Performance Analysis of Cooperative Cellular Relaying Networks

Yu, Hyungseok; Stuber, G.L.

doi:10.1109/tvt.2012.2223248

Cited by 6 publications

(3 citation statements)

References 21 publications

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“…It is noted that similar to [31], the channel gains of both desired and interfering signals are related to the distance as well as the propagation path loss between the transmitter and the receiver. Next we assume that the envelopes of channel complex gains, i.e., h eu n,k , h ea n,k , h au m,k , h Ieu,i , h Iau,i , h Iea,i , follow the Rayleigh distribution and hence their squares are exponentially distributed.…”

Section: System and Interference Modelmentioning

confidence: 95%

Coordinated Tethering for Multi-RAT Cellular Networks: An Algorithmic Solution and Performance Analysis

Bithas¹,

Lioumpas²

2013

Preprint

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The radio resources management in multi-radio access technology (multi-RAT) heterogeneous networks plays a dominant role in satisfying the high data rates of current and future applications. With the WiFi technology being the spearhead of the wireless local area networks (WLAN)s, the exploitation of already deployed WLANs (e.g., WiFi access points (AP)s) has attracted considerable attention, as an efficient and practical method to improve the performance of wireless networks. Based on the coordinated tethering concept, we introduce a purely wireless heterogeneous network deployment, where cellular and WLAN radio resources are optimally coordinated towards the universal maximization of user throughput. The wireless users are instructed by the eNB about their role in the network (normal user or AP) and the access technology they have to employ. Important performance metrics of the proposed hybrid scheme, including the bit error probability, the ergodic capacity and the average signal-to-interference-plus noise ratio (SINR), are theoretically studied and closed form expressions are derived for the single-user case with multiple interferers, for both identical and non-identical fading conditions. Also, based on the general multi-cellular hybrid WLAN/Cellular concept, we first propose an intercell interference minimization approach. Then we present a novel scheme for achieving frequency reuse equal to one within a single macro-cell, under specific performance criteria and constraints, that guarantee the overall cell's or the individual user's quality-of-service requirements. For the latter case we consider two optimization problems that aim at the overall cell's SINR maximization or at the minimum user's SINR maximization. For all optimization problems, we propose fast greedy solutions. Numerical results and simulations show that the proposed wireless architecture may offer significant performance gains in the presence of multiple interferers, compared to a conventional cellular network.

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Section: System and Interference Modelmentioning

confidence: 95%

Coordinated Tethering for Multi-RAT Cellular Networks: An Algorithmic Solution and Performance Analysis

Bithas¹,

Lioumpas²

2013

Preprint

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“…Closed‐form expressions for the probability density function (PDF) and cumulative distribution function (CDF) of the output signal‐to‐interference ratio (SIR) are derived for the switch and stay combining diversity over correlated Weibull fading channels . In , the outage probability of DF relaying scheme over shadowed Nakagami channels is analyzed for various relay locations. In , the authors derived the closed form for outage probability and the average SER of a dual‐hop fixed‐gain AF relay system.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of cooperative network over Nakagami and Rician fading channels

Khan

Rajatheva

Tanoli

et al. 2013

Int J Communication

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SUMMARYThis paper presents an analysis on the performance of single-relay and multiple fixed-relay cooperative network. The relay nodes operate in amplify-and-forward (AF) mode and transmit the signal through orthogonal channels. We consider maximal-ratio combining at the destination to get the spatial diversity by adding the received signals coherently. The closed-form moment-generating function (MGF) for the total equivalent signal-to-noise ratio (SNR) is derived. The exact expressions of symbol-error rate, outage capacity, and outage probability are obtained using the closed-form MGF for single-relay and multiple-relay cooperative network with M -ary phase shift keying (M -PSK) and M -ary quadrature amplitude modulation (M -QAM) over independent and non-identical Nakagami-m channels and Rician fading channels. The approximated closed-form expression of ergodic capacity is derived for both Nakagami-m and Rician fading channels. The performance of the system is analyzed at various relay locations. The theoretical results are then compared with the simulation results obtained for binary PSK, quadrature PSK, and 16-QAM modulation schemes to verify the analysis. Here, the expressions derived can be easily and more efficiently used to compute the performance parameters than doing Monte Carlo simulations. It is shown that cooperation is significant only for low K values for Rician by plotting cooperation gain versus K. The results show that the cooperative network performs best when the relay is located in the middle of source to destination link, at lower SNR values, and the performance of the system is worst if the relay is located closer to the source than to the destination.

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“…[5] Also, the operation of the vehicles such as acceleration and braking has an impact on the magnitude and direction of the stray current. [6] In extreme cases, the intensity of the current that leaks from rails can reach up to 70-80% of the traction system current intensity.…”

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confidence: 99%

Estimating harmful effect of dynamic stray currents on pipeline by simultaneous multiparametric field measurements, continuous wavelet cross‐correlation analysis, and frequency plots

Mujezinović

Martinez²,

Kekez³

2018

Materials & Corrosion

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This paper presents the detection method and analysis methodology of dynamic stray current effects on underground pipelines based on simultaneous multiparametric measurements in combination with continuous wavelet cross‐correlation and frequency plots. Measurements presented within this paper were conducted at two locations experiencing tram induced dynamic stray currents, in the first case, on unprotected pipeline and in the second case, on pipeline under cathodic protection. On both pipelines, measurements of pipe‐to‐soil potential, lateral potential gradient, corrosion probe current, and pipeline current were simultaneously done for time period of 20 min. For both locations, the two wavelet cross‐correlation spectrograms for the quantities: lateral potential gradient and probe current versus pipe‐to‐soil potential show that 5% statistical significance levels are in periods between 16 and 128 s. Time spans and period lengths of observed cross‐correlations on spectrograms reflect the stray current influence that may be linked to specific events, such as passing of trams. On the other hand, frequency plots of the measured quantities give clear visual representation of the time that pipeline spends in a certain state related to the possible harmful effect of stray current and also show the degree of cathodic protection beneficial effect.

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Performance Analysis of Cooperative Cellular Relaying Networks

Cited by 6 publications

References 21 publications

Coordinated Tethering for Multi-RAT Cellular Networks: An Algorithmic Solution and Performance Analysis

Coordinated Tethering for Multi-RAT Cellular Networks: An Algorithmic Solution and Performance Analysis

Performance analysis of cooperative network over Nakagami and Rician fading channels

Estimating harmful effect of dynamic stray currents on pipeline by simultaneous multiparametric field measurements, continuous wavelet cross‐correlation analysis, and frequency plots

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