scholarly journals Analysis of Device-to-Device Communication over Double-Generalized Gamma Channels

2018 ◽  
Vol 8 (4) ◽  
pp. 3265-3269 ◽  
Author(s):  
Z. Hussain ◽  
A. ur R. Khan ◽  
H. Mehdi ◽  
S. M. A. Saleem
Keyword(s):  
Fading Channels ◽  
Communication System ◽  
Path Loss ◽  
Symbol Error Rate ◽  
D2d Communication ◽  
Cumulative Distribution ◽  
Channel Fading ◽  
Statistical Parameters ◽  
Generalized Gamma ◽  
Device To Device

In this paper, performance of a device-to-device (D2D) communication system is analyzed over double-generalized Gamma (dGG) fading channels. The dGG is a generic distribution for modeling double-scattering fading conditions. Co-channel interference (CCI) caused by various wireless devices in the system is also considered. The CCI fading channel is assumed to be Nakagami distributed. Analytical expressions for important statistical metrics, i.e. probability density function (PDF) and cumulative distribution function (CDF) of signal-to-interference ratio (SIR), are presented. Based on these statistical parameters, expressions for the outage probability, channel capacity and symbol error rate (SER) of the D2D communication system are presented. The performance of D2D system is then discussed and analyzed with the help of numerical results with arbitrary channel fading, path-loss and interference conditions.

scholarly journals Analysis of D2D Communications over Gamma/Nakagami Fading Channels

2018 ◽  
Vol 8 (2) ◽  
pp. 2693-2698
Author(s):  
Z. Hussain ◽  
A. ur R. Khan ◽  
H. Mehdi ◽  
S. M. A. Saleem
Keyword(s):  
Fading Channels ◽  
Channel Capacity ◽  
Communication System ◽  
Communication Systems ◽  
Path Loss ◽  
Symbol Error Rate ◽  
D2d Communication ◽  
Channel Fading ◽  
Nakagami Fading Channels ◽  
Probability Density Function Pdf

In this paper, we investigate the outage probability, channel capacity and symbol error rate (SER) performance of device-to-device (D2D) communication systems. The D2D communication system is affected by several co-channel interferers. Gamma fading channel is considered for the D2D communication system. The channel for the co-channel interference is assumed to be Nakagami faded. An expression for the probability density function (PDF) of the signal-to-interference ratio (SIR) is presented. The PDF is a function of distances between various devices in the D2D system, path-loss, channel fading conditions and signal powers. Based on the PDF expression, we present the expressions for the outage, channel capacity and SER. With the help of numerical results the performance of D2D communication system is discussed under various conditions of interference, path-loss and channel fading.

scholarly journals Analysis of D2D Communication System Over κ-μ Shadowed Fading Channel

2018 ◽  
Vol 8 (5) ◽  
pp. 3405-3410
Author(s):  
Z. Hussain ◽  
A. ur R. Khan ◽  
H. Mehdi ◽  
S. M. A. Saleem
Keyword(s):  
Outage Probability ◽  
Communication System ◽  
Fading Channel ◽  
Success Probability ◽  
Path Loss ◽  
D2d Communication ◽  
Maximal Ratio Combining ◽  
Selection Combining ◽  
Channel Fading ◽  
Shadowed Fading

Outage performance of a device-to-device (D2D) communication system in the presence of co-channel interference (CCI) is analyzed in this paper. Channels for the D2D and CCI signals are assumed to be κ-μ shadowed faded. Maximal ratio combining (MRC) and selection combining (SC) techniques are considered to combat fading conditions. Characteristic function (CF) expression of the D2D system in the presence of CCI is presented. Outage probability and success probability expressions are presented for the MRC and SC schemes. These outage probability and success probability expressions are functions of various CCI, path-loss and channel fading parameters. With the help of numerical results, effects of CCI on the performance of D2D communication system under different channel fading and path-loss conditions are discussed.

