Advanced sensing techniques of energy detection in cognitive radios

Wang, Hano; Noh, Gosan; Kim, Dongkyu; Kim, Sung-Tae; Hong, Daesik

doi:10.1109/jcn.2010.6388431

Cited by 37 publications

(24 citation statements)

References 42 publications

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“…The term a(h r ) is an antenna height-gain correction factor that depends upon the environment [39]. It is equal to zero for h r = 0 otherwise it is equal to 3.2(log 10 11.75h r ) 2 − 4.97 with f MHz > 300, which was the case in our situation.…”

Section: P Lmentioning

confidence: 69%

Systematic Analysis of Geo-Location and Spectrum Sensing as Access Methods to TV White Space

Mauwa

Bagula

Zennaro

et al. 2017

JICTS

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Access to the television white space by white space devices comes with a major technical challenge: white space devices can interfere with existing television signals. Two methods have been suggested in the literature to help white space devices identify unused channels in the TV frequency band so that they can avoid causing harmful interference to primary users; geo-location spectrum database and spectrum sensing. Discussions in the literature have placed much emphasis on the limitations of the spectrum sensing approach mainly from the perspective of the developed world environment in which its drawbacks are significant. Little attention has been placed to the limitations of the geo-location database approach when applied in a developing regions. H. Mauwa et al.This paper considers a broader analysis of the approaches by looking at factors that can affect their performance and how the presence or absence of these factors in a developed region or developing region can affect their applicability. In so doing, the paper highlights the need to conduct more research on the performance of spectrum sensing in developing regions where there are much less TV broadcasting stations and therefore, white spaces are more abundant.

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Section: P Lmentioning

confidence: 69%

Systematic Analysis of Geo-Location and Spectrum Sensing as Access Methods to TV White Space

Mauwa

Bagula

Zennaro

et al. 2017

JICTS

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“…By contrast hierarchical spectrum sharing is when primary users always have priority for spectrum access, while secondary users need to make sure that the interference caused to primary users is not harmful before accessing the spectrum. Based on the impact of interference, hierarchical spectrum sharing is divided into two groups: underlay and overlay spectrum sharing [59]. Underlay spectrum sharing is when the interference caused by a secondary user to a primary receiver is below a predefined threshold.…”

Section: Interference Mitigation and Spectrum Sharingmentioning

confidence: 99%

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Maloku

Fazliu

Ibrani

2018

Wireless Communications and Mobile Computing

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With the advent of analog to digital transition in TV broadcasting, a substantial amount of spectrum has become available in TV bands. To take advantage of this, the idea for cognitive radios was introduced for two major reasons: better utilization of spectrum in urban areas and facilitation of wireless connectivity in rural areas. To achieve these two goals, however, many challenges have to be addressed first. Considering that these frequencies are commonly licensed, besides primary user detection, a serious challenge remains the detection and identification of other secondary devices and networks. The problems arising from this issue concern the coexistence problems happening from having several primary and secondary networks of different technologies cohabiting the same licensed spectrum simultaneously and from many secondary systems/users coexisting at the same place while using identical or different technologies. In this survey we provide a review of existing works and outline new challenges regarding coexistence and self-coexistence in heterogeneous wireless networks in TV White Spaces including a comparative analysis between selected coexistence mechanisms.

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“…When is relatively large enough, can be well approximated as a Gaussian random variable under both hypotheses and , and it follows chi-square distribution with a degree of freedom MN [20]. According to the central limit theorem (CLT) the detection problem in Eq.…”

Section: Proposed Multiple Energy Detector System Modelmentioning

confidence: 99%

“…A number of researchers have investigated multiple antennas from various points of view in various areas of research [16][17][18][19]. The author in [20] intensively studied the performance of cooperative spectrum sensing and multiple antennas analytically. In [21], the author has quantified the detection performance as a function of antenna correlation in branches and the number of antennas and employed the square law combination.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Multiple Energy Detector on Evidence Theory Based Cooperative Spectrum Sensing Scheme for Cognitive Radio Networks

2015

J Inf Process Syst

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Spectrum sensing is an essential function that enables cognitive radio technology to explore spectral holes and resourcefully access them without any harmful interference to the licenses user. Spectrum sensing done by a single node is highly affected by fading and shadowing. Thus, to overcome this, cooperative spectrum sensing was introduced. Currently, the advancements in multiple antennas have given a new dimension to cognitive radio research. In this paper, we propose a multiple energy detector for cooperative spectrum sensing schemes based on the evidence theory. Also, we propose a reporting mechanism for multiple energy detectors. With our proposed system, we show that a multiple energy detector using a cooperative spectrum sensing scheme based on evidence theory increases the reliability of the system, which ultimately increases the spectrum sensing and reduces the reporting time. Also in simulation results, we show the probability of error for the proposed system. Our simulation results show that our proposed system outperforms the conventional energy detector system.

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Advanced sensing techniques of energy detection in cognitive radios

Cited by 37 publications

References 42 publications

Systematic Analysis of Geo-Location and Spectrum Sensing as Access Methods to TV White Space

Systematic Analysis of Geo-Location and Spectrum Sensing as Access Methods to TV White Space

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

The Effect of Multiple Energy Detector on Evidence Theory Based Cooperative Spectrum Sensing Scheme for Cognitive Radio Networks

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