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average symbol error probability of Interference-Limited Multiuser Hybrid Satellite-Terrestrial Relay Networks with Outdated Channel State Information

Average Symbol Error Probability of Interference-Limited Mul...

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IEEE Region 10 Conference on Technology, Knowledge, and Society (TENCON)

作者： Bankey, Vinay Upadhyay, Prabhat K. Indian Inst Technol Indore Discipline Elect Engn Indore 453552 Madhya Pradesh India

ISBN: (纸本)9781728118956

A downlink multi-user hybrid satellite-terrestrial relay network (HSTRN) is considered in this paper, where a multi-antenna satellite communicates with the multiple terrestrial users via an interference-limited amplify-and-forward relay. For this network, we investigate the average symbol error probability (SEP) performance by employing opportunistic scheduling of multiple ground users with outdated channel state information (CSI) of the pertaining channels and considering co-channel interference (CCI) at the relay. Specifically, we derive closedform analytical and asymptotic expressions of the average SEP for the considered network. Further, numerical and Monte-Carlo simulation results are implemented to vindicate the accuracy of our hypothesis as well as to demonstrate the influence of outdated CSI, CCI, and various channel/system parameters on the system performance. Our analysis provides useful trends in the design of HSTRNs for future wireless communication systems.

关键词： Amplify-and-forward average symbol error probability co-channel interference HSTRN multi-user

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A New Approximation for average symbol error probability over Log-Normal Channels

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IEEE WIRELESS COMMUNICATIONS LETTERS 2014年第1期3卷 58-61页

作者： Khandelwal, Vineet Karmeshu Jawaharlal Nehru Univ Sch Comp Syst & Sci New Delhi 110067 India

The average symbol error probability(ASEP) is an important measure to evaluate the performance of different modulation techniques over fading channels. The phenomenon of both shadowing and slow fading in wireless communication system is generally characterized by log-normal probability distribution. Approximating log-normal integrals by constructing Taylor series expansion of second order, a simple tight closed-form approximation for ASEP over log-normal fading channel is derived. This expression facilitates the computation of average symbol error rate for a broader class of coherent digital modulation schemes. The efficiency of the expression is numerically examined and comparison of the results is carried out in relation to the existing approximate expressions.

关键词： average symbol error probability log-normal distribution fading channels Q bounds Taylor's approximation coherent digital modulation techniques

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Analyzing ASEP with imperfect-phase error and various modulation schemes on IRS-aided wireless network over κ-μ fading channel

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ETRI JOURNAL 2025年第1期47卷 59-68页

作者： Ranjan, Rajnish Kumar Chowdhury, Atanu Ghoshal, Dibyendu Natl Inst Technol Dept Elect & Commun Engn Agartala Tripura India

Next-generation wireless systems constitute a promising technology, and intelligent reflecting surface (IRS)-aided mobile communications can be used to design and simulate a smart and flexible radio environment. We examine the average symbol error probability (ASEP) on an IRS-aided wireless network over a kappa-mu fading channel with imperfect phase error. In addition, the ASEP for non-coherent M-ary frequency shift keying, M-ary phase shift keying, and M-ary differential phase shift keying on an IRS-aided wireless network over a kappa-mu fading channel are analyzed. Furthermore, exact closed-form mathematical expressions for ASEP across different modulation schemes including ASEP with imperfect phase error are derived. The accuracy of the derived expressions is validated through simulations. The system effectiveness is comprehensively examined, uncovering valuable insights into channel fading values and the number of reflecting components.

关键词： average symbol error probability imperfect-phase error intelligent reflecting surface modulation scheme kappa-mu fading channel

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Multiple RISs-Aided Networks: Performance Analysis and Optimization

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2023年第6期72卷 7545-7559页

作者： Aldababsa, Mahmoud Salhab, Anas M. Nasir, Ali Arshad Samuh, Monjed H. da Costa, Daniel Benevides Nisantasi Univ Dept Elect & Elect Engn TR-34481742 Istanbul Turkiye King Fahd Univ Petr & Minerals Dept Elect Engn Dhahran 31261 Saudi Arabia King Fahd Univ Petr & Minerals Ctr Commun Syst & Sensing Dhahran 31261 Saudi Arabia Palestine Polytech Univ Dept Appl Math & Phys Hebron 90100 Palestine Technol Innovat Inst Abu Dhabi 9639 U Arab Emirates

This paper analyzes the performance of multiple re configurable intelligent surfaces (RISs)-aided networks with opportunistic RIS scheduling. The paper also provides some optimization results on the number of reflecting elements on RISs and the optimal placement of RISs. We first derive accurate closed-form approximations for RIS channels' distributions assuming independent non-identically distributed (***.d.) Nakagami-m fading environment. Then, the approximate expressions for outage probability (OP) and average symbol error probability (ASEP) are derived in closed-form. Furthermore, to get more insights into the system performance, we derive the asymptotic OP at the high signal-to-noise ratio (SNR) regime and provide closed-form expressions for the system diversity order and coding gain. Finally, the accuracy of our theoretical analysis is validated through Monte-Carlo simulations. The obtained results show that the considered RIS scenario can provide a diversity order of a/2 K, where a is a function of the Nakagami fading parameter m and the number of meta-surface elements N, and K is the number of RISs.

