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Performance-throughput for Spectrum Sensing Based on Relay Cooperation

Author: ZhengXueYun
Tutor: ZhuJinKang
School: University of Science and Technology of China
Course: Communication and Information System
Keywords: Cognitive radio systems Spectrum detection Cooperative detection Probability of detection Probability of false alarm Relay Cooperative Throughput
CLC: TN925
Type: Master's thesis
Year: 2010
Downloads: 108
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Abstract


In recent years, cognitive radio (CR: Cognitive Radio) technology as an effective solution to the spectrum and spectrum utilization is not high tension between the contradictory way, more and more people's attention. Cognitive radio technology in cognitive users (also known as CR users) on the surrounding environment, wireless spectrum accurate and fast detection, ie, spectrum sensing is to improve the spectrum utilization, protection of authorized users from interference is an important prerequisite and core technology. Two important measure of spectrum sensing parameters are: the probability of detection and false alarm probability. The higher the probability of detection, the better the perceived performance; false alarm probability is lower, the greater the chance of cognitive user access spectrum, the greater the available throughput. Based on this background, combined with relay collaborative research in cognitive radio systems and accessible perception tradeoff between throughput. In this thesis, the development of cognitive radio system status are reviewed. Analysis of the various spectrum sensing cognitive radio technology, mainly from the perspective of the receiving end of the spectrum sensing method and describes this research themes, namely spectrum sensing performance and system throughput relations, noting that the study of the problem Spectrum sensing performance of the important aspects. Summarizes the basic principles of cooperative spectrum sensing and integration guidelines and gives relaying cooperative diversity detect simple analysis. The paper then gives the individual user's perception of cognitive performance and throughput tradeoff analysis and simulation, and based on this study, the collaboration of the two relay cognitive user perception of cognitive radio network performance and throughput trade-off relationship. Based on a relay between two cognitive user collaboration, namely through the relay user forwards the signal to achieve cognitive authorized user collaboration between users. Simulation results show that the method detection probability is constant, can effectively reduce the cognitive user perceived probability of false alarm of authorized users to shorten the \The maximum volume and cognitive system throughput. Finally, analysis of the relay-based multi-user collaborative sensing cognitive radio network performance and throughput tradeoff. Multiple cognitive users are grouped according to a group of two, were used to relay collaborative approach to study the cognitive system of multi-user perceived performance and throughput. Collaborative approach proved relaying background in multi-user awareness is also achievable simulation in a multi-user awareness systems, relay collaborative approach can guarantee not to interfere with authorized users at the same time, effectively improve the \informs the user throughput.

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