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.

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 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 On Secrecy Outage Probability for Downlink NOMA Systems With Relay-Antenna Selection

2021 ◽  
Author(s):  
Shu Xu ◽  
Chen Liu ◽  
Hong Wang ◽  
Mujun Qian ◽  
Wenfeng Sun
Keyword(s):  
Outage Probability ◽  
Multiple Access ◽  
Antenna Selection ◽  
Maximal Ratio Combining ◽  
Selection Combining ◽  
Secrecy Outage Probability ◽  
Channel State ◽  
Secrecy Outage ◽  
Secure Transmission ◽  
Theoretical Results

Abstract Secure transmission is essential for future non-orthogonal multiple access (NOMA) system. This paper investigates relay-antenna selection (RAS) to enhance physical-layer security (PLS) of cooperative NOMA system in the presence of an eavesdropper, where multiple antennas are deployed at the relays, the users, and the eavesdropper. In order to reduce expense on radio frequency (RF) chains, selection combining (SC) is employed at both the relays and the users, whilst the eavesdropper employs either maximal-ratio combining (MRC) or selection combining (SC) to process the received signals. Under the condition that the channel state information (CSI) of the eavesdropping channel is available or unavailable, two e↵ective relay-antenna selection schemes are proposed. Additionally, the closed-form expressions of secrecy outage probability (SOP) are derived for the proposed relay-antenna selection schemes. In order to gain more deep insights on the derived results, the asymptotic performance of the derived SOP is analyzed. In simulations, it is demonstrated that the theoretical results match well with the simulation results and the SOP of the proposed schemes is less than that of the conventional orthogonal multiple access (OMA) scheme obviously.

scholarly journals Outage probability analysis of dual energy harvesting relay network over rayleigh fading channel using SC and MRC technique

2019 ◽  
Vol 16 (2) ◽  
pp. 803
Author(s):  
Tan N. Nguyen ◽  
Minh Tran ◽  
Van-Duc Phan ◽  
Tran Thanh Trang
Keyword(s):  
Energy Harvesting ◽  
Outage Probability ◽  
Fading Channel ◽  
Rayleigh Fading ◽  
Dual Energy ◽  
Rayleigh Fading Channel ◽  
Maximal Ratio Combining ◽  
Relay Network ◽  
Closed Form Expression ◽  
Form Expression

<p><span>In this paper, the system model of dual-energy harvesting relay network over Rayleigh fading channel and the comparison between Selecting Combining (SC) and Maximal Ratio Combining (MRC) technique cases are proposed and investigated. The closed-form expression of the outage probability for the SC case and the integral-form expression of the outage probability for MRC case is derived. Moreover, the influence of the main parameters on the system performance is demonstrated entirely by the Monte Carlo simulation. From the results, we can see that all simulation and analytical results match well with each other.</span></p>

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