Modeling and Simulation of the Propagation Characteristics by Underwater Conduction Current Field

2013 ◽  
Vol 385-386 ◽  
pp. 1582-1585
Author(s):  
Wei Xue ◽  
Jun Wang
Keyword(s):  
Mathematical Model ◽  
Wireless Communication ◽  
Communication System ◽  
Short Distance ◽  
Low Noise ◽  
Underwater Communication ◽  
Propagation Characteristics ◽  
Current Field ◽  
Conduction Current ◽  
Underwater Wireless Communication

Underwater conduction current field communication is a low noise system. It is absolutely to realize the short-distance underwater wireless communication .Compared with underwater acoustic communication, because of the electrical noise underwater is very low, so using underwater current field to realize short-distance underwater wireless communication has a certain advantage. In order to implement the design of conduction current field in underwater communication system better, its necessary to explore and study underwater signal transmission by establishing mathematical model of underwater signal propagation characteristics based on the theory of constant current field and simulating the mathematical model with MATLAB. To fully understand the underwater conduction current field channel characteristics in the actual field environment, we established a simulation model of underwater conduction current field communication channel physical experiment and obtained the amplitude frequency characteristics of the channel based on the external field test data, it laid a solid foundation for the parameter selection of underwater communication system.

Modeling and Simulation of the Propagation Characteristics by Underground Current Field

2013 ◽  
Vol 385-386 ◽  
pp. 1568-1571
Author(s):  
Yi Dong Xu
Keyword(s):  
Mathematical Model ◽  
Signal Transmission ◽  
Signal Propagation ◽  
Underground Mines ◽  
Constant Current ◽  
Propagation Characteristics ◽  
Current Field ◽  
Channel Characteristics ◽  
Underground Communication ◽  
The Mathematical Model

It's one of the effective channels for short-distance wireless communications through stratum in underground mines on emergency communications. The geologic structure is complex in mines, in practical environments. It means there is a considerable difference in conductance property and channel characteristics. In order to realize effective communication through stratum, its necessary to explore and study underground signal transmission by establishing mathematical model of underground signal propagation characteristics based on the theory of constant current field and simulating the mathematical model with MATLAB. We established a simulation model of underground communication channel physics experiments and obtained the amplitude frequency characteristic of the channel, with which we can get the error comparison between theory and test.

A Review on Free Space Optics with Atmospheric and Geometrical Attenuation

2016 ◽  
Vol 37 (4) ◽  
Author(s):  
Suruchi Lath ◽  
Rakesh Goyal ◽  
Rajinder Singh Kaler
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Electromagnetic Interference ◽  
Free Space ◽  
Short Distance ◽  
Free Space Optics ◽  
Narrow Beam ◽  
Energy Beam ◽  
Space Optics ◽  
Optical Cable

AbstractFree space optics (FSO) communication is a short-distance wireless communication system. It can be used where optical fiber cables cannot be implemented. In FSO, the energy beam is accumulated and transmitted through space instead of guiding through an optical cable. FSO communication provides data at a rate of Gbps; it is highly secure because it uses narrow beam to transmit data from transmitter to receiver, uses license-free operation, has no electromagnetic interference and has quick installation. This paper gives an overview of performance of FSO communication with environmental attenuation.

scholarly journals Simple underwater wireless communication system

2011 ◽  
Vol 15 ◽  
pp. 2459-2463 ◽  
Author(s):  
Mengying Jiang ◽  
Jingting Li ◽  
Lin Gao ◽  
Yiwen Wang
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Wireless Communication System ◽  
Underwater Wireless Communication

Design of Infrared Communication System

2014 ◽  
Vol 556-562 ◽  
pp. 4916-4919
Author(s):  
Shuai Kang ◽  
Guang Yi Luo
Keyword(s):  
Remote Control ◽  
Wireless Communication ◽  
Communication System ◽  
Short Distance ◽  
Infrared Communication ◽  
Communication Function ◽  
Remote Controller

Using C51 SCM, a set of simple infrared communication system has been designed through combining with the infrared devices, and infrared wireless communication has been implemented in short distance within the function. It is different with the general infrared remote controller that doesn’t use coding and decoding chip to realize the coding and decoding of the sending and receiving, but through the SCM encoding and decoding procedures to achieve the sending and receiving of infrared signal, so as to realize the communication function of infrared remote control.

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