395 Hits in 8.8 sec

A Comprehensive Framework for Spectrum Sensing in Non-Linear and Generalized Fading Conditions

Paschalis C. Sofotasios, Alireza Bagheri, Theodoros A. Tsiftsis, Steven Freear, Ali Shahzadi, Mikko Valkama
2017 IEEE Transactions on Vehicular Technology  
To this end, it is shown that the detrimental effects of fading can be effectively mitigated with the aid of square-law combining and switch-and-stay combining methods, as a low number of diversity branches  ...  This is carried out for both conventional and diversity receptions and it is based on the area under the ROC curve (AUC), which is an efficient performance measure that is widely used in physical sciences  ...  Renfors and to Prof. I. Andritsos on the occasion of their 65th birthday.  ... 
doi:10.1109/tvt.2017.2692278 fatcat:hgalcromu5fgfftu53fztxpmsi

Analysis of energy detection with diversity receivers over non-identically distributed κ − μ shadowed fading channels

H. Al-Hmood, H.S. Al-Raweshidy
2017 Electronics Letters  
The performance of energy detection (ED) over κµ shadowed fading channel is analysed.  ...  Moreover, the analysis over κµ extreme shadowed fading channel, that is utilised to model the wireless communications scenarios in enclosed areas, is also investigated.  ...  This is because the unlicensed user can detect any type of unknown signals of the licensed user with low computational and implementation complexities [1] .  ... 
doi:10.1049/el.2016.3242 fatcat:6v4g5rqf7zcszd6244mmnsjcrm

Cooperative Spectrum Sensing over Generalized Fading Channels Based on Energy Detection [article]

He Huang, Chaowei Yuan
2017 arXiv   pre-print
and η-μ fading distribution.  ...  This paper analyzes the unified performance of energy detection (ED) of spectrum sensing (SS) over generalized fading channels in cognitive radio (CR) networks.  ...  On the other side, Fig. 6 and Fig. 7 show that CSS with diversity combining can availably improve the sensing performance of ED over α-κ-μ fading channels when u=2, α=1.35, κ=1.0 and μ=1.0.  ... 
arXiv:1705.06989v3 fatcat:z7lfpskhw5eanah67v5dwdrlbu

Analysis of Energy Detection of Unknown Signals under Beckmann Fading Channels

Juan P. Pena-Martin, Juan M. Romero-Jerez, F. Javier Lopez-Martinez
2017 2017 IEEE 85th Vehicular Technology Conference (VTC Spring)  
The performance of energy detection for multi-branch receivers operating under Beckmann fading is here studied, and the inherent analytical complexity is here circumvented by the derivation of a closed-form  ...  The impact of fading severity on the probability of missed detection is shown to be less critical as the SNR decreases.  ...  The problem of detecting a signal of unknown form in the presence of noise is a classical problem in communication theory, ever since the detection of unknown but deterministic signals using an energy-measuring  ... 
doi:10.1109/vtcspring.2017.8108225 dblp:conf/vtc/Pena-MartinRL17 fatcat:tvjdkqj74jg7rarorh5ljlskcm

Analytic solutions to a Marcum Q-function-based integral and application in energy detection of unknown signals over multipath fading channels [article]

Paschalis C. Sofotasios, Mikko Valkama, Theodoros A. Tsiftsis, Yury A. Brychkov, Steven Freear, George K. Karagiannidis
2016 arXiv   pre-print
To this end, we derive novel expressions for the probability of detection in energy detection based spectrum sensing over η-μ fading channels.  ...  These expressions are given in closed-form and are subsequently employed in analyzing the effects of generalised multipath fading conditions in cognitive radio systems.  ...  of unknown signals over ηµ fading channels.  ... 
arXiv:1505.03346v2 fatcat:l4zewbu6wvajrkfbjpkootri3a

Analytic Solutions to a Marcum Q−Function-Based Integral and Application in Energy Detection of Unknown Signals over Multipath Fading Channels

