A Control System in Satellite Navigation and Communication Terminal

2014 ◽  
Vol 513-517 ◽  
pp. 2888-2892
Author(s):  
Zheng Qun Hu ◽  
Guo Xiang Ai ◽  
Li Rong Zhang ◽  
Chao Hu
Keyword(s):  
Control System ◽  
Communication System ◽  
Satellite Communication ◽  
Data Communication ◽  
Satellite Navigation ◽  
Quality Data ◽  
Communication Interface ◽  
Voice Communication ◽  
Good Communication ◽  
Set Up

For the needs of a satellite navigation and communication system, we design and implement a terminal control system in the integration of navigation and communication system in this paper. The control system consists of CPU controller, GPS positioning module, smart finding and alignment satellite module, transmit/receive baseband, RF module, voice module and other functional modules, which has navigation and communication function. Satellite communication includes voice communication and data communication. The voice communication interface is operated conveniently, which using I/Q quadrature BPSK modulation to set up satellite links easily. It has a good communication quality. Data communication using the bidirectional answer mode to make success rate close to 100% in data upward to the communication center station, which is well to meet the needs in data upward.

Research on the Character of a Synchronous Control System with Wireless Data Communication

2010 ◽  
Vol 455 ◽  
pp. 206-210
Author(s):  
Jun Li Liu ◽  
Yan Yan Yan ◽  
G.Q. He
Keyword(s):  
Control System ◽  
Time Delay ◽  
Data Transmission ◽  
Data Communication ◽  
Control Model ◽  
Data Loss ◽  
Wireless Data ◽  
Synchronous Control ◽  
Wireless Data Transmission ◽  
Set Up

It discusses the reasons of the data transmission time delay and packets loss based on the theory of net data transmission. Aimed to the question of the time delay of data transmission and packets loss, the control system models are set up to analyze their influence to the performance of the control system. Based on the synchronous control model analysis with wireless data transmission, a method to control the system is reached with the state prediction when the communication error or data loss appears. It can control constantly when communication errors appear, and also it can get the most error period by numerical analysis.

The Design of STM32 Embedded Data Gathering Control System Based on GPRS Network

2014 ◽  
Vol 977 ◽  
pp. 326-329
Author(s):  
Shi Wei Lin
Keyword(s):  
Control System ◽  
Communication System ◽  
Data Center ◽  
Data Gathering ◽  
Data Communication ◽  
The Internet ◽  
Client Server ◽  
Network Transmission ◽  
Remote Data

In this paper, the remote data communication system based on GPRS composed of the data center and transmission terminal, which are connected through the Internet and GPRS network.. Taking the client/server model and the connection serve as a whole is to carry out network transmission.

Development of a Web-based picture archiving and communication system using satellite data communication

2000 ◽  
Vol 6 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Seoncheol Hwang ◽  
Jeongwhan Lee ◽  
Heejoung Kim ◽  
Myoungho Lee
Keyword(s):  
Satellite Data ◽  
Communication System ◽  
Satellite Communication ◽  
Data Communication ◽  
Image Transmission ◽  
Communication Link ◽  
Web Based ◽  
Remote Hospital ◽  
Picture Archiving ◽  
Picture Archiving And Communication

Using the JAVA language we have developed a Web-based picture archiving and communication system PACS which allows a remote hospital to access medical images. An asymmetric satellite data communication system ASDCS provided a receive-only link for data delivery and a conventional terrestrial link which could be the conventional telephone network allowed data transmission. The satellite communication link was 10- 30 times faster than the conventional terrestrial link. To increase image transmission speeds over the Internet connection, JPEG and wavelet compression methods were used. The resulting images were evaluated quantitatively by measuring the peak signal:noise ratio and qualitatively by radiologists. Compression ratios of 10:1 or less were deemed acceptable for diagnostic purposes. The system appears to be suitable for teleradiology and telemedicine.

scholarly journals LTE-U based Train to Train Communication System in CBTC: System Desin and Reliability Analysis

