The Design of Wireless Broadband Communication System Based on OFDMA

2012 ◽  
Vol 241-244 ◽  
pp. 2275-2278
Author(s):  
Zuo Xue Liu ◽  
Jian Mei Dai ◽  
Bo Liu
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
System Structure ◽  
Antenna Gain ◽  
Broadband Communication ◽  
Allocation Model ◽  
Receiving Antenna ◽  
Wireless Broadband ◽  
Transmitting Antenna ◽  
Wired Communication

A Wireless Broadband Communication System has been made up based on OFDMA and AMC technologies. The system structure and working pattern is introduced, the OFDMA allocation model, the MIMO and AMC scheme are present, and the parameter such as transmitting power, receiver sensitivity, transmitting antenna gain and receiving antenna gain are designed. The system enables high quality wireless broadband communication. As a supplement with wired communication systems, the system could fulfill the requirement of recovery local communication rapidly when some accidents take place.

Operation of a Discrete Communication System

2021 ◽  
pp. 172-214
Author(s):  
Stevan Berber
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
Likelihood Function ◽  
System Structure ◽  
Mathematical Expressions ◽  
System P ◽  
Special Cases ◽  
Shift Keying ◽  
Correlation Receiver ◽  
Discrete Counterpart

In this chapter, based on definitions of signal synthesizers and analysers, a general and generic scheme of a discrete communication system is developed in order to deduce practical systems as its special cases. The synthesizer is transferred into a discrete transmitter, and the analyser is used as a correlation receiver followed by an optimum detector. The system structure is presented in terms of mathematical operators and supported by exact mathematical expressions based on the theory of discrete-time stochastic processes. The likelihood function is derived, and the maximum likelihood rule is applied to specify the decision process and construct the optimum detector. A multilevel system and a quadrature phase-shift keying system are deduced as special cases, and the bit error probability expression is derived. For the sake of continuity and completeness in presenting communication systems theory, a generic digital communication system is developed and related to its discrete counterpart.

scholarly journals Smart Home: An Empirical Analysis of Communication Technological Challenges

2020 ◽  
Vol 5 (5) ◽  
pp. 571-575
Author(s):  
Md. Razu Ahmed ◽  
Mohammad Osiur Rahman ◽  
Md. Jiabul Hoque
Keyword(s):  
Wireless Communication ◽  
Communication System ◽  
Communication Systems ◽  
Smart Home ◽  
Careful Analysis ◽  
Data Rate ◽  
Wireless Communication System ◽  
Wired Communication ◽  
Home Technology ◽  
Smart Home Technology

Smart home is a prime research interest among researchers around the globe due to the fact that it offers ample features to make people’s life effortless and efficient. People can lead their life smartly through the use of smart home technology [17]. There are numerous communication systems in both wired and wireless media exist that are used in smart home technology. However, not a single communication system itself can satisfy all the demands of secure, comfort and intelligent smart home system. Wireless communication is flexible, requires negligible number of instruments, cheap and easy to install but the key concerning issue for wireless communication system in smart home technology is the slow data rate. In contrast, wired communication provides better performance through the provision of higher data rate and uninterrupted connectivity; however, consumers have to pay substantial amount of payment for smart home services [3]. Therefore, it is essential for researchers to analyze both wired and wireless communication system in terms of data rate and area of coverage in order to find out the right communication system for right feature of smart home system. In this paper, authors reviewed and analyzed both wired and wireless communication methods that are commonly used in smart home technology. It can be seen after careful analysis that for majority of the services of smart home system can get better result through the use of wireless communication system even though wired communication system offers better data rate and greater coverage.

Unified Hybrid Free Space Optical/Radio Frequency Communication System Based on Microwave Photonics

2013 ◽  
Vol 765-767 ◽  
pp. 2706-2709
Author(s):  
Ke Deng ◽  
Bing Zhong Wang ◽  
Zhou Shi Yao
Keyword(s):  
Radio Frequency ◽  
Communication System ◽  
Free Space ◽  
Communication Systems ◽  
Microwave Photonics ◽  
System Structure ◽  
Free Space Optical ◽  
Communication Mode ◽  
Communication Subsystems ◽  
Communication System Design

Hybrid free space optical/radio frequency communication systems improve reliability of links. However, independent communication subsystems increase the system complexity, weight, size, and power consumption. Based on microwave photonics, a unified hybrid free space optical/radio frequency communication system design is proposed. The communication subsystems share antenna, modulator, and demodulator to simplify system structure. Operating principle is expounded by theoretical reference, and 3dB theoretical loss is found in millimeter-wave communication mode.

Communication Systems for Factory Automation: A Design Approach Based on MMS and WSs Technologies

2010 ◽  
Vol 102-104 ◽  
pp. 936-940
Author(s):  
Bing Hai Zhou ◽  
Ke Lin Xu
Keyword(s):  
Control Systems ◽  
Communication System ◽  
Communication Systems ◽  
Manufacturing Systems ◽  
System Structure ◽  
Design Approach ◽  
Direct Result ◽  
Automated Manufacturing Systems ◽  
Development Environment ◽  
Factory Automation

Factory automation (FA) is a direct result of the underlying communication systems. To integrate the FA information and make FA control systems with flexibility and interoperability in automated manufacturing systems, the manufacturing message specification (MMS), Web services’ (WSs) technologies and typical FA systems are analyzed. A new design approach of the communication system structure is presented for FA systems in this paper. A prototype of FA control systems is used for evaluating performance of the communication system structure in C++ Visual Studio.NET and Java Borland Builder 9.0 development environment. The experimental results show that the proposed design approach is valid and promising.

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