关键词： Reconfigurable intelligent surface optimization Nakagami-m fading outage probability average symbol error probability

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Extremely Accurate, Generic and Tractable Exponential Bounds for the Gaussian Q Function With Applications in Communication Systems

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IEEE COMMUNICATIONS LETTERS 2023年第7期27卷 1724-1728页

作者： Powari, Aditya Sadhwani, Dharmendra Univ Manchester Dept Elect & Elect Engn Manchester M13 9PL England Inst Infrastruct Technol Res & Management IITRAM Dept Elect & Comp Sci Engn Ahmadabad 380026 India

In this letter, we apply the Fejer's Rule of interpolatory integration in a modified manner to obtain a very generic, tractable and extremely accurate approximation for the Gaussian Q function. We further show the utility of the proposed approximation by simplifying the error performance metrics like average symbol error probability (ASEP) of popular digital modulation techniques over a very useful kappa- mu shadowed fading channel. This eliminates the need of mathematical softwares which require very high processing power (a constraint at the receiver side) yielding simplified and cost effective receiver's design. In addition, an insight on the asymptotic ASEP (and diversity order thereof) is also highlighted in this letter.

关键词： Gaussian Q function wireless communication digital modulation average symbol error probability kappa - mu shadowed fading channel communication theory

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On Performance of Low-Power Wide-Area Networks With the Combining of Reconfigurable Intelligent Surfaces and Relay

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IEEE TRANSACTIONS ON MOBILE COMPUTING 2023年第10期22卷 6086-6096页

作者： Tran, Phuong T. Nguyen, Ba Cao Hoang, Tran Manh Nguyen, Tan N. Ton Duc Thang Univ Fac Elect & Elect Engn Wireless Commun Res Grp Ho Chi Minh City 729000 Vietnam Telecommun Univ Nha Trang 650000 Khanh Hoa Vietnam Ton Duc Thang Univ Fac Elect & Elect Engn Commun & Signal Proc Res Grp Ho Chi Minh City 729000 Vietnam

This article proposes an integration of multiple reconfigurable intelligent surfaces (RISs) with a relay to enhance the performance of a low-power wide-area (LPWA) network. Specifically, besides using the traditional relaying approach to assist the transmission between an Internet of Things (IoT) sensor and a gateway, multiple RISs are also utilized to boost the intermediate links between the IoT sensor and the relay and between the relay and the gateway. We mathematically derive the analytical expressions of average outage probability (AOP) and average symbol error probability (ASEP) of this multiple-RIS-relay aided LPWA network over Nakagami-m fading channels. The performance of the proposed network is also compared with the performance of the relay-aided LPWA network without using RISs. The analytical results show that the exploitation of RISs can greatly enhances the performance of the LPWA network. Thus, the multiple-RIS-relay aided LPWA network can operate at the high frequency band for long range transmission. Moreover, the effect of various important factors such as the location of the RISs, the Nakagami-m parameters, the data transmission rate, and the modulation scheme on the performance of the multiple-RIS-relay aided LPWA network are also investigated in practical scenarios.

关键词： Relays Internet of Things Logic gates Mobile computing Computational complexity Channel estimation 6G mobile communication Low-power wide-area networks reconfigurable intelligent surfaces relay average outage probability average symbol error probability

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On the Performance of RIS-assisted Networks with HQAM

On the Performance of RIS-assisted Networks with HQAM

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Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit)

作者： Oikonomou, Thrassos K. Tyrovolas, Dimitrios Tegos, Sotiris A. Diamantoulakis, Panagiotis D. Sarigiannidis, Panagiotis Liaskos, Christos Karagiannidis, George K. Aristotle Univ Thessaloniki Dept Elect & Comp Engn Thessaloniki 54124 Greece Univ Western Macedonia Dept Elect & Comp Engn Kozani 50100 Greece Univ Ioannina Comp Sci Engn Dept Ioannina Greece Lebanese Amer Univ LAU Artificial Intelligence & Cyber Syst Res Ctr Beirut Lebanon

ISBN: (纸本)9798350344998;9798350345001

In this paper, we investigate the application of hexagonal quadrature amplitude modulation (HQAM) in reconfigurable intelligent surface (RIS)-assisted networks, specifically focusing on its efficiency in reducing the number of required reflecting elements. Specifically, we present analytical expressions for the average symbol error probability (ASEP) and propose a new metric for conditioned energy efficiency, which assesses the network's energy consumption while ensuring the ASEP remains below a certain threshold. Additionally, we introduce an innovative detection algorithm for HQAM constellations, which demonstrates a substantial reduction in computational complexity. Finally, our study reveals that HQAM significantly enhances both the ASEP and energy efficiency compared to traditional quadrature amplitude modulation (QAM) schemes.