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Hao Liang ◽  
Hongli Zhao ◽  
Shuo Wang ◽  
Yong Zhang
Keyword(s):  
Control System ◽  
Communication System ◽  
Evaluation Method ◽  
Operating Cost ◽  
Data Communication ◽  
Stochastic Petri Nets ◽  
Critical Signal ◽  
Efficient Operation ◽  
Train Control ◽  
Train Control System

Communication-Based Train Control (CBTC) system is a critical signal system to ensure rail transit’s safe operation. Compared with the train-ground CBTC system, the train control system based on train-to-train (T2T) communication has the advantages of fast response speed, simple structure, and low operating cost. As the core part of the train control system based on T2T communication, the reliability of the data communication system (DCS) is of great significance to ensure the train’s safe and efficient operation. According to the T2T communication system requirements, this paper adopts Long-Term Evolution-Unlicensed (LTE-U) technology to design the DCS structure and establishes the reliability model of the communication system based on Deterministic and Stochastic Petri Nets (DSPN). Based on testing the real line’s communication performance parameters, the DSPN model is simulated and solved by π -tool, and the reliability index of the system is obtained. The research results show that the LTE-U-based T2T communication system designed in this paper meets the train control system’s needs for communication transmission. This paper’s reliability evaluation method can complete the reliability modeling of train control DCS based on T2T communication. The research in this paper will provide a strong practical and theoretical basis for the design and optimization of train control DCS based on T2T communication.

A Novel Satellite Telephone Communication System Based on SIGSO Satellite

2013 ◽  
Vol 446-447 ◽  
pp. 1642-1646
Author(s):  
Jun Xia Cui ◽  
Hu Li Shi
Keyword(s):  
Communication Network ◽  
Mobile Communication ◽  
Communication System ◽  
Speech Coding ◽  
Satellite Communication ◽  
Voice Communication ◽  
Public Network ◽  
Mobile Communication Network ◽  
Telephone System ◽  
Motion Characteristics

In recent years, the coverage of terrestrial mobile communication network is more and more extensive, and the mobile phones have occupied the vast majority of voice communications in almost all countries. However, satellite voice communication system is still playing an irreplaceable role on the vast sea and the land area which are not covered by the land mobile communication network. The motion characteristics of the SIGSO satellites and its new demands and characteristics to the system are analyzed, and a novel very low rate satellite telephone system is put forward. The speech coding algorithms are studied, and a suitable speech coding algorithm and coding rate of 600bps is selected for the SIGSO satellite communication system. The overall design of the satellite voice communication network is given, including link budgets, network structure, system components, system signaling and so on. This satellite telephone system can get access to the PSTN network through ground gateway to achieve interoperability with the public network.

Design, Development and Practical Realization of a VLC Supportive Indoor Lighting System

2020 ◽  
pp. 87-97
Author(s):  
Sourish Chatterjee ◽  
Biswanath Roy
Keyword(s):  
Data Communication ◽  
Cost Effective ◽  
Ambient Light ◽  
Lighting System ◽  
Design Development ◽  
Led Driver ◽  
Communication Performance ◽  
Good Communication ◽  
Simulink Model ◽  
Light Interference

In an office space, an LED-based lighting system allows you to perform the function of a data transmitter. This article discusses the cost-effective design and development of a data-enabled LED driver that can transmit data along with its receiving part. In addition, this paper clearly outlines the application of the proposed VLC system in an office environment where ambient light interference is a severe issue of concern. The result shows satisfactory lighting characteristics in general for this area in terms of average horizontal illuminance and illuminance uniformity. At the same time, to evaluate real-time and static communication performance, Arduino interfaced MATLAB Simulink model is developed, which shows good communication performance in terms of BER (10–7) even in presence of ambient light noise with 6 dB signal to interference plus noise ratio. Our designed system is also flexible to work as a standalone lighting system, whenever data communication is not required.

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