Cooperative and noncooperative spectrum sensing techniques using Welch&amp;#x2019;s periodogram in cognitive radios

Sarvanko, Heli; Mustonen, Miia; Hekkala, Atso; Mämmelä, Aarne; Matinmikko, Marja; Katz, Marcos

doi:10.1109/cogart.2008.4509987

Cited by 38 publications

(32 citation statements)

References 14 publications

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“…We have studied the performance of energy detection using the Welch's periodogram method in an AWGN channel from a spectrum sensing and CR perspective [16]. The simulations show that Welch's periodogram signal detection method operates well for narrowband signals.…”

Section: A Spectrum Sensingmentioning

confidence: 98%

“…However, adding phenomena such as shadowing, multipath fading, or hidden terminal problem to the simulation model would increase unreliability on the sensing information and could therefore lead into results favoring more extensive cooperation between users. The results from our performance evaluation studies for spectrum sensing are described in more detail in [16]. The performance evaluation of spectrum sensing techniques is important in assessing their feasibility for practical systems.…”

Section: A Spectrum Sensingmentioning

confidence: 99%

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A motivating overview of cognitive radio: Foundations, regulatory issues and key concepts

Matinmikko

Mustonen

Sarvanko

et al. 2008

2008 First International Workshop on Cognitive Radio and Advanced Spectrum Management

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The radio frequency spectrum is a scarce natural resource and its efficient use is of the utmost importance. A fundamental problem facing the future wireless systems is where to find suitable spectrum bands to meet the demand of future services. A promising technique to improve the spectrum utilization under a lot of investigation is the cognitive radio (CR) concept. This paper provides an overview of a CR study with discussion on enabling techniques for CR, measurements on current spectrum use, forthcoming standardization activities and some findings from our recent research studies on spectrum sensing, frequency management, and power control.The measurements on current spectrum use have identified that in general the overall spectrum occupancy is low. However, the overall spectrum occupancy does not characterize the actual situation adequately and better measures are needed. International Telecommunication Union Radiocommunication sector (ITU-R) has started standards activities on CRs, in particular on the measurement of spectrum occupancy and CR systems in the mobile service, indicating that the inclusion of the CR concept into the future regulatory framework is topical.Reliable spectrum sensing is a crucial task of the CR and proper performance assessment is important. If the future availability times of spectrum holes can be predicted, intelligent channel selection with the predicted channel information can be useful. A power control candidate for the CR system is the truncated inverse power control.

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Section: A Spectrum Sensingmentioning

confidence: 98%

Section: A Spectrum Sensingmentioning

confidence: 99%

A motivating overview of cognitive radio: Foundations, regulatory issues and key concepts

Matinmikko

Mustonen

Sarvanko

et al. 2008

2008 First International Workshop on Cognitive Radio and Advanced Spectrum Management

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show abstract

“…The theoretical performance analysis of energy detection presented in [3] was generalized to Welch's periodogram [4] in AWGN channel and verified by simulations in [5]. In fading environment spectrum sensing becomes more challenging due to the uncertainty from radio wave propagation.…”

Section: Introductionmentioning

confidence: 94%

Performance of spectrum sensing using Welch's periodogram in rayleigh fading channel

Matinmikko

Sarvanko

Mustonen

et al. 2009

2009 4th International Conference on Cognitive Radio Oriented Wireless Networks and Communications

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In this paper we present theoretical performance evaluation of spectrum sensing with energy detection using Welch's periodogram for cognitive radio systems. We generalize the theoretical expressions for the probability of detection and the probability of false alarm of energy detection in Rayleigh fading channel to the case of Welch's periodogram. We verify the theoretical results by simulations both in single node and cooperative sensing scenarios. In particular, cooperation is crucial in fading environment. Protection of primary systems from harmful interference is the key requisite for the introduction of cognitive radio systems into the future spectrum regulatory framework if the systems are deployed on the same spectrum bands. The primary user's concern is how often it could be susceptible to potential interference from the cognitive radio system, which, as we show, is dependent on the probability of detection. Therefore, performance evaluation and in particular the probability of detection is critical in assessing the potential capabilities of the future cognitive radio systems.

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“…Therefore data and cooperation information have to be multiplexed that can cause degradation of throughput for the cognitive user. Lastly, cooperative detection needs control channels [9].…”

Section: B Cooperative Detectionmentioning

confidence: 99%

Spectrum Sensing for Cognitive Radio

Wang

2009

2009 Third International Symposium on Intelligent Information Technology Application Workshops

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Cognitive radio is considered as a promising approach to improve the utilization efficiency of radio spectrum resources. One of the key technologies of cognitive radio is spectrum sensing. A survey of spectrum sensing methodologies for cognitive radio is presented in the paper. The advantages and disadvantages of several spectrum sensing algorithms are analyzed and the challenges of spectrum sensing to be realized are also proposed.

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Cooperative and noncooperative spectrum sensing techniques using Welch’s periodogram in cognitive radios

Cited by 38 publications

References 14 publications

A motivating overview of cognitive radio: Foundations, regulatory issues and key concepts

A motivating overview of cognitive radio: Foundations, regulatory issues and key concepts

Performance of spectrum sensing using Welch's periodogram in rayleigh fading channel

Spectrum Sensing for Cognitive Radio

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