Paschalis Sofotasios, Mikko Valkama, Theodoros Tsifitsis, Yury Brychkov, Steven Freear, George Karagiannidis
2014 Proceedings of the 9th International Conference on Cognitive Radio Oriented Wireless Networks  
To this end, we derive novel expressions for the probability of detection in energy detection based spectrum sensing over ημ fading channels.  ...  These expressions are given in closed-form and are subsequently employed in analyzing the effects of generalised multipath fading conditions in cognitive radio systems.  ...  ACKNOWLEDGEMENTS The work of P. C. Sofotasios  ... 
doi:10.4108/icst.crowncom.2014.255383 dblp:conf/crowncom/SofotasiosVTBFK14 fatcat:twftfyo27bdoxgufjhmn2qte4m

Generalized MGF of Beckmann Fading With Applications to Wireless Communications Performance Analysis

Juan P. Pena-Martin, Juan M. Romero-Jerez, F. Javier Lopez-Martinez
2017 IEEE Transactions on Communications  
Thus, we obtain simple exact expressions for the energy detection performance in Beckmann fading channels, both in terms of the receiver operating characteristic (ROC) curve and of the area under ROC curve  ...  The Beckmann distribution is a general multipath fading model for the received radio signal in the presence of a large number of scatterers, which can thence be modeled as a complex Gaussian random variable  ...  When compared to the available results for generalized fading channels [28] [29] [30] such as κ-µ, η-µ and α-µ, they are all given in terms of a finite summation.  ... 
doi:10.1109/tcomm.2017.2688396 fatcat:eqecelhphzdf7l25rcue3auzca

A Union Bound on the Error Probability of Binary Codes Over Block-Fading Channels

S.A. Zummo, P.-C. Yeh, W.E. Stark
2005 IEEE Transactions on Vehicular Technology  
In this paper, a union bound on the error probability of binarycoded systems over block-fading channels is proposed.  ...  A lower bound on the performance of iterative receivers that perform joint decoding and channel estimation is obtained assuming the receiver knows the correct data and uses them as pilots.  ...  In (3), θ f is the unknown phase of the received signals in block f, δ(x, y) = 1 if x = y and δ(x, y) = 0, otherwise, and η (I ,0) f ,l , η (Q,0) f ,l η (I ,1) f ,l and η (Q,1) f ,l are independent random  ... 
doi:10.1109/tvt.2005.858173 fatcat:roerjtdxf5bwdhku42xm6etihe

Capacity and Error Probability Analysis for Orthogonal Space-Time Block Codes over Correlated Rayleigh and Rician Fading Channels

2005 IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences  
In this paper, the capacity and error probability of orthogonal space-time block codes (STBCs) are presented for PAM/PSK/QAM modulation in correlated flat fading channels.  ...  We consider an equivalent scalar AWGN (additive white Gaussian noise) channel with a channel gain proportional to the Frobenius norm of the matrix channel.  ...  For noncoherent detection of binary signals in an AWGN channel, the error probability with an optimum matched filter receiver is given by P d (γ s ) = 1 2 exp(−γ s ), (64) for DPSK.  ... 
doi:10.1093/ietfec/e88-a.11.3203 fatcat:fwwdzwsa75bo5bwsfe25evyui4

Bit Error Probability of SM-MIMO Over Generalized Fading Channels

Marco Di Renzo, Harald Haas
2012 IEEE Transactions on Vehicular Technology  
Furthermore, by focusing on the Nakagami-m fading scenario with generically correlated fading, we show that the fading severity plays a very important role in determining the diversity gain of SM.  ...  role played by the bit mapping on the signal-and spatial-constellation diagrams.  ...  The signal received by the n r -th receive-antenna, if µ ñ t , χl is transmitted, is: z nr (t) = s ch,nr t| µ ñ t , χl + η nr (t) (1) where s ch,nr t| µ ñ t , χl = s ·| µ ñ t , χl ⊗ hñ t,nr (t) = √ E m  ... 
doi:10.1109/tvt.2012.2186158 fatcat:6nywroxulrbfro7za6hcdl75me

