Design Method of an Ocean Induction Coupling Chain Communication System that Resists the Multipath Effect of a Seawater Channel

2021 ◽  
Vol 20 (1) ◽  
pp. 87-93
Author(s):  
Yu Zheng ◽  
Yanfang Lu ◽  
Chen Fei ◽  
Hongzhi Li
Keyword(s):  
Communication System ◽  
Design Method ◽  
Multipath Effect

scholarly journals Research on Formation of Microsatellite Communication with Genetic Algorithm

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Guoqiang Wu ◽  
Yuguang Bai ◽  
Zhaowei Sun
Keyword(s):  
Spread Spectrum ◽  
Communication System ◽  
Formation Flying ◽  
Design Method ◽  
Ldpc Code ◽  
Spread Spectrum Communication ◽  
Design System ◽  
Generic Algorithm ◽  
Optimizing Design ◽  
Direct Spread

For the formation of three microsatellites which fly in the same orbit and perform three-dimensional solid mapping for terra, this paper proposes an optimizing design method of space circular formation order based on improved generic algorithm and provides an intersatellite direct spread spectrum communication system. The calculating equation of LEO formation flying satellite intersatellite links is guided by the special requirements of formation-flying microsatellite intersatellite links, and the transmitter power is also confirmed throughout the simulation. The method of space circular formation order optimizing design based on improved generic algorithm is given, and it can keep formation order steady for a long time under various absorb impetus. The intersatellite direct spread spectrum communication system is also provided. It can be found that, when the distance is 1 km and the data rate is 1 Mbps, the input wave matches preferably with the output wave. And LDPC code can improve the communication performance. The correct capability of (512, 256) LDPC code is better than (2, 1, 7) convolution code, distinctively. The design system can satisfy the communication requirements of microsatellites. So, the presented method provides a significant theory foundation for formation-flying and intersatellite communication.

scholarly journals The Communication System and its Impacts on Line Current Differential Protection in Distributed Feeder Automation

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1298
Author(s):  
Yilong Duan ◽  
Longfu Luo ◽  
Yong Li ◽  
Yijia Cao
Keyword(s):  
Communication System ◽  
Design Method ◽  
Parameter Determination ◽  
Differential Protection ◽  
Feeder Automation ◽  
Communication Mode ◽  
Line Current ◽  
Current Differential Protection ◽  
On Line ◽  
The Impact

As one of the core technologies of distributed feeder automation (DFA), line current differential protection (LCDP) can locate faults quickly and accurately and have the ability to cope with multi-directional flow. However, LCDP algorithm has high requirements for communication speed, and is sensitive to communication quality. In order to apply the LCDP algorithm to a real project, the communication system and its impacts on LCDP need to be studied in depth. In this paper, the design method of a communication system for LCDP, including communication mode, topology, communication protocol, and synchronization, is analyzed in detail. For better parameter determination, the communication models are investigated, and the impact of time delay, data loss, and jitter on LCDP are discussed. Further, the distribution network based on a real project is built in a cyber-physical co-simulation environment, and the impact of electrical fails and communication fails on LCDP are studied. The results show that the design method and parameters determination method proposed in this paper are effective.

Designing Mobile Application Interaction for School Internal Communication using User-centered Design

2020 ◽  
Vol 7 (1) ◽  
pp. 5-10
Author(s):  
Alivia Dewi Parahita ◽  
Dessi Puji Lestari ◽  
Ginar Santika Niwanputri
Keyword(s):  
Communication System ◽  
Mobile Application ◽  
Design Method ◽  
Internal Communication ◽  
User Centered Design ◽  
Good Communication ◽  
Student Parents ◽  
Teachers And Parents ◽  
User Friendly ◽  
User Centered

In order to fastened up the process, the school internal communication system has been changed from its conventional way using linking book and announcement letter, to messaging groups or mobile applications. This was done to create a good communication between teachers and parents for their children. But parent capability on using mobile application has been causing problems. In this paper, we present the result of our observation for the current school internal communication system problem and made the better solution. To make sure the application design matches with parent’s capability, the user-centered design method is applied. The final result of this study is a high-fidelity prototype of the application for parent side built using Sketch tools. The usability testing has been done to student parents. Based on the test result, this prototype has a good interaction, has a user-friendly interface for parents, and also already fulfill the usability goal and the user experience.

Design of Vehicle Diagnostic Communication Module Based on AUTOSAR Software Architecture

2013 ◽  
Vol 347-350 ◽  
pp. 513-519
Author(s):  
An Yu Cheng ◽  
Shuai Shen ◽  
Tian Zhao
Keyword(s):  
Software Architecture ◽  
Communication System ◽  
Can Bus ◽  
Design Method ◽  
Communication Protocols ◽  
Diagnostic System ◽  
System Communication ◽  
International Standard ◽  
Communication Module ◽  
Autosar Standard

In order to solve the problem that vehicle diagnostic system is of bad uniformity and versatility, which due to the different vehicle diagnostic system communication protocols developed by the different vehicle OEMs according to their own needs, this paper proposes a design method of vehicle CAN bus diagnostic communication module based on AUTOSAR standard. This module follow the AUTOSAR standard and it can be implemented in accordance with the international standard ISO 15765. The results of the test show that when this module is applied to some car dashboard, it can satisfy the needs of the vehicle diagnostic communication system, and it is of good standardization, versatility and portability.

scholarly journals Analisis dan Perancangan Sistem Interactive Voice Response (IVR) Berbasis Openvxi Menggunakan Asterisk Pada Hotel Sahid Jaya

