Description: A Survey of Spectrum Sensing Algorithms The spectrum sensing problem has gained new aspects with cognitive radio and opportunistic spectrum access concepts. It is one of the most challenging issues in cognitive radio systems. In this paper, a survey of spectrum sensing methodologies for cognitive radio is presented. Various aspects of spectrum sensing problem are studied from a cognitive radio perspective and multi-dimensional spectrum sensing concept is introduced. Challenges associated with spectrum sensing are given and enabling spectrum sensing methods are reviewed. The paper explains the cooperative sensing concept and its various forms. External sensing algorithms and other alternative sensing methods are discussed. Furthermore, statistical modeling of network traffic and utilization of these models for prediction of primary user behavior is studied. Finally, sensing features of some current wireless standards are given. Platform: |
Size: 453502 |
Author:chenpeng3361 |
Hits:
Description: Spectrum sensing is a key technology in Cognitive
Radio (CR). It provides the CR system with available vacant
channels list by sensing the spectrum environment over a wide
frequency band. However, local sensing by single node will be
compromised if the sensing node experiences shadowing or
fading effect. Cooperative spectrum sensing is derived to solve
this problem Platform: |
Size: 337920 |
Author:phong |
Hits:
Description: Cognitive Radios (CRs), which sense the spectrum and
implement opportunistic sharing when no licensed user is
found to use it, are able to improve the efficiency of
spectrum. Spectrum sensing must be firstly solved in CRs.
Cooperative sensing can make good use of network
resources, obtain higher gain and make the network steadier Platform: |
Size: 106496 |
Author:phong |
Hits:
Description: In this paper, author consider
cooperative spectrum sensing in order to optimize the sensing
performance and focus on energy detection for spectrum sensing
and find that the optimal fusion rule is the half-voting rule.
Next, the optimal detection threshold of energy detection is
determined numerically. Finally, we propose a fast spectrum
sensing algorithm for a large network which requires Platform: |
Size: 158720 |
Author:hossein |
Hits:
Description: 认知无线电是一种用于提高无线电通信频谱利用率的新的智能技术. 首先简述认知无线电的背景和概念,针
对认知无线电的频谱感知功能,详细地分析基于能量检测的频谱检测方法,在此基础上研究了噪声方差的不确定
性对检测性能的影响. 针对无线信号检测具有本地局域性和能量检测存在信噪比极限的特点,提出一种分布式有
限合作检测机制,推导出基于“OR”规则的有限合作机制的检测概率,并进行Monte Carlo仿真.-Cognitive radio is a radio communications spectrum used to improve the efficiency of the new smart technology. First, the background and outlined the concept of cognitive radio, spectrum sensing for cognitive radio capabilities, a detailed analysis of the spectrum based on energy detection test In this study the noise variance based on the uncertainty of the detection performance. for wireless signal detection with local detection of localized and there is signal to noise ratio limit of the energy characteristics of a distributed cooperative detection mechanism, derived out based on " OR" rules of the detection probability of the limited cooperation mechanism and conduct Monte Carlo simulation. Platform: |
Size: 183296 |
Author:林熙怡 |
Hits:
Description: 基于双门限的协作能量检测方法以及Dempster-Shafer理论-Double Threshold Energy Detection of Cooperative Spectrum Sensing in Cognitive Radio Platform: |
Size: 661504 |
Author:陈蓝天 |
Hits:
Description: 协作频谱感知虽然可提高系统的感知性能， 但随着感知节点数目的增加， 系统资源的占用越来越多，
系统传输效率下降． 分析了协作频谱感知方法的感知性能， 得到协作频谱感知的感知性能与感知节点数目和接
收信噪比之间的关系， 提出了一种新的次级用户节点的选择方法， 该方法有效保证了所选择节点的感知性能，
仿真验证了该算法的有效性和可靠性．-Although the cooperative spectrum sensing can improve the perceived performance of the system, but with the perception of the number of nodes increases, more and more system resources, the system transmission efficiency decreased. Cooperative spectrum sensing method of analysis of the perceived performance of collaborative spectrum sensing by the perception of performance and perception of the number of nodes and the relationship between the received SNR, a new secondary user node selection method, which effectively guarantee perceived performance of the selected node, the simulation proves the validity and reliability. Platform: |
Size: 1068032 |
Author:江中 |
Hits:
Description: 一篇很好的关于认知无线电协作频谱感知方面的英文资料，具有很高的参考价值。-A good collaboration on spectrum sensing in cognitive radio information in English, with a high reference value. Platform: |
Size: 569344 |
Author:feixiang |
Hits:
Description: 仿真实现了关于认知无线电中合作频谱检测的性能分析-Simulation to achieve the performance of cooperative spectrum sensing in cognitive radio Platform: |
Size: 10240 |
Author:张杰 |
Hits:
Description: 概括了各种认知无线电频谱检测方法的原理，也论述了带有多接收机的协作频谱感应方法和一些实际问题。-Outlined the principles of cognitive radio spectrum detection method, also discussed with multiple receiver cooperative spectrum sensing method and some of the practical problems. Platform: |
Size: 703488 |
Author:maning |
Hits:
Description: This a program to describe cooperative spectrum sensing of Cognitive radio implemented in cognitive radio-This is a program to describe cooperative spectrum sensing of Cognitive radio implemented in cognitive radio Platform: |
Size: 1024 |
Author:Nithyakumar |
Hits:
Description: Cooperative Spectrum Sensing in Multiple Antenna Based Cognitive Radio Network Using An Improved Energy Detector
-Cooperative Spectrum Sensing in Multiple Antenna Based Cognitive Radio Network Using An Improved Energy Detector
Platform: |
Size: 2048 |
Author:mahru |
Hits:
Search - cooperative spectrum sensing