Impact of Double-Rayleigh Fading on System Performance

Salo, J.; El-Sallabi, H.M.; Vainikainen, P.

doi:10.1109/iswpc.2006.1613574

Cited by 60 publications

(53 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If both the transmitter and the receiver are moving and the number of scatterers around each of them is large, a keyhole channel is created and the fading envelope follows a double Rayleigh distribution [6], [7]. It has been shown in [8] that the severity of fading is larger for double Rayleigh channels compared to the classical Rayleigh channel. Therefore, it is highly important to propose communication techniques which can improve the link reliability over double Rayleigh channels.…”

Section: Introductionmentioning

confidence: 99%

Throughput and Delay Analysis of HARQ With Code Combining Over Double Rayleigh Fading Channels

Chelli

Zedini

Alouini

et al. 2018

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

Abstract-This paper proposes the use of hybrid automatic repeat request (HARQ) with code combining (HARQ-CC) to offer reliable communications over double Rayleigh channels. The double Rayleigh fading channel is of particular interest to vehicle-to-vehicle communication systems as well as amplify-andforward relaying and keyhole channels. This work studies the performance of HARQ-CC over double Rayleigh channels from an information theoretic perspective. Analytical approximations are derived for the -outage capacity, the average number of transmissions, and the throughput of HARQ-CC. Moreover, we evaluate the delay experienced by Poisson arriving packets for HARQ-CC. We provide analytical expressions for the average waiting time, the packets sojourn time, the average consumed power, and the energy efficiency. In our investigation, we take into account the impact of imperfect feedback on different performance metrics. Additionally, we explore the tradeoff between energy efficiency and the throughput. The proposed scheme is shown to maintain the outage probability below a specified threshold which ensures the link reliability. Meanwhile, HARQ-CC adapts implicitly the transmission rate to the channel conditions such that the throughput is maximized. Our results demonstrate that HARQ-CC allows improving the achievable communication rate compared to fixed time diversity schemes. To maximize the throughput of HARQ-CC, the rate per HARQ round should be less than the rate required to meet the outage constraint. Our investigation of the performance of HARQ-CC over Rayleigh and double Rayleigh channels shows that double Rayleigh channels have a higher severity of fading and result in a larger degradation of the throughput. Our analysis reveals that HARQ with incremental redundancy (HARQ-IR) achieves a larger throughput compared to HARQ-CC, while HARQ-CC is simpler to implement, has a lower decoding complexity, and requires less memory resources.Index Terms-Vehicle-to-vehicle communications, double Rayleigh channel, hybrid automatic repeat request (HARQ), code combining, throughput, delay analysis, energy efficiency, information outage capacity.

show abstract

Section: Introductionmentioning

confidence: 99%

Throughput and Delay Analysis of HARQ With Code Combining Over Double Rayleigh Fading Channels

Chelli

Zedini

Alouini

et al. 2018

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

show abstract

“…This in turn leads to the fact that the proposed model is highly flexible, since we expect that its statistics can be fitted to measurement data. The PDF p (x) of MLSS processes (t) described by (15) is presented in Fig. 2 as well as the simulation results obtained by evaluating the statistics of the waveforms generated by using the SOS-based channel simulator.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…However, the information provided by the PDF can also be summarized with the help of the expected value (mean value) and the variance of the stochastic process. The expected value m of MLSS processes (t) can be obtained by substituting (15) …”

Section: Mean Value and Variance Of Mlss Processesmentioning

confidence: 99%

“…A detailed analysis on the statistics of double Rayleigh channels is presented in [14]. The authors of [15] have addressed the impact of double Rayleigh fading on the systems performance. Furthermore, motivated by the studies of double Rayleigh fading channels for keyhole channels [16], the so-called double Nakagami-m and cascaded Weibull fading channels have been proposed in [17] and [18], respectively.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mobile-to-mobile fading channels in amplify-and-forward relay systems under line-of-sight conditions: statistical modeling and analysis

Talha

Pätzold

2010

Ann. Telecommun.

View full text Add to dashboard Cite

This paper deals with the modeling and analysis of narrowband mobile-to-mobile (M2M) fading channels for amplify-and-forward relay links under line-of-sight (LOS) conditions. It is assumed that a LOS component exists in the direct link between the source mobile station (SMS) and the destination mobile station (DMS), as well as in the links via the mobile relay (MR). The proposed channel model is referred to as the multiple-LOS second-order scattering (MLSS) channel model. The MLSS channel model is derived from a second-order scattering process, where the received signal is modeled in the complex baseband as the sum of a single and a double scattered component. Analytical expressions are derived for the mean value, variance, probability density function (PDF), cumulative distribution function (CDF), level-crossing rate (LCR), and average duration of fades (ADF) of the received envelope of MLSS channels. The PDF of the channel phase is also investigated. It is observed that the LOS components and the relay gain have a significant influence on the statistics of MLSS channels. It is also shown that MLSS channels include various other channel models as special cases, e.g., double Rayleigh channels, double Rice channels, single-LOS doublescattering (SLDS) channels, non-line-of-sight (NLOS) second-order scattering (NLSS) channels, and single-LOS second-order scattering (SLSS) channels. The correctness of all analytical results is confirmed by simulations using a high performance channel simulator. Our novel MLSS channel model is of significant importance for the system level performance evaluation of M2M communication systems in different M2M propagation scenarios. Furthermore, our studies pertaining to the fading behavior of MLSS channels are useful for the design and development of relay-based cooperative wireless networks.

show abstract

“…Hence, the envelope of the overall amplify-and-forward relay fading channel follows the double Rayleigh distribution [8]. Questions like how does the double Rayleigh fading impact the systems' performance are answered in [9]. However, there is still a lack of information about amplify-and-forward relay fading channels under LOS conditions.…”

Section: Introductionmentioning

confidence: 99%

Statistical Modeling and Analysis of Mobile-to-Mobile Fading Channels in Cooperative Networks Under Line-of-Sight Conditions

Talha

Pätzold

2009

Wireless Pers Commun

View full text Add to dashboard Cite

Recently, mobile-to-mobile (M2M) cooperative network technology has gained considerable attention for its promise of enhanced system performance with increased mobility support. As this is a new research field, little is known about the statistical properties of M2M fading channels in cooperative networks. So far, M2M fading channels have mainly been modeled under the assumption of non-line-of-sight (NLOS) conditions. In this paper, we propose a new model for M2M fading channels in amplify-and-forward relay links, where it is assumed that a line-of-sight (LOS) component exists in the direct link between the source mobile station and the destination mobile station. Analytical expressions will be derived for the main statistical quantities of the channel envelope, such as the mean value, variance, probability density function (PDF), level-crossing rate (LCR), and average duration of fades (ADF) as well as the channel phase. Our results show that the statistical properties of the proposed M2M channel are quite different from those of double Rayleigh and double Rice channels. In addition, a high-performance channel simulator will be presented for the new M2M channel model. The developed channel simulator is used to confirm the correctness of all obtained theoretical results by simulations.

show abstract

Impact of Double-Rayleigh Fading on System Performance

Cited by 60 publications

References 7 publications

Throughput and Delay Analysis of HARQ With Code Combining Over Double Rayleigh Fading Channels

Throughput and Delay Analysis of HARQ With Code Combining Over Double Rayleigh Fading Channels

Mobile-to-mobile fading channels in amplify-and-forward relay systems under line-of-sight conditions: statistical modeling and analysis

Statistical Modeling and Analysis of Mobile-to-Mobile Fading Channels in Cooperative Networks Under Line-of-Sight Conditions

Contact Info

Product

Resources

About