Second-Order Statistics in Weibull-Lognormal Fading Channels

Mitic, A.; Jakovljevic, M.M.

doi:10.1109/telsks.2007.4376062

Cited by 3 publications

(3 citation statements)

References 13 publications

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“…In such a way, the paper [21] treats second order characteristics of the signal envelope in the receiver in mobile radio channels under the influence of Weibull fading and shadowing. The output signal is represented as the product of Weibull and log-normal process.…”

Section: Related Workmentioning

confidence: 99%

Level crossing rate of SC receiver over gamma shadowed Weibull multipath fading channel

et al. 2016

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Original scientific paper The wireless telecommunication system consisting of selection combining (SC) receiver which works in Gamma shadowed Weibull multiple-faded channel is discussed in this work. The received signal suffers Weibull small scale fading which leads in variation of the signal envelope and Gamma large scale fading which results in variation of the SC receiver output signal envelope power. SC receiver is utilized to abate the impact of Gamma large scale fading effects and Weibull small scale fading effects on system characteristics. The formula for average level crossing rate (LCR) of signal envelope at SC combiner output is performed in the closed shape. The result we get can be applied to calculate the average fade duration (AFD) of such wireless systems. The obtained solutions are plotted in a few graphs to point out the impact of Weibull fading envelope severity parameter and Gamma shadowing severity parameter on system features. Keywords: Gamma shadowing; level crossing rate (LCR); selection combining (SC); Weibull fading Srednji broj osnih presjeka kod SC prijemnika u kanalu s Weibull-ovim fedingom i Gamma sjenkomIzvorni znanstveni članak U ovom radu je razmotren bežični telekomunikacijski sustav sa SC prijemnikom koji radi u prisustvu Weibull-ovog fedinga i Gamma sjenke. Utjecaj Weibull-ovog fedinga na primljeni signal se ogleda u promjeni anvelope signala, a utjecaj Gamma sjenke u promjeni snage izlaznog signala. SC prijemnik se koristi za smanjenje utjecaja fedinga i sjenke na karakteristike sustava. Izraz za srednji broj osnih presjeka izlaznog signala iz SC prijemnika je izveden u zatvorenom obliku. Dobiveni rezultati se mogu koristiti za izračunavanje prosječnog trajanja otkaza bežičnog sustava. Numerički rezultati su predstavljeni grafički, kako bi se prikazao utjecaj parametara fedinga i sjenke na karakteristike sustava.

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Section: Related Workmentioning

confidence: 99%

Level crossing rate of SC receiver over gamma shadowed Weibull multipath fading channel

et al. 2016

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“…The expression (7) can be directly applied to fading environments with known LCR and envelope PDF at the output of each MRC receiver, denoted by N Ri (·) and F Ri (·), respectively In practice it is usual that threshold level at the receiver -µ is set to the value that is smaller than the root mean value Ω, in order to obtain reasonable indication of outage [17][18].…”

Section: Performance Analysismentioning

confidence: 99%

Performance Analysis of Selecting Maximal Ratio Combining Hybrid Diversity System over Ricean Fading Channels

Spalević¹,

Stefanović²,

Panic³

et al. 2014

Automatika

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In this paper an approach to the performance analysis of hybrid MRCS (Selection Maximal Ratio Combining) diversity system operating over Ricean fading channels is presented. Hybrid MRCS combining method has a simple implementation, where maximal-ratio combined signals are chosen on a selection combining basis. Closed form expressions are provided for standard first and second order statistical measures for the signal at the output of the combiner, i.e. PDF (probability density function), CDF (cumulative distribution function), LCR (level crossing rate). Capitalizing on them standard performance measures like ABEP (Average Bit Error Probability) over some modulation techniques and AFD (Average Fade Duration) are efficiently evaluated and discussed in the function of various system parameters.

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“…Diğer bir deyişle, [19]'da sunulan raporda, Weibull kanal ortamının gerçek kablosuz iletim ortamları ile test sonuçlarının uygunluğu açıkça izah edilmiştir. Weibull kanalının bütün bu anlatılan özelliklerine ek olarak log-normal dağılımı ile birleşimiyle yeni bir karma tipi olarak Weibull/log-normal sönümlü kanal modeli geliştirilmiştir [20]. Bu sayede log-normal dağılımı kullanılarak gölgeleme etkisinin de Weibull dağılımına yansıtılması hedeflenmiştir.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Karma Weibull/Log-Normal Sönümlenmeli Kanalın Hata Olasılığı Analizi

Bilim

2019

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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ÖzBu çalışmada, tek-girişli tek-çıkışlı (single-input single-output, SISO) sistemin karma Weibull/log-normal sönümlenmeli kanallardaki hata olasılığı incelenmiştir. Ele alınan SISO sisteminin birçok gerçekçi iletişim senaryosundaki sönümlenme etkilerini karakterize etmede faydalı olan karma Weibull/log-normal ortamında analizinin yapılması hedeflenmiştir. Bu yüzden, Weibull/log-normal sönümlenmeli kanalının kümülatif dağılım fonksiyonu (cumulative distribution function, CDF) kullanılarak hata olasılığı ifadesi kapalı formda elde edilmiştir. Önerilen bu ifade CDF tabanlı olup, farklı ikili sayısal modülasyon türleri için geçerlidir. Çalışmada sunulan bütün sonuçlar bilgisayar benzetimleri ile doğrulanmıştır. AbstractIn this study, error probability of a single-input single-output (SISO) system is investigated over a composite Weibull/log-normal fading channel. We aim to study a SISO system in the composite Weibull/log-normal composite fading model which is useful in characterizing fading effects in numerous realistic communication scenarios. Therefore, a closed-form error probability expression was derived by using cumulative distribution function (CDF) of a Weibull/log-normal fading channel. The proposed error probability expression is based on CDF and is valid for different binary digital modulation types. Results that are given in this study were confirmed by computer simulations.

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Second-Order Statistics in Weibull-Lognormal Fading Channels

Cited by 3 publications

References 13 publications

Level crossing rate of SC receiver over gamma shadowed Weibull multipath fading channel

Level crossing rate of SC receiver over gamma shadowed Weibull multipath fading channel

Performance Analysis of Selecting Maximal Ratio Combining Hybrid Diversity System over Ricean Fading Channels

Karma Weibull/Log-Normal Sönümlenmeli Kanalın Hata Olasılığı Analizi

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