2010 ◽  
Vol 1 (2) ◽  
pp. 723
Author(s):  
Johan Muliadi Kerta ◽  
Wike Apryanto Jufri ◽  
Alexander Aryo Nugroho ◽  
Andreas Kurniawan
Keyword(s):  
Communication System ◽  
Interactive Voice Response ◽  
Design Method ◽  
Voice Recognition ◽  
Deep Understanding ◽  
Support Service ◽  
Needs Analysis ◽  
Service Improvement ◽  
Limited Information ◽  
System Usage

The purpose of this study is to provide a deep understanding of technology of IVR (Interactive Voice Recognition) in OpenVXI based network using Asterisk, that help Sahid Jaya hotel to streamline communication with the guests, improving service and employee effectiveness. The methodology used is analysis which is through surveys, observation and interviews with the company and the design method by designing system from the existing needs analysis. The results obtained from this research is Communication System based in IVR OpenVXI can be applied to existing VoIP network, without disrupting the existing network. Some existing services can be supported with this system usage. Conclusions can be drawn is the use of IVR in the network using VoIP technology is the best solution to overcome the problems and needs of the hospitality which one of these is limited information guest cna get that can provided by non-operators and for support service improvement. 

The Research of HART Sensor System Based on ARM

2014 ◽  
Vol 602-605 ◽  
pp. 2855-2858 ◽  
Author(s):  
Dan Li
Keyword(s):  
Communication System ◽  
Design Method ◽  
Physical Layer ◽  
Application Layer ◽  
Data Link ◽  
Link Layer ◽  
Usb Interface ◽  
Modulation And Demodulation ◽  
Data Link Layer ◽  
Embedded Controller

This paper discusses the design method of economical and practical HART protocol communication system, and describes the research scheme in detail, according to the hierarchy of the system protocols: the physical layer, data link layer and application layer. This scheme includes the design of ARM embedded controller module, modulation and demodulation module and USB interface module and other components. According to the effect of the final product used in the field bus network, it is proved that the operation is stable, accurate, simple and easy.

scholarly journals Efficient Non-Uniform Pilot Design for TDCS

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6880
Author(s):  
Cheng Chang ◽  
Lina Feng ◽  
Hui Zhou ◽  
Zilong Zhao ◽  
Xin Gu
Keyword(s):  
Fading Channels ◽  
Communication System ◽  
Design Method ◽  
Probability Of Detection ◽  
Block Type ◽  
Data Traffic ◽  
Bit Error Ratio ◽  
Pilot Design ◽  
Low Efficiency ◽  
The Time Domain

The Internet of Things (IoT) leads the era of interconnection, where numerous sensors and devices are being introduced and interconnected. To support such an amount of data traffic, wireless communication technologies have to overcome available spectrum shortage and complex fading channels. The transform domain communication system (TDCS) is a cognitive anti-interference communication system with a low probability of detection and dynamic spectrum sensing and accessing. However, the non-continuous and asymmetric spectrum brings new challenges to the traditional TDCS block-type pilot, which uses a series of discrete symbols in the time domain as pilots. Low efficiency and poor adaptability in fast-varying channels are the main drawbacks for the block-type pilot in TDCS. In this study, a frequency domain non-uniform pilot design method was proposed with intersecting, skewing, and edging of three typical non-uniform pilots. Some numerical examples are also presented with multipath model COST207RAx4 to verify the proposed methods in the bit error ratio and the mean square error. Compared with traditional block-type pilot, the proposed method can adapt to the fast-varying channels, as well as the non-continuous and asymmetric spectrum conditions with much higher efficiency.

Optimization Design of the CRC Check for RFID Communication System

2014 ◽  
Vol 926-930 ◽  
pp. 1979-1983
Author(s):  
Wen Wen Zhang ◽  
Wei Ping Jing ◽  
Bin Jiang
Keyword(s):  
Data Streams ◽  
Communication System ◽  
Optimization Design ◽  
Design Method ◽  
Hardware Description Language ◽  
Clock Frequency ◽  
Description Language ◽  
Cyclic Redundancy Check ◽  
Hardware Description ◽  
Hardware Circuit

The method of cyclic redundancy check (CRC) was been used in the process of RFID communication adopts to ensure that the data was transfer correctly. The principle of CRC was been introduced. The design method about 16-bit CRC code was been gotten through the hardware circuit and hardware description language. And it was compatible with the serial and parallel two kinds of data streams. At the same time it was been verified correctly in RFID communication system. And the results are verified in the specified clock frequency in xc2vp4-6fg256 device in FPGA Xilinx kit using VI-IDL in RTL level. It with strong portability could extend to all CRC system.

Analyses of Optical Emitter Performance in Terehertz Wireless Communication System

2013 ◽  
Vol 760-762 ◽  
pp. 227-231
Author(s):  
Ming Liang Li ◽  
Cong Wang
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Modular Design ◽  
Design Method ◽  
Core Component ◽  
Wireless Communication System ◽  
The Core ◽  
Information Safety ◽  
The Relationship ◽  
Transmission Speed

To resolve the limitation of information safety and transmission speed in existing communication system, it applied the modular design method to design optical-electric combined THz wireless communication system framework, and determined 125GHz carrier frequency. Aiming at the core component optical emitter uni-traveling-carrier photodiode (UTC-PD) in THz wireless communication system, it analysed the relationship between output power, bandwidth and input signal types, and determined the emitter bandwidth by experiment. The result shows that the transmission speed in the system is able to reach 3.0Gbps when BER is less than 10-10.

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