Reconfigurable Antenna Beamforming in Device to Device Communication

2015 ◽  
Vol 740 ◽  
pp. 819-822
Author(s):  
Qing Shen ◽  
Tian Tian Guo ◽  
Yao Zhi Du
Keyword(s):  
Communication System ◽  
Signal Transmission ◽  
Cellular Communication ◽  
D2d Communication ◽  
System Capacity ◽  
Reconfigurable Antenna ◽  
Device To Device ◽  
Device To Device Communication

Device-to-Device (D2D) communication allows user devices in proximity to directly communicate with each other through reusing resources in cellular communication system. D2D improves the system capacity while it also raises some challenges on interference. This paper adopts reconfigurable antenna in D2D communication generating directional signal transmission between D2D pairs which mitigates the interference to other users. The simulations show that such scheme improve the system capacity compared to the traditional one.

Dual-Hop Fixed Gain Relaying Transmissions with Semi-Blind in Asymmetric Multipath/Shadowing Fading Channels

2015 ◽  
Vol 9 (1) ◽  
pp. 82-90
Author(s):  
Weijun Cheng ◽  
Teng Chen
Keyword(s):  
Fading Channels ◽  
Cumulative Distribution Function ◽  
Signal To Noise Ratio ◽  
Ergodic Capacity ◽  
Moment Generating Function ◽  
Symbol Error Rate ◽  
Cumulative Distribution ◽  
Simulation Results ◽  
End To End ◽  
The Moment

In this paper, we investigate the end-to-end performance of a dual-hop fixed gain relaying system with semiblind relay under asymmetric fading environments. In such environments, the wireless links of the considered system undergo asymmetric multipath/shadowing fading conditions, where one link is subject to only the Nakagami-m fading, the other link is subject to the composite Nakagami-lognormal fading which is approximated by using mixture gamma fading model. First, the cumulative distribution function (CDF), the moment generating function (MGF) and the moments of the end-to-end signal-to-noise ratio (SNR) are derived under two asymmetric scenarios. Then, novel closed-form expressions of the outage probability, the average end-to-end SNR, the symbol error rate and the ergodic capacity for the dual-hop system are obtained based on the CDF and the MGF, respectively. Finally, some numerical and simulation results are shown and discussed to validate the accuracy of the analytical results under different scenarios, such as varying average SNR, fading parameters per hop, the choice of the semi-blind gain and the location of relaying nodes.

Symbol error rate of MIMO single and double-Weibull fading channels with OSTBC and MRC

2018 ◽  
Vol 15 (4) ◽  
pp. 498-504 ◽  
Author(s):  
Keerti Tiwari ◽  
Davinder S. Saini ◽  
Sunil V. Bhooshan
Keyword(s):  
Fading Channels ◽  
Error Rate ◽  
Symbol Error Rate ◽  
Higher Order ◽  
Cumulative Distribution ◽  
Rate Performance ◽  
Weibull Fading ◽  
Content Type ◽  
Analytical Results ◽  
Weibull Fading Channels

Purpose This paper aims to exploit an orthogonal space-time block code (OSTBC) and maximal ratio combining (MRC) techniques to evaluate error rate performance of multiple-input multiple-output system for different modulation schemes operating over single- and double-Weibull fading channels. Design/methodology/approach The authors provided a novel analytical expression for cumulative distribution function (CDF) of double-Weibull distribution in the form of Meijer-G function. They also evaluated probability density function (PDF) and CDF for single- and double-Weibull random variables. CDF-based closed-form expressions of symbol error rate (SER) are computed for the proposed systems’ design. Findings Based on simulation and analytical results, the authors have shown that double-Weibull fading which shows the cascaded nature of channel gives significantly poor SER performance compared to that of single-Weibull fading. Moreover, MRC offers an improved error rate performance compared to that of OSTBC. As the fading parameter increases for any modulation technique, the required signal-to-noise ratio (SNR) gap between single- and double-Weibull fading decreases. Finally, it is observed that the analytical results are a good approximation to simulation results. Practical implications For practical implication, the authors use a number of antennas at the base station, but solely to maximize performance, one can use receive diversity, i.e. MRC. Originality/value Using higher-order modulation (i.e. 16-QAM), 4 and 1 dB less SNR is required at high and less fading, respectively, in single-Weibull fading as compared to double-Weibull fading. Hence, at higher-order modulation, double-Weibull channel model performs better as compared to lower-order modulation.

