in other schools, increases access to information instructional resources, offers opportunities for staff development/in-service training, and increase school community linkages. The rapid growth of satellite networks has generated interest by many state officials in statewide satellite networks. Rural areas are showing great interest in interactive satellite instruction as a way to resolve teacher shortages and meet rigorous graduation requirements. Televised classes permitting live teacher-student interaction via satellite communication systems, and regular telephone lines provide equity increasing quality of educational opportunity.

scholarly journals Cognitive Interference Cancellation with Digital Channelizer for Satellite Communication

Sensors ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 355 ◽  
Author(s):  
Byounghak Kim ◽  
Heejung Yu ◽  
Song Noh
Keyword(s):  
Interference Cancellation ◽  
Communication Systems ◽  
Satellite Communication ◽  
Energy Detection ◽  
Detection Performance ◽  
Satellite Networks ◽  
Cognitive Interference ◽  
Research Attention ◽  
Cell Coverage ◽  
Detection Probabilities

The concept of Internet of Things (IoT) has attracted much research attention for the realization of a smart society. However, the radio transmission coverage of the existing IoT solutions is not enough to connect lots of devices deployed over wide areas. Therefore, satellite networks have been considered as one of the most attractive solutions to wide cell coverage of IoT, i.e., global-scaled IoT. In satellite communication, a digital channelizer is one of the most significant parts that support multiple transponders. Owing to their wide coverage, satellite communication systems are more vulnerable to interference than other types of wireless communication systems. In this study, a cognitive interference cancellation using the inherent properties of a digital channelizer is considered. The proposed method detects a subchannel corrupted by interference and omits it. A simple energy detection method and a modified version are proposed for detection of interference. In the modified (i.e., improved) method, the number of required signal blocks to achieve the target detection performance can be reduced, i.e., the detection performance is improved with the same number of blocks, by exploiting the property of the fast Fourier transform (FFT) algorithm. Detection performance such as false alarm and detection probabilities are analyzed, and the validity of the analysis is verified with numerical results. It is also shown that an interference lower than a certain level in the proposed approach does not need to be cancelled.

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