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Distributed spectrum sensing in the presence of selfish users

Related publications (32)

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Optimal Multiband Joint Detection for Spectrum Sensing in Cognitive Radio Networks

Ali H. Sayed

Spectrum sensing is an essential functionality that enables cognitive radios to detect spectral holes and to opportunistically use under-utilized frequency bands without causing harmful interference to legacy (primary) networks. In this paper, a novel wide ...

Institute of Electrical and Electronics Engineers2009

Cooperative spectrum sensing via sequential detection for cognitive radio networks

Ali H. Sayed

Efficient and reliable spectrum sensing plays a critical role in cognitive radio networks. This paper presents a cooperative sequential detection scheme tominimize the average sensing time that is required to reach a detection decision. In the scheme, each ...

IEEE2009

Digital Compensation of Cross-Modulation Distortion in Software-Defined Radios

Ali H. Sayed

The wideband RF receiver in a software-defined radio (SDR) system suffers from the nonlinear effects caused by the front-end analog processing. In the presence of strong blocker (interference) signals, such nonlinearities introduce severe cross modulation ...

2009

Cooperative spectrum sensing via coherence detection

Ali H. Sayed

Efficient and reliable spectrum sensing plays a critical role in cognitive radio networks. This paper proposes a cooperative sensing scheme that detects the existence of a common signal component in the signals received by multiple geographically distribut ...

IEEE2009

Efficient MAC in cognitive radio systems: A game-theoretic approach

Jean-Pierre Hubaux, Mark Felegyhazi, Mario Cagalj

In this paper, we study the problem of efficient medium access control (MAC) among cognitive radio devices that are equipped with multiple radios and thus are capable of transmitting simultaneously at different frequencies (channels). We assume that radios ...

2009

Optimal linear fusion for distributed spectrum sensing via semidefinite programming

Ali H. Sayed

As an enabling functionality of overlay cognitive radio networks, spectrum sensing needs to reliably detect licensed signal in the band of interest. To achieve reliable sensing, we propose a linear fusion scheme for distributed spectrum sensing to combine ...

IEEE2009

Wideband Spectrum Sensing in Cognitive Radio Networks

Ali H. Sayed

Spectrum sensing is an essential enabling functionality for cognitive radio networks to detect spectrum holes and opportunistically use the under-utilized frequency bands without causing harmful interference to legacy networks. This paper introduces a nove ...

IEEE2008

Spatial-spectral joint detection for wideband spectrum sensing in cognitive radio networks

Ali H. Sayed

Spectrum sensing is an essential functionality that enables cognitive radios to detect spectral holes and opportunistically use under-utilized frequency bands without causing harmful interference to primary networks. Since individual cognitive radios might ...

IEEE2008

Optimal Linear Cooperation for Spectrum Sensing in Cognitive Radio Networks

Ali H. Sayed

Cognitive radio technology has been proposed to improve spectrum efficiency by having the cognitive radios act as secondary users to opportunistically access under-utilized frequency bands. Spectrum sensing, as a key enabling functionality in cognitive rad ...

IEEE2008

Collaborative wideband sensing for cognitive radios

Ali H. Sayed

Cognitive radio (CR) has recently emerged as a promising technology to revolutionize spectrum utilization in wireless communications. In a CR network, secondary users continuously sense the spectral environment and adapt transmission parameters to opportun ...

IEEE2008