scholarly journals BEP/SEP and Outage Performance Analysis of -Branch Maximal-Ratio Combiner for Fading

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
Mirza Milišić ◽  
Mirza Hamza ◽  
Mesud Hadžialić
Keyword(s):  
Outage Probability ◽  
Fading Channels ◽  
Error Probability ◽  
Broad Class ◽  
Cumulative Distribution ◽  
Maximal Ratio Combiner ◽  
Model Probability ◽  
Long Time ◽  
Probability Density Function Pdf ◽  
Number Of Branches

Maximal-ratio combiner (MRC) performances in fading channels have been of interest for a long time, which can be seen by a number of papers concerning this topic. In this paper we treat bit error probability (BEP), symbol error probability (SEP) and outage probability of MRC in presence of fading. We will present fading model, probability density function (PDF), and cumulative distribution function (CDF). We will also present PDF, CDF, and outage probability of theL-branch MRC output. BEP/SEP will be evaluated for broad class of modulation types and for coherent and noncoherent types of detection. BEP/SEP and outage performances of the MRC will be evaluated for different number of branches via Monte Carlo simulations and theoretical expressions.

scholarly journals Performance of Dual-Hop Relaying Over Shadowed Ricean Fading Channels

2011 ◽  
Vol 62 (4) ◽  
pp. 244-248 ◽  
Author(s):  
Aleksandra Cvetković ◽  
Jelena Anastasov ◽  
Stefan Panić ◽  
Mihajlo Stefanović ◽  
Dejan Milić
Keyword(s):  
Lower Bound ◽  
Fading Channels ◽  
Cumulative Distribution Function ◽  
Numerical Results ◽  
Cumulative Distribution ◽  
Performance Gain ◽  
Channel State ◽  
Ricean Fading ◽  
Average Bit Error Probability ◽  
Probability Density Function Pdf

Performance of Dual-Hop Relaying Over Shadowed Ricean Fading Channels In this paper, an analytical approach for evaluating performance of dual-hop cooperative link over shadowed Ricean fading channels is presented. New lower bound expressions for the probability density function (PDF), cumulative distribution function (CDF) and average bit error probability (ABEP) for system with channel state information (CSI) relay are derived. Some numerical results are presented to show behavior of performance gain for the proposed system. Analytical exact and lower bound expression for the outage probability (OP) of CSI assisted relay are obtained and required numerical results are compared.

scholarly journals Performance Analysis of 5G Transmission over Fading Channels with Random IG Distributed LOS Components

2017 ◽  
Vol 2017 ◽  
pp. 1-4
Author(s):  
Dejan Jaksic ◽  
Risto Bojovic ◽  
Petar Spalevic ◽  
Dusan Stefanovic ◽  
Slavisa Trajkovic
Keyword(s):  
Closed Form ◽  
Fading Channels ◽  
Cumulative Distribution ◽  
Component Ratio ◽  
Transmission Parameters ◽  
Inverse Gamma ◽  
Level Crossing Rate ◽  
Distributed Process ◽  
Random Nature ◽  
Probability Density Function Pdf

Mathematical modelling of the behavior of the radio propagation at mmWave bands is crucial to the development of transmission and reception algorithms of new 5G systems. In this study we will model 5G propagation in nondeterministic line-of-sight (LOS) conditions, when the random nature of LOS component ratio will be observed as Inverse Gamma (IG) distributed process. Closed-form expressions will be presented for the probability density function (PDF) and cumulative distribution function (CDF) of such random process. Further, closed-form expressions will be provided for important performance measures such as level crossing rate (LCR) and average fade duration (AFD). Capitalizing on proposed expressions, LCR and AFD will be discussed in the function of transmission parameters.

scholarly journals On the Performance of Cognitive Underlay SIMO Networks over Equally Correlated Rayleigh Fading Channels

2016 ◽  
Vol 5 (1-2) ◽  
Author(s):  
Tu Lam Thanh ◽  
Vo Nguyen Quoc Bao ◽  
Pham Thi Dan Ngoc ◽  
Tran Trung Duy
Keyword(s):  
Fading Channels ◽  
Spectrum Sharing ◽  
Rayleigh Fading ◽  
Ergodic Capacity ◽  
Cumulative Distribution ◽  
Rayleigh Fading Channels ◽  
Input Multiple Output ◽  
Single Input ◽  
Close Form ◽  
Probability Density Function Pdf

The performance of single-input multiple-output (SIMO) cognitive spectrum sharing networks with the presence of equally correlated Rayleigh fading channels is investigated. In particular, based on the truncated infinitive series of cumulative distribution function (CDF) and probability density function (PDF) of the end-to-end signal-to-noise ratios (SNRs), close-form expressions are provided for the system outage performance, bit error rate and ergodic capacity. It is shown that the system performance merely depends on the correlation coefficient between antennas. Monte-Carlo simulations are also contributed to confirm the accuracy of our analysis.