Device-to-Device Radio Link Analysis at 2.4, 3.4, 5.2, 28 and 60 GHz in Indoor Communication Environments

Frequenz ◽  
2019 ◽  
Vol 73 (3-4) ◽  
pp. 131-141
Author(s):  
A. G. Sreedevi ◽  
T. Rama Rao ◽  
M. Susila
Keyword(s):  
Research Work ◽  
Path Loss ◽  
D2d Communication ◽  
Radio Link ◽  
Indoor Environments ◽  
60 Ghz ◽  
International Telecommunication Union ◽  
Performance Improvements ◽  
Device To Device ◽  
The Impact

Abstract Device-to-device (D2D) communication has become one of the major areas of research ever since the industry was advancing to LTE and 5G. In this nascent stage of transformation, this research work characterizes the radio link behavior of D2D communication network in an indoor environment utilizing licensed and unlicensed band experiments and ray-tracing based simulations at frequencies of 2.4, 3.4, 5.2, 28 and 60 GHz. The path loss exponent (PLE) and standard deviation are estimated and compared with free space path loss (FSPL), log normal shadowing (LNS), International Telecommunication Union (ITU) model and also, compared with other research works. This work also studied the impact of indoor environments on D2D communications along with link budget, channel capacities and required performance improvements.

scholarly journals Physical Layer Intercept Probability in Wireless Sensor Networks over Fisher–Snedecor ? Fading Channels

Electronics ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 1368
Author(s):  
Srđan Maričić ◽  
Nenad Milošević ◽  
Dejan Drajić ◽  
Dejan Milić ◽  
Jelena Anastasov
Keyword(s):  
Fading Channels ◽  
Path Loss ◽  
Physical Layer ◽  
Cumulative Distribution ◽  
Wireless Sensor ◽  
Active Sensors ◽  
Signal Ratio ◽  
Wiretap Channel ◽  
Intercept Probability ◽  
The Impact

In this paper, we analyze the physical layer security (PLS) of an arbitrarily dimensioned wireless sensor network (WSN) in the presence of an unauthorized attacker. Various scheduling schemes have been exploited in order to enhance the secure transmission of reliable links impaired by Fisher–Snedecor F fading. The path loss among active nodes is also considered. The exact intercept probability expressions are derived recalling an optimal scheduling scheme (OS), a scheduling policy based on a specific cumulative distribution function (CS), and round-robin scheduling as a baseline. The asymptotic behavior of the intercept metric is also presented in a simpler form with acceptable accuracy. The secrecy diversity orders are defined and the security–reliability tradeoff of WSN is specified. Numerical results are provided to demonstrate the interplay of various main/wiretap channel conditions, the distances among nodes, the number of active sensors, and the average main-to-eavesdropper’s signal ratio in order to upgrade the quality of the WSN secrecy performance. Additionally, the impact of the outage probability on the intercept probability is defined for a variety of scenarios under which either the CS or OS scheme could be selected as suitable for PLS enhancement. The obtained results are verified by independent Monte Carlo simulations.

Electronic relay performance in the inband device-to-device (D2D) communication system

2019 ◽  
Vol 72 (1) ◽  
pp. 29-39 ◽  
Author(s):  
Rna Ghallab ◽  
Ali A. Sakr ◽  
Mona Shokair ◽  
Atef Abou El-Azm
Keyword(s):  
Communication System ◽  
D2d Communication ◽  
Electronic Relay ◽  
Device To Device
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