Performance Analysis of Dynamic Downlink PPP Cellular Networks Over Generalized Fading Channels With MRC Diversity

Ashraf Al-Rimawi, Jamal Siam, Ali Abdo, Davide Dardari
2021 IEEE Access  
The proposed expressions are applicable to different widely-used fading environments, such as Rayleigh and Nakagami-m as particular cases, by an appropriate selection of the η-µ parameters.  ...  The η-µ distribution is employed to derive the received power probability density function, the average bit error rate for different modulation schemes, and the coverage probability assuming a Poisson  ...  In [21] , the authors derived the outage probability in a scenario at which the signal of interest experienced η-µ or κ-µ fading.  ... 
doi:10.1109/access.2021.3063194 fatcat:ecnv4bmtwje2tepnhanbyit5hm

Wireless Powered Cognitive Radio Networks With Compressive Sensing and Matrix Completion

Zhijin Qin, Yuanwei Liu, Yue Gao, Maged Elkashlan, Arumugam Nallanathan
2017 IEEE Transactions on Communications  
Subsequently, compressive sensing and matrix completion techniques are invoked to recover the original signals at the fusion center, by utilizing the sparsity property of spectral signals.  ...  In this paper, we consider cognitive radio networks in which energy constrained secondary users (SUs) can harvest energy from the randomly deployed power beacons (PBs).  ...  Thus the received signals from active PUs with channel noise.  ... 
doi:10.1109/tcomm.2016.2623606 fatcat:6m4jfd3h6rcjdkrvpfpatpix7a

Energy detection based spectrum sensing over enriched multipath fading channels

Alireza Bagheri, Paschalis C. Sofotasios, Theodoros A. Tsiftsis, Khuong Ho-Van, Michael I. Loupis, Steven Freear, Mikko Valkama
2016 2016 IEEE Wireless Communications and Networking Conference  
As a result, they can be utilized in quantifying the effect of fading in energy detection based spectrum sensing and in the determination of the trade-offs between sensing performance and energy efficiency  ...  Based on this, it is shown that the performance of the energy detector depends highly on the severity of fading as even slight variations of the fading conditions affect the value of the average probability  ...  Finally, the detection of unknown signals in low signal-to-noise-ratio (SNR) over K−distributed (K), generalized K (K G ) and the flexible ηµ, κµ and mixture gamma fading channels were addressed in  ... 
doi:10.1109/wcnc.2016.7565141 dblp:conf/wcnc/BagheriSTHLFV16 fatcat:z63azf6cjvbo5dv32wmjkkluau

On the Efficient Generation ofα-κ-μandα-η-μWhite Samples with Applications

Rausley Adriano Amaral de Souza, Antonio Marcelo Oliveira Ribeiro, Dayan Adionel Guimarães
2015 International Journal of Antennas and Propagation  
and the second one dealing with the performance assessment of the spectrum sensing with energy detection over special cases of these channels.  ...  We also provide two important applications for the random sequence generator, the first one dealing with the performance assessment of a digital communication system over theα-κ-μandα-η-μfading channels  ...  Conflict of Interests The authors declare that there is no conflict of interests regarding the publication of this paper.  ... 
doi:10.1155/2015/873890 fatcat:5wjxcgolgfezfencvfyyhfxw34

Performance Analysis of Ad Hoc Dispersed Spectrum Cognitive Radio Networks over Fading Channels

Khalid A. Qaraqe, Hasari Celebi, Muneer Mohammad, Sabit Ekin
2011 EURASIP Journal on Wireless Communications and Networking  
In this paper, we first provide the performance analysis of such systems over fading channels.  ...  We derive the average symbol error probability of dispersed spectrum cognitive radio systems for two cases, where the channel for each frequency diversity band experiences independent and dependent Nakagami-m  ...  In the case of diversity, information (or signal) is replicated K times and each copy is transmitted over one of the available K bands as shown in Figure 1 .  ... 
doi:10.1155/2011/849105 fatcat:3yqc54f6dvedvczzciqanbmibu
« Previous Showing results 1 — 15 out of 395 results