An OFDM signal identification method for wireless communications systems

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dc.authorid0000-0001-9474-7372
dc.contributor.authorGörçin, Ali
dc.contributor.authorArslan, Hüseyin
dc.date.accessioned10.07.201910:49:13
dc.date.accessioned2019-07-10T19:56:20Z
dc.date.available10.07.201910:49:13
dc.date.available2019-07-10T19:56:20Z
dc.date.issued2015
dc.departmentİstanbul Medipol Üniversitesi, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik ve Elektronik Mühendisliği Bölümü
dc.descriptionWOS: 000367547700024
dc.description.abstractDistinction of orthogonal frequency-division multiplexing (OFDM) signals from single-carrier signals is highly important for adaptive receiver algorithms and signal identification applications. OFDM signals exhibit Gaussian characteristics in the time domain, and fourth-order cumulants of Gaussian distributed signals vanish, in contrast to the cumulants of other signals. Thus, fourth-order cumulants can be utilized for OFDM signal identification. In this paper, first, formulations of the estimates of the fourth-order cumulants for OFDM signals are provided. Then, it is shown that these estimates are significantly affected by wireless channel impairments, frequency offset, phase offset, and sampling mismatch. To overcome these problems, a general chi-square constant false-alarm rate Gaussianity test, which employs estimates of cumulants and their covariances, is adapted to the specific case of wireless OFDM signals. Estimation of the covariance matrix of the fourth-order cumulants is greatly simplified, peculiar to the OFDM signals. A measurement setup is developed to analyze the performance of the identification method and for comparison purposes. A parametric measurement analysis is provided, depending on modulation order, signal-to-noise ratio, number of symbols, and degree of freedom of the underlying test. The proposed method outperforms statistical tests that are based on fixed thresholds or empirical values, whereas the a priori information requirement and complexity of the proposed method are lower than the coherent identification techniques.
dc.identifier.citationGörçin, A. ve Arslan, H. (2015). An OFDM signal identification method for wireless communications systems. IEEE Transactions on Vehicular Technology, 64(12), 5688-5700. https://dx.doi.org/10.1109/TVT.2015.2388671
dc.identifier.doi10.1109/TVT.2015.2388671
dc.identifier.endpage5700
dc.identifier.issn0018-9545
dc.identifier.issn1939-9359
dc.identifier.issue12
dc.identifier.scopusqualityQ1
dc.identifier.startpage5688
dc.identifier.urihttps://dx.doi.org/10.1109/TVT.2015.2388671
dc.identifier.urihttps://hdl.handle.net/20.500.12511/2670
dc.identifier.volume64
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherInstitute of Electrical and Electronics Engineers
dc.relation.ispartofIEEE Transactions on Vehicular Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/embargoedAccess
dc.subjectAdaptive Receivers
dc.subjectCognitive Radios
dc.subjectFrequency Shift Keying (FSK)
dc.subjectOrthogonal Frequency Division Multiplexing (OFDM)
dc.subjectPhase Shift Keying (PSK)
dc.subjectQuadrature Amplitude Modulation (QAM)
dc.subjectSignal Identification
dc.subjectSpectrum Sensing
dc.titleAn OFDM signal identification method for wireless communications systems
dc.typeArticle

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