关键词： HQAM Reconfigurable Intelligent Surfaces (RISs) Energy Efficiency average symbol error probability Detection Algorithm

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Extended α-η-μ Fading Distribution: Statistical Properties and Applications

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IEEE ACCESS 2022年 10卷 109803-109813页

作者： Al-Hmood, Hussien Abbas, Rafed Sabbar Al-Raweshidy, Hamed Univ Thi Qar Elect & Elect Engn EEE Dept Nasiriyah Iraq Univ Kufa Fac Engn Dept Elect Engn Kufa 540011 Iraq Brunel Univ London Dept Elect & Elect Engn London UB8 3PH England

In this paper, the impact of the non-linearity of the propagation medium on the extended eta-mu fading distribution is studied. In particular, the extended alpha-eta-mu fading model in which the parameter alpha represents the non-linearity of the propagation environment is presented via providing the exact and asymptotic of the statistical properties, namely, the probability density function (PDF), cumulative distribution function (CDF), and generalized-moment generating function (G-MGF). To this effect, exact closed-form mathematically tractable expressions of the outage probability (OP), average symbol error probability (ASEP), amount of fading (AoF), channel quality estimation index (CQEI) and effective rate (ER) are obtained. The asymptotic behaviour at high average signal-to-noise (SNR) values is also analysed to gain further insights into the influence of the index a on the performance metrics of the wireless communication systems. Moreover, the average channel capacity (ACC) under different adaptive transmission techniques, such as, optimum rate and adaptation (ORA), capacity of the channel with inversion and fixed rate (CIFR), and truncated inversion and fixed rate (TIFR) are derived. The validation of the derived expressions is verified via comparing the numerical results with the Monte-Carlo simulations as well as some previous works for different scenarios.

关键词： Extended alpha-eta-mu fading statistical properties outage probability average symbol error probability effective rate average channel capacity

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Performance Analysis of Cascaded Reconfigurable Intelligent Surface Networks

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IEEE WIRELESS COMMUNICATIONS LETTERS 2022年第9期11卷 1855-1859页

作者： Tyrovolas, Dimitrios Tegos, Sotiris A. Dimitriadou-Panidou, Emmanouela C. Diamantoulakis, Panagiotis D. Liaskos, Christos K. Karagiannidis, George K. Aristotle Univ Thessaloniki Elect & Comp Engn Dept Wireless Commun & Informat Proc Grp Thessaloniki 54124 Greece Univ Ioannina Comp Sci Engn Dept Ioannina 45110 Greece

Reconfigurable intelligent surfaces (RIS) have been presented as a solution to realize the concept of smart radio environments, wherein uninterrupted coverage and extremely high quality of service can be ensured. In this letter, assuming that multiple RIS are deployed in the propagation environment, the performance of a cascaded RIS network affected by imperfect phase estimation is evaluated. Specifically, we derive closed-form expressions for the outage probability, the ergodic capacity and the average symbol error probability that can be utilized to evaluate the coverage of the proposed network, as well as the average capacity and the data transmission accuracy. Finally, we validate the derived expressions through simulations and show that by choosing the number of the participating RIS correctly, a cascaded RIS network can outperform a single RIS-aided system and extend the network's coverage efficiently.

关键词： Phase estimation Fading channels Wireless networks Quality of service Estimation Capacity planning symbols Reconfigurable intelligent surfaces outage probability ergodic capacity average symbol error probability performance analysis

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Performance of MPSK modulation with imperfect phase-recovery under severe fading conditions

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ELECTRONICS LETTERS 2022年第8期58卷 333-335页

作者： Silva, Pedro Emilio Goria de Souza, Rausley Adriano Amaral Nardelli, Pedro Juliano Moualeu, Jules Merlin Mouatcho da Costa, Daniel Benevides LUT Univ Lab Elect Engn Lappeenranta Finland INATEL Santa Rita do Sapucai Brazil Univ Witwatersrand Elect & informat Engn Johannesburg South Africa Technol Innovat Inst Telecom Res Ctr Masdar U Arab Emirates

The authors study the performance of M-ary phase-shift keying (MPSK) modulation with imperfect carrier phase recovery in scenarios experiencing severe fading conditions. Specifically, MPSK is analysed over kappa$\kappa$-mu$\mu$ Extreme fading channels assuming a Gaussian-distributed noisy phase. For the theoretical framework, they derive the analytical expressions for the upper bound on the average symbol error probability, as well as their corresponding asymptotic behaviour in the high signal-to-noise ratio (SNR) regime. The derived expressions are valid for arbitrary values of the fading parameter m$m$, and Monte Carlo simulations are provided to verify the accuracy of the proposed mathematical analysis. Furthermore, the authors discuss how the channel parameter and phase variance affect the system performance for a wide range of SNR values.

关键词： Monte Carlo methods average symbol error probability Monte Carlo simulations Gaussian-distributed noisy phase M-ary phase-shift keying modulation phase shift keying fading channels MPSK modulation Gaussian noise error statistics symbol error probability carrier phase recovery signal-to-noise ratio Gaussian distribution

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