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Cognitive radio frequency spectrum detection and management technology

Author: LuHaiSheng
Tutor: LiJianDong
School: Xi'an University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Cognitive radio Interference temperature Spectrum sensing Spectrum Management Channel availability
CLC: TN925
Type: Master's thesis
Year: 2011
Downloads: 92
Quote: 1
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Abstract


Technological advances , rapid economic development, more and more closely the links between people , society and even the future of modern society will become increasingly dependent on the development of communication technology , and now the situation of scarce spectrum resources will last a long time , how improve spectrum utilization efficiency will remain a concern. Cognitive radio is made ??in order to improve spectrum utilization techniques , once made ??, it received national attention , with regard to the development of cognitive radio technology and research has become a hot , cognitive radio spectrum sensing , management and distribution of all kinds of new ways , new technologies. In this paper, the field of cognitive radio spectrum sensing technology and management technology research , to explore new interference temperature -based spectrum management and allocation strategy , the use of the learning ability of cognitive radio systems improve spectrum utilization. This article briefly describes the cognitive radio spectrum detection and management techniques , analyzes the current classification of radio- sensing technology as well as the characteristics of various sensing method . Broadly speaking , the interference temperature is also an energy index , interference temperature algorithm is an energy-aware algorithm , this paper discusses the mechanism of interference temperature sensing technology . Current spectrum management and allocation methods are mostly only from the power dimension to consider whether the band is occupied , does not reflect the band in the time dimension characteristics and statistical properties can not support it in the time dimension spectrum resources better choice . This article will some of the time dimension added to the spectral characteristics and patterns of cognitive radio systems, spectrum management module is proposed based on channel availability of spectrum management and allocation algorithms. Based on the results of energy-aware analysis of the monitoring channel interference temperature, size and characteristics of the interference changes over time , through the formula to get sort of channel availability in order to facilitate cognitive radio systems when necessary to switch to the best channel . This article also actual measurement signal analysis, simulation using the measured data and statistics , the use of statistical and computational simulation data , view the spectrum environment , summed spectral characteristics for channel availability algorithm provides data basis .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Radio relay communications,microwave communications
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