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 |
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Description: 随机感知的机会频谱接入，方法思路较简单-randomly sense channel of opportunistic spectrum access in cognitive radio Platform: |
Size: 1024 |
Author:xiaogan |
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Description: 认知无线电频谱感知算法综述2009.对主流感知算法进行了介绍，引入了多维频谱感知算法。-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. Platform: |
Size: 451584 |
Author:zhou |
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Description: Decentralized Cognitive MAC for Opportunistic Spectrum Access in Ad Hoc Networks A POMDP Framework Platform: |
Size: 762880 |
Author:tran |
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Description: In last decades, the demand of wireless spectrum has
increased rapidly with the development of mobile communication
services. Recent studies recognize that traditional fi xed spectrum
assignment does not use spectrum effi ciently. Such a wasting
phenomenon could be amended after the present of cognitive
radio. Cognitive radio is a new type of technology that enables
secondary usage to unlicensed user. This paper presents an
Opportunistic Cognitive MAC Protocol (OC-MAC) for cognitive
radios to access unoccupied resource opportunistically and coex-
ist with wireless local area network (WLAN). By a primary traffi c
predication model and transmission etiquette, OC-MAC avoids
producing fatal damage to licensed users. Then a ns2 simulation
model is developed to evaluate its performance in scenarios with
coexisting WLAN and cognitive network.-In last decades, the demand of wireless spectrum has
increased rapidly with the development of mobile communication
services. Recent studies recognize that traditional fi xed spectrum
assignment does not use spectrum effi ciently. Such a wasting
phenomenon could be amended after the present of cognitive
radio. Cognitive radio is a new type of technology that enables
secondary usage to unlicensed user. This paper presents an
Opportunistic Cognitive MAC Protocol (OC-MAC) for cognitive
radios to access unoccupied resource opportunistically and coex-
ist with wireless local area network (WLAN). By a primary traffi c
predication model and transmission etiquette, OC-MAC avoids
producing fatal damage to licensed users. Then a ns2 simulation
model is developed to evaluate its performance in scenarios with
coexisting WLAN and cognitive network. Platform: |
Size: 177152 |
Author:eng |
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Description: 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. Platform: |
Size: 453632 |
Author:mddaud |
Hits:
Description: 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: 456704 |
Author:Deepesh |
Hits:
Description: Spectral Efficiency Analysis in OFDM and
OFDM/OQAM based Cognitive Radio Networks
The future wireless communication is expected to
be able to improve the efficiency of spectrum usage. To solve the challenge of spectrum shortage, an innovative opportunistic spectrum access strategy, called Cognitive Radio (CR) has been proposed. Platform: |
Size: 165888 |
Author:Honaleum |
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Description: Cognitive Adaptive Medium Access Control in Cognitive Radio Sensor Networks Spectrum sensing is an integral part of MAC in CR networks and also an energy-consuming operation.
Cognitive adaptive MAC (CAMAC) protocol, supports opportunistic transmission, addressing the issue of power limitation.
Energy conservation in CAMAC is achieved in three fronts: on-demand spectrum sensing, limiting the number of spectrum sensing nodes, and applying a duty cycle.
-Cognitive Adaptive Medium Access Control in Cognitive Radio Sensor Networks Spectrum sensing is an integral part of MAC in CR networks and also an energy-consuming operation.
Cognitive adaptive MAC (CAMAC) protocol, supports opportunistic transmission, addressing the issue of power limitation.
Energy conservation in CAMAC is achieved in three fronts: on-demand spectrum sensing, limiting the number of spectrum sensing nodes, and applying a duty cycle.
Platform: |
Size: 56320 |
Author:balavishnu |
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Description: In this paper, power control algorithm using Iterative Partitioned Water Filling (IPW) are performed for CR network with multiple PUs and SUs under opportunistic spectrum access mode. Platform: |
Size: 861184 |
Author:ririe_hehehe
|
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Search - opportunistic spectrum access