Study on the Nth Best Relay Selection over Nakagami-m Fading Channels

2013 ◽  
Vol 347-350 ◽  
pp. 1561-1565
Author(s):  
Yu Hua Ouyang ◽  
Xiang Dong Jia
Keyword(s):  
Fading Channels ◽  
Relay Selection ◽  
Cumulative Distribution Function ◽  
Signal To Noise Ratio ◽  
Ergodic Capacity ◽  
Cumulative Distribution ◽  
Opportunistic Relaying ◽  
Best Relay Selection ◽  
Error Ratio ◽  
Probability Density Function Pdf

We study the Nth best relay selection schemes over independent and non-identically distributed (i.ni.d) Nakagami-m fading channels. For such opportunistic relaying schemes, we first obtain the closed-form expressions to the probability density function (PDF) and cumulative distribution function (CDF) of the instantaneous end-to-end signal-to-noise ratio (SNR). Then, with the obtained CDF and PDF, three main measurements are investigated, i.e., outage probability, average symbol error ratio (SER), and ergodic capacity. The numerical results show that the simulations match derivations exactly.

scholarly journals Performance Analysis of Multi-Antenna Relay Networks over Nakagami-m Fading Channel

2013 ◽  
pp. 242-255
Author(s):  
E. Soleimani-Nasab ◽  
A. Kalantari ◽  
M. Ardebilipour
Keyword(s):  
Outage Probability ◽  
Fading Channels ◽  
Fading Channel ◽  
Error Probability ◽  
Signal To Noise Ratio ◽  
Relay Networks ◽  
Function Symbol ◽  
Statistical Characteristics ◽  
Decode And Forward ◽  
Analytical Formulas

In this chapter, the authors present the performance of multi-antenna selective combining decode-and-forward (SC-DF) relay networks over independent and identically distributed (i.i.d) Nakagami-m fading channels. The outage probability, moment generation function, symbol error probability and average channel capacity are derived in closed-form using the Signal-to-Noise-Ratio (SNR) statistical characteristics. After that, the authors formulate the outage probability problem, optimize it with an approximated problem, and then solve it analytically. Finally, for comparison with analytical formulas, the authors perform some Monte-Carlo simulations.

scholarly journals On the Performance Analysis of Switched Diversity Combining Receivers over Fisher–Snedecor ℱ Composite Fading Channels

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3014
Author(s):  
Weijun Cheng ◽  
Xiaoting Wang ◽  
Tengfei Ma ◽  
Gang Wang
Keyword(s):  
Fading Channels ◽  
Error Probability ◽  
Signal To Noise Ratio ◽  
Multipath Fading ◽  
Performance Criteria ◽  
Statistical Characteristics ◽  
Diversity Combining ◽  
Systematic Analysis ◽  
Average Bit Error Probability ◽  
Switched Diversity Combining

In some emerging wireless applications, such as wearable communication and low-power sensor network applications, wireless devices or nodes not only require simple physical implementation approaches but also require certain reliable receiver techniques to overcome the effects of multipath or shadowed fading. Switched diversity combining (SDC) systems could be a simple and promising solution to the above requirements. Recently, a Fisher–Snedecor ℱ composited fading model has gained much interest because of its modeling accuracy and calculation tractability. However, the performance of SDC systems over ℱ fading channels has not yet been analyzed in the open literature. To this end, this paper presents a systematic analysis of SDC systems over ℱ fading channels, including dual-branch switch-and-stay combining (SSC), multibranch switch-and examine combining (SEC), and SEC with post-examining selection (SECps) systems. We first investigate the statistical characteristics of univariate and bivariate ℱ distributions. Then, these statistical expressions are introduced into the above SDC systems and the statistical metrics of the output signal-to-noise ratio (SNR) for these systems are deduced in different ℱ fading scenarios. Thirdly, certain exact and novel expressions of performance criteria, such as the outage probability, the average bit error probability and average symbol error probability, as well as the average channel capacity for SSC, SEC, and SECps are derived. To find the optimum performance, optimal analysis is performed for the independent and identically distributed cases. Finally, numerical evaluation and simulations are carried out to demonstrate the validity of the theoretical analysis under various ℱ fading scenarios. According to the obtained results, the multipath fading parameter has more influence on the performance of SDC systems than the shadowing parameter, the correlation coefficient, or the average SNR. Importantly, the SDC systems can provide switched diversity gains only when the switching threshold is not too large or too small compared to the